2021 discount Nobsound 6P1 6.8W x 2 discount high quality Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted sale

2021 discount Nobsound 6P1 6.8W x 2 discount high quality Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted sale

2021 discount Nobsound 6P1 6.8W x 2 discount high quality Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted sale
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Output Wattage 6.8 watts 1.8 watts 100.00 watts 200.00 watts
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Product description

Nobsound 6P1 Nobsound 6P1 Plus Nobsound MS-10D MKIII Douk Audio X1 Douk Audio G10 Nobsound 12AU7
Feature Vacuum tube amplifier; Single-Ended; Classic Vacuum tube amplifier; Headphone Amplifier; Single-Ended; Classic Bluetooth vaccum tube amplifier; Headphone amplifier; Hybrid; U-Disk/COAX/OPT Bluetooth vacuum tube MM phono power amplifier; 320W high power Vacuum tube mono channel / subwoofer amplifier Pure vacuum tube preamplifier
Vacuum Tube 5U4C * 1 + 6H8C * 2 + 6P1 * 4 5U4C * 1 + 6H8C * 2 + 6P1 * 4 Beijing 6N1 × 2 , Shuguang 6P1 x 2 GE 5654 x 2 6K4 x 1 Shuguang 12AX7 x 2 / 12AU7 x 2 / 6Z4 x 2
Max Power 6.8W * 2 6.8W * 2 25W * 2 160W x 2 100W(Low Gain) / 200W(High Gain)
Channel 2.0 2.0 2.0 (2.1) 2.0 (2.1) 1.0 (1.1) 2.0
Input RCA RCA Bluetooth + U-disk + Coaxial + Optical + RCA Bluetooth 5.0 + RCA + MM Phono RCA RCA
Output Stereo Passive Speakers Stereo Passive Speakers + Headphone Stereo Passive Speakers + Active Subwoofer + Headphone Stereo Passive Speakers + Active Subwoofer Mono Passive Speaker / Subwoofer + Active Subwoofer Active Speaker + Amplifier
Tone Control
THD ≤1% ≤1% ≤1% ≤0.5% ≤0.1% <0.03%
SNR ≥90db ≥90db ≥80dB >90dB ≥98dB ≥94DB
Speaker Impedance 4-8 ohm 4-8 ohm 4-16 ohm 4-8 ohm 2-8 ohm
Nobsound T3 Douk Audio T3 PRO Douk Audio P1 Douk Audio U2 PRO Douk Audio M1 PRO Music Levels
Feature Classic MM phono preamplifier Vacuum tube MM phono preamplifier; Audio preamp Bluetooth preamp; Headphone amp; Vacuum tube; Tone control; APTX-HD Digital interface; USB to Toslink optical/coaxial/I2S converter; XMOS XU208 2-CH Bluetooth amplifier; 320W high power; U-Disk; Tone control MIC sound level; Audio spectrum; RGB LED

  • This is the version without headphone amp function. If you need headphone amp function, please search B076CC92BX on Amazon.
  • Please make sure all tubes are fully inserted before powering on the amplifier. Otherwise the amp may be burned.
  • Both 4Ω and 8Ω speakers can connect to the 8Ω and 0Ω posts of this amplifier.

Retro Classic Vacuum Tube

  • 5U4C * 1 + 6H8C * 2 + 6P1 * 4
  • Vacuum tubes can offer warm retro analog sound unlike normal digital sound.

Hand Welding & Better Sound Quality

  • Totally hand welding can decrease sound losses and ensure better sound quality.
  • Its transformers adopt parallel output design, which achieve only half resistance. It has doubled power and still keeps the features of class A amps.

Luxury Components & Multiple-Paint Transformer Shield

  • This amp adopts 150µV 450V Hi-Fi level BC Components high voltage capacitors.
  • Multiple-paint transformer shield can avoid current interference, which can get lower background noise.
  • Sound quality is more natural and warmer.

Gold-Plated Pure Copper Terminals

  • Adopts gold-plated pure copper terminals.
  • Speaker out binding posts can accept banana plugs and bare speaker wires.
  • Both 4Ω and 8Ω speakers can connect to the 8Ω and 0Ω posts of this amplifier.

Nobsound 6P1

Packing List
  • Tube amplifier ×1
  • Power cable ×1

Parameters

  • Output power: 6.8W * 2
  • Frequency response: 20Hz-20KHz
  • Input impedance: 100K ohms
  • Output impedance: 4/8Ω
  • SNR: 90db
  • Input Sensitivity: 500mv-2000mv
  • Harmonic distortion: 1% (1KHz)
  • Tube: 5U4C * 1 + 6H8C * 2 + 6P1 * 4
  • Operating voltage: 110V

  • Weight: 7 kg / 15 lb
  • Size: 260*215*150 mm / 10.2*8.5*5.9 in
  • Size with knobs and terminals: 260* 260*150 mm / 10.2*10.2*5.9 in

Features & details

Features

  • This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality (with headphone amp function ASIN: B076CC92BX).
  • This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power.
  • Using antimagnetic transformer covers to shield current interference and achieve much lower static noise.
  • Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.
  • It has a classic and graceful appearance. The VU meters and vacuum tubes makes it more elegant and attractive.

Product information

Product Warranty: For warranty information about this product, please click here
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Q: How loud can it get? Is it adequate for just bedroom listening or can it be used for a pa…

A: Using a sound level meter app on my phone, connected to Jensen JHS-1533''s (94db sensitivit…

mudkicker | 6 months ago

Q: Do any of these tube amps have a subwoofer out? Thanks

A: To the best of my knowledge no they do not have a subwoofer out.
However, I am currently …

ELL | 2 years ago

Q: 6.8w? Seems light. Is that enough to power a large speaker or is this amp for powered sp…

A: Hello. It is 6.8W*2. 6.8W is for tube amplifiers. The power of tube amplifiers is differen…

Seller DoukAudio | 3 years ago

Q: input sensitivity?

A: Douk audio lists input sensitivity at 500mv-2000mv...
it’s a very decent albeit VERY en…

zaga | 1 year ago

Customer reviews

4.3 out of 54.3 out of 5
134 global ratings

Top reviews from the United States

KDCNewYork
5.0 out of 5 starsVerified Purchase
Incredible deal. Very Happy.
Reviewed in the United States on July 5, 2018
To all those folks expecting a luxury branded audiophile unboxing experience replete with laser-cut styrofoam and hand-written thank you cards, the folks at Cary Audio would love to talk to you. These folks are all about the packing tape and bubble wrap. To that order,... See more
To all those folks expecting a luxury branded audiophile unboxing experience replete with laser-cut styrofoam and hand-written thank you cards, the folks at Cary Audio would love to talk to you. These folks are all about the packing tape and bubble wrap. To that order, they spared no expense, because the chassis, 7 tubes, and obligatory black power-cord arrived without incident. However one might be hard-pressed to score Douk Audio any points for pretty packaging. Next to the finely coiffed offerings from Zappos and Prime! piled high in my mailroom, this box looked something my cousin might have sent me had she still resided in Humboldt County and was still dating that guy who knew a guy.

Be warned- there is no manual, map or diagram to speak of. Makes sense, since the original was probably in Chinese anyway so why not save a tree and a litany of complaints from the 100 million or so that have Prime but can’t read Mandarin.

Happily, since the tubes have a finite amount of pegs and designated to sockets with an equal amount of holes, anyone who attended a halfway decent pre-school has the requisite skillset required for assembly. Save for one thing:

Tubes are pure magic as long as you follow the rule. Don’t touch the glass. Ever. Look at them all you want, but tubes don’t like to be touched. While the risk for injury is much lower than (say) a halogen bulb, replacement tubes are not available at Ace Hardware. It’s worth mentioning since the original tube boxes are probably still in China, along with the instructions for proper handling. If you’re a young millennial with a retro hipster affectation and are seeking proper tube handling guidance, text a Gen X’er to call their Dad for the proper. Don’t forget to inquire about the break-in period. Mine was 72hours before the tubes started to open up.

The most important thing you should know is that this little amp is amazing. Incredible soundstage, articulate highs, tight bass and that warm, midrange bloom that these analog gems are famous for. This is a respectable bit of kit priced less than 1/3 of what most folks pay for their mobile.

Audition Source:
 Sony CDP series transport
Source configuration:
Direct/analog, using gold-plated interconnects.
Speakers auditioned:
Tannoy M1 (88db sensitivity)
Klipsch KB-15 Icon (94db)
Martin Logan Motion 15 (92db)

Sources auditioned:
Abbey Road (24/96 digital remaster)
Dark Side of the Moon (24/96 digital remaster)
Led Zepplin 4 (Barry Diament remaster)
Blue Train (FLAC)
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Knotscott
5.0 out of 5 starsVerified Purchase
Can''t Beat the Value
Reviewed in the United States on November 30, 2017
The Nobsound 6P1 is a very basic, attractive looking class-A integrated tube amp with modest power output that''s suitable for running one music source and a fairly efficient pair of speakers. The overall quality of the amp is impressive considering the modest price. The... See more
The Nobsound 6P1 is a very basic, attractive looking class-A integrated tube amp with modest power output that''s suitable for running one music source and a fairly efficient pair of speakers. The overall quality of the amp is impressive considering the modest price. The package arrived within about a week, fully intact, and was very well protected. Basic installation couldn''t be much simpler - install the tubes, plug it in, hook up speakers and music source, and you''re in business. I even liked the speaker connectors they use. Some sort of a schematic or instructions would have been nice, but it''s all pretty intuitive, and I''d guess they''re assuming that the buyers of an item like this have prior audio experience.

My first impressions of the sound of this amp were quite favorable considering the very low cost. The amp replaced an excellent pair of Dynaco ST70s that were run as a separate mono blocks. The Nobsound amp was purchased as an interim amp while I serviced my 50+ year old Dyna amps, so I didn''t want to spend a lot, but also didn''t want to abandon the level of fidelity I''m used to. The Nobsound 6P1 is priced lower than many lesser solid state amps and receivers, so I opted to give it a try, and am very happy with it so far.

This review is early on in my experience with the Nobsound amp. I''ll update as needed as I get more time with it. Expecting the Nobsound amp to perform at the level of the Dynas is a tall order, and it doesn''t, but it immediately sounded pretty darn good. The output is pretty modest at 6.8 watts per channel, and doesn''t have the power and punch of my Dynas, but they sound so much better than a comparably priced solid state amp or receiver. The initial sound was a little darker through the mids than my Dynas, and the bottom end isn''t as authoritative, but the mids did open up more as the amp warmed up and the components burned in. I''ve ordered some vintage tubes to experiment with in the preamp section, but for now I''m kind of amazed at what I got for what is really a very low price for a Class-A tube amp. Good tube amps can cost thousands of dollars, but the little Nobsound gives you a nice taste for a couple hundred bucks. It''s a really nice little amp. 5-stars for value, 4-stars for performance (edit - I went back and gave the performance 5 stars...it''s just too good for the money to leave it at 4 stars....it''s not world class, but is the among the best sound you can get from an amp in this price range.)

Update: So I''ve spent quite a bit more time with the little Nobsound amp, and I''m still pleased. As the components burn in, the sound has opened up nicely through the mids and highs. The addition of a pair of vintage RCA 6SN7GT tubes made a fairly notable improvement in clarity in the mids also. The modest power output is enough to suit my needs, but I don''t play the system loudly very often. If you like to crank your system, you may find the amp''s limits in a hurry, but aside from the known limits of the output, this is a nice amp. Highly recommended if you don''t need gobs of power, and you want clear musical sound with a good sound stage at a budget price. (additional edit - it took me two years to rebuild my old amps, and the Nobsound was flawless....not even a tiny glitch. I''m so impressed with the value and performance. It''s been a great purchase!)

Bonus update: Once my old Dyna amps were finished, I put the Nobsound amp up for sale. The guy who bought it was a seasoned audio lover, but had never had a tube amp. He hooked it up to a pair of older Klipsch speakers, and called me back immediately....he was totally surprised how clear it sounded. There''s a new tube lover in the world thanks to the little Nobsound amp. (I wasn''t surprised at all!)
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Birdmonkey
5.0 out of 5 starsVerified Purchase
Love this amp!
Reviewed in the United States on November 23, 2018
I was really surprised by this amplifier. I had read in many places that Chinese stuff is junk and that you have to pay thousands of dollars to get a decent class A amplifier. Well, that''s not true. This amplifier is wonderful! It looks great. It sounds great. The build... See more
I was really surprised by this amplifier. I had read in many places that Chinese stuff is junk and that you have to pay thousands of dollars to get a decent class A amplifier. Well, that''s not true. This amplifier is wonderful! It looks great. It sounds great. The build quality is great. I''m just amazed that I got this for the price I did here on Amazon. The shipping was incredibly fast too which was a surprise. When I ordered this I was afraid that 6.8 watts per channel was just not going to be enough. Well, it powers my bookshelf speakers very well. In fact, I never even turn the volume up more than a quarter way. It turns out that this is way more than enough power for me.

This amp is compact. I have enough room for a few of these so I might get another one.

I was going to upgrade the tubes but decided not to because it already sounds great. To upgrade all the tubes would cost me three to four hundred dollars. I did lots of research to find out how much and where to get all the replacement tubes. It would have to be a combination of Mullard, RCA, and Winged C tubes. It''s just not worth it in my opinion. Maybe someday if these tubes ever burn out.

Anyway, I love this amp and would recommend it to everybody.

This amp inspired me so much that I''m going to try to build one soon.

Update 12/10/18: I''m still using this amp for about 12 hours everyday and it hasn''t given me any problems at all. It sounds great.

I ordered all new tubes which cost way more than this amplifier itself. So far I have replaced all the 6J1 tubes with Russian Winged C tubes. I don''t notice much difference if any at all. This tells me that the tubes that come with this amplifier are good to begin with.
I''m still waiting for three more tubes that are hard to find and get. Wow, they were expensive. Hopefully they will make this amplifier sound even better. However, as it is I''m totally happy with this amp. It''s great. I love it!

update: 1/12/19
I have upgraded all the tubes and been listening to it like this for more than a month. I didn''t think the sound could get any better but it did. Now this amplifier sounds even more incredible. Now I know that vintage tubes can really make a difference. Here''s the tubes I installed:

(4) WINGED "C" (SED) 6P1P-EB (these are Russian tubes, not vintage but they were the only upgrades I was able to find
(2) RCA 6SN7GT / GTB Black Plate (I was able to get these used off ebay for about $50; they''re made in the 50''s or 60''s
(1) Mullard 5V4G (I was able to get this tube on ebay for around $120; it''s the rectifier tube I believe and definitely the most expensive)

So something with this combination of tubes really works excellent for me. I couldn''t be happier.

I still have had no problems with this amp and I use it at least 12 hours per day. It always gets very hot but I guess this is just normal for tube amplifiers. Sometimes I turn it off for 30 minutes or an hour to give it a break.

It''s also probably worth mentioning that I bought another tube amplifier that costed 6 times the price of this and it doesn''t sound as good as this small amp. The only thing I can figure is that this Nobsound 6P1 amp is just designed and built really well and maybe adding the vintage tubes makes it even better. Unfortunately, I''ve seen some other reviews on here about this amp having problems or failing. I guess you kind of have to take your chances on getting a good one. I feel lucky to have received a good one.

One other thing that somebody else had also mentioned is the blue power led light on the front of this amp. It really is bright. That''s why I eventually put a piece of tape over it. Now it doesn''t bother me at all.
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Stephe Koontz
5.0 out of 5 starsVerified Purchase
Amazing sound, a few small design issues.
Reviewed in the United States on October 23, 2020
First the good part: this thing, even with the stock tubes sounds amazing! It hits way above its price point and has a lot of potential to be even better. I paired this with a Yamaha CD-S300BL as the source and it''s driving a pair of high efficiency Klipsch KB-15 Icon... See more
First the good part: this thing, even with the stock tubes sounds amazing! It hits way above its price point and has a lot of potential to be even better. I paired this with a Yamaha CD-S300BL as the source and it''s driving a pair of high efficiency Klipsch KB-15 Icon 5-1/4-Inch 2-Way Bookshelf Speakers. I''ve yet to need to turn it over 1/2 volume to fill a 15X20 ft room. The clarity and warmth is something you just aren''t going to get from anything but a tube amp.

That said, there are a few issues that need to be addressed. The first being that bright blue power LED. Some black touch-up paint took care of that as it''s not needed with the meter lights and doesn''t fit the theme of the amp. I will say the meter illumination matches the tube glow almost perfectly!

There also is one design flaw, the first capacitor after the rectifier tube is WAY too large. You can see more about this on various forums, but looking at the spec sheet for the Russian 5U4C tube, it''s recommending a 5uf filter cap and the amp has a 150uf one. Not only is this causing the tube to work extra hard, if you cycle the power in a short period of time, this cap can cause a arc inside the tube and damage it. A 4.7uf to 10uf 450V cap will fix this.

I also read a few folks saying they had issues with the output cap and resistor frying over time, so an upgrade to a couple of Nichicon FG Capacitors 100V 220uf Audio Grade caps and 5W 270 resistors while you are inside is probably a good idea. A little more work, but a better resolution, is to give each output tube it''s own cathode cap and resistor. Please understand there is lethal voltage inside these even when they are unplugged and make sure all caps are safely drained before you work inside it.

The other issue is the power transformer is tapped for 110V (standard in China). Most houses in the US have 122-128V at the outlet, which for most appliances has no effect, but on a tube amp it throws the internal voltages high, making the B+ voltage over spec plus makes the tubes/ transformer run hotter than they should.

A simple solution is either externally wire a 3a 120V/12V transformer in a bucking configuration to pull the voltage down ~12V, or do what I did and purchase an APC APC LE1200 or LE600 automatic voltage regulator and set it to 110V. Getting the input voltage in the 105-110 range will make the amp run noticeably cooler and this over volting is likely the cause in some reviews of premature tube failures, meter lighting burning out etc. Plus IMHO in further improves the sound.

Honestly, even if you don''t feel comfortable going inside the amp, just buying one of these APC regulators to step the input voltage to 110V and being careful to never cycle the power in a short period of time, this amp will work fine.

I have heard using russian replacements for the China 6P1 tubes improves the sound and I also have ordered some vintage sylvania replacements for the 6H8C and will update my review after I try these out. I attached a schematic I found online if anyone is interested.

It seems like a well made/designed amp, other than the one oversize cap, is an easy to repair point to point construction and it a great introduction into tube amplifiers at a low price point.

Update: I''ve uploaded a schematic with my suggested changes. I ordered a matched pair of the Russian 6P1P tubes, installed the pairs together per channel (left and right sockets) and it made a nice improvement. I also changed out the 6H8C for a pair of vintage Sylvania 6SN7 side getter, short bottle tubes and that improved the bass a lot.

One final note, I upgraded the speakers from a pair of Klipsh KB-15 Icons to a pair of Klipsh RP-600M, HUGE improvement. If you can afford these higher end speakers, you won''t be disappointed. The KB-15s were good with jazzy, easy listening type music but struggled with rock and other more complex types of music. If you have the space and budget, the PR-600M are much better speakers.
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MaxxK
4.0 out of 5 starsVerified Purchase
wonderful, gorgeous sound but with some concerns
Reviewed in the United States on June 16, 2020
This ridiculously inexpensive true PTP hand wired, all tube amp will give you a generous dollop of the glorious “single ended tube magic” audiophile purists live for. Paired with sensible speakers and playing appropriate music at modest volume that rich, 3D blooming... See more
This ridiculously inexpensive true PTP hand wired, all tube amp will give you a generous dollop of the glorious “single ended tube magic” audiophile purists live for. Paired with sensible speakers and playing appropriate music at modest volume that rich, 3D blooming quality will astound anyone used to cheap Bluetooth speakers and the like. Although you get better sound still with a wired connection say from a lap top streaming from TIDAL or your private NAS of ripped CDs like me, I use an AudioEngine B1 blue tooth receiver and stream Spotify a lot from my phone and even that is just exquisite sounding. In this system I play acoustic jazz, Hawaiian music, funk fusion, retro exotic stuff hey it’s in my backyard cabana by my pool here in sunny San Diego! You will be shocked what a few good watts into the right speaker can do.
You will receive an amp without any documents; no instructions, nothing. So if you are scratching your head wondering what those funny looking light bulb things are I’d advise you to do some reading about tube hifi amps to understand what you are getting into. NEVER run a tube amp without speakers connected. Always burn in new tubes with no music for awhile before stressing them. Especially need to understand how to choose speakers for low powered tube amps.

Douk Audio has a rather nebulous description of this amp’s design but I think I now understand what it is. At first sight people may think it’s a conventional push-pull class AB amp seeing two power tubes per channel and output transformers. Actually this uses a design made legendary by the one and only Atma-Sphere amps but with output transformers like a famous company called BAT. So each channel is actually two pure class A amps running full wave but 180 degrees out of phase and summed by the output transformer. No crossover distortion possible among other unique characteristics. Pretty slick. There is no trace of hard edgy tonalities, very rich pure and liquid. The 6P1 tubes are sort of obscure orphans, there is not another substitute that I know of so far. The driver tubes however, are basically 6SN7 but I have no desire to tube roll other than what I explain below.

Now for the concerns: When I first got this amp all was great for a brief time then one channel started making fizzy distortions and cut out. I see others reporting this too. I swapped tubes from one side to the other, still the same, briefly thought it was a bad volume pot. I fiddled with different cables etc. Looked closely at the wiring of the input jacks possibly the r and l wires were almost touching where they were stripped to solder. Tried again for a day or two with the same problem then it mysteriously went away. I ordered a replacement and stress tested this amp for over a month now and during this time and it’s been perfect ever since and in fact has greatly bloomed sound-wise even more so I finally returned the replacement. During this time I finally stumbled on a DIY audio forum where some very knowledgeable folks got to the bottom of things: This amp uses a lower milliamp rated rectifier tube and a way, way too big coupling capacitor which runs the rectifier tube very hard ensuring a short life and probably explains the noises I heard as the tube was beat into submission. From there I learned you can use a GZ34 tube in its place which is also a soft start but handles 100mA more current, though the coupling cap is still too big. As soon as I verify that info I will replace the cap with a more sensible 47fuF 450v. Being PTP hand wired swapping components is easy no circuit board! In shopping for rectifier tubes I quickly discovered why they may have used this tube; the stock tube is about $9.00 and a GZ34 is at least $25 or so. So either they didn’t bother to understand tube charts which clearly list how big the cap should be or they very cleverly found a way to make a lot more money skimping on an expensive component in an amp with surely a razor thin profit margin, knowing it would probably not fail until well after the return period. As for the large cap,this amp is VERY quiet, that cap smoothes out noise and bigger equals quieter maybe they figured if more is good way more is even better. Also, unless it’s hopefully hidden inside the chassis this amp has no fuse! So this rectifier tube issue is concerning.

There is also only an 8 ohm tap. Ideally a tube amp has 8 and 4 ohm taps and you pick what is closest but to get the most out of this low powered amp you should use speakers with higher impedance and sensitivity, although that’s a general guideline both are actually more complicated than those simple numbers. You could get all kinds of expensive tube friendly speakers and go into full audio heaven and I might but in my humble cabana with limited space I am getting wonderful sound with a cheap pair of used Mission 8VET speaker I got from craigslist. Mind you these speakers on paper should not be a good match, 6 ohms probably only 86db efficient, very typically British. Every city has a guy or two that makes business out of selling used yard sale type hifi gear out of his living room. My advice is look one up on Craigslist and see if you can go over with the amp and try a few speakers doing some reading on them first if possible. Beware of small monitor speakers that try too hard to impress with bass that is more than they are capable or tilted up high end or both. Compared against each other the speaker that jumps out at you right away might be the one that grates on your nerves over the long term. In summary I’ve been aware of the various direct from China ultra cheap tube amps and I have a long history in High End audio. I couldn’t contain my curiosity any longer so I bought this amp, assumed the risks and am 100% delighted with it. A life without risk is not a life.
17 people found this helpful
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Stefano
5.0 out of 5 starsVerified Purchase
The best 240$ you can spend for entering the tube world.
Reviewed in the United States on November 5, 2018
This amplifier is used in my work office. I run a pair of hand made part-express overnight sensation. The design of the amp is quite standard. At the beginning the sound is a bit mushy but it will open up after a week (or so) or listening (keep it on). No hum. No hiss.... See more
This amplifier is used in my work office. I run a pair of hand made part-express overnight sensation. The design of the amp is quite standard. At the beginning the sound is a bit mushy but it will open up after a week (or so) or listening (keep it on).
No hum. No hiss. No bells and whistles. Plain real good sound. The stock tubes are quite good. You can try some tube rolling as you wish. The amp does not compare with my home setup (mark-levinson ML23.5 + magnepan biamps + tube_dac) but overall it is quite good. 240$ well spent.

A small cosmetic note. Everything turns on and looks retro-style. The glowing tubes. The yellowish VU-meters. Well, the bright BLUE LED (power) is totally disturbing. I ended up opening the bottom plate and snipping and cutting one of the LED wires.. Now it is uber-cool.
It would be nice if the manufacturer were posting the modifications to get 4 ohms taps out of the output transformers.

Conclusion.
The best 240$ you can spend for entering the tube world.
18 people found this helpful
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Tube Guy
5.0 out of 5 starsVerified Purchase
My compliments to DaukAudio and Amazon!
Reviewed in the United States on September 14, 2018
To the person/persons responsible for developing, creating, and offering this excellent amplifier to the market, THANK YOU for the professional hand craftsmanship you put into this excellent amplifier! I received it in 2 business days, as advertised and couldn''t be more... See more
To the person/persons responsible for developing, creating, and offering this excellent amplifier to the market, THANK YOU for the professional hand craftsmanship you put into this excellent amplifier! I received it in 2 business days, as advertised and couldn''t be more happier that I made this purchase.

DaukAudio don''t mess around. This unit was packaged in a way where it had a cushioned shield fully protecting every side including top and bottom of the amp. And each tube carefully double wrapped in bubble wrap, nicely tucked in a very safe area.

Before my purchase, I read a review mentioning that Russian tubes were available for this amp. I feel that the tubes that arrived with the unit work perfectly fine! Keep in mind, that the included tubes are typically NOS "new old stock". Tubes require a break-in period. When new, they''re are only on 1 minute for testing. To get the true sound of tubes, you need to allow at least 15 to 20 hours of use, before you begin to experience the pleasure of hearing their true sound. I bought my amp for TV audio, watching music videos and movies. Trust me, the tubes, the hand built quality, the look, the sound, THIS AMP IS PERFECT AND WORTH EVERY PENNY! I love this amplifier so much that I''m considering buying another unit to replace my old JVC amplifier. Thank you for creating one cool amp!!
20 people found this helpful
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liam
5.0 out of 5 starsVerified Purchase
Just do it !! you wont regret it
Reviewed in the United States on August 14, 2019
This is the best sounding amp I have ever owned. Now granted this is my first tube amp. I recommend changing the tubes out I used 2 RCA 6SN7GT and for the 4 6P1P-EB’s I bought some NOS Russian tubes I picked up off of Ebay. I waited until I ran the amp for at least 100... See more
This is the best sounding amp I have ever owned. Now granted this is my first tube amp. I recommend changing the tubes out I used 2 RCA 6SN7GT and for the 4 6P1P-EB’s I bought some NOS Russian tubes I picked up off of Ebay. I waited until I ran the amp for at least 100 hours first to let the tubes break in. They sounded great. However, the RCA/Russian tubes sound even better.
This amp sounds so good everything is clear clean separate and warm. Good lows, warm rich mids, and crisp highs. I am pushing 2 Klipsch RP-150m’s the sound is absolutely amazing and the amp has plenty of power for them I rarely turn it up past half way and it fills my living room with sound. I can push the amp pretty far before I get distortion. I am extremely happy with this amp for the price its amazing.
Remember the tubes do have to break in and that takes some time I left the amp on for a week straight. Of course, I had speakers attached never run an amp without a load. After about three days it started sounding really good at the end of a week it was sonic nirvana.
I only use this for my turntable I am using a Nobsound Little Bear T7 for my phono preamp and after they are grounded this thing is dead silent. You can turn the amp all the way up and hear barley a hum. I also use a 100mm 12 vdc fan to keep it cool on my shelf as it gets hot enough to bake cookies.
It was shipped packed really well and as others have stated smelled like bug spray. You have to put the tubes in and no there is no instructions but it is super easy to figure out. The blue power light is a blinding eyesore I painted over mine with black nail polish.
You can’t go wrong for an amp in this price range even with replacing the tubes it’s still cheaper than anything out there for this performance.
12 people found this helpful
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Old Dan
5.0 out of 5 starsVerified Purchase
Perfect intro to the audiophile world.
Reviewed in Canada on June 26, 2019
Just got it today and as I type this I''m listening to a video on Youtube of the O''Keeffe Music foundation. Before that I listened to a Tellarc CD of Rhapsody in Blue. I''m actually hearing things I had simply not heard on my other audio system. Not even broken in and yet...See more
Just got it today and as I type this I''m listening to a video on Youtube of the O''Keeffe Music foundation. Before that I listened to a Tellarc CD of Rhapsody in Blue. I''m actually hearing things I had simply not heard on my other audio system. Not even broken in and yet shows its well worth the price of that amp. Now I''m thinking of getting the tube preamp of the same series. It''s been basically a week for that amp to burn in its tubes. Yesterday I blew the socks off of a friend that is an audiophile. His conclusion is that it''s awesome and well worth the cost. In the next few months I plan on getting better tubes. I''ll keep you posted. Oh, about the high temperature? I''m wondering if some aren''t simply unaware as to how hot tubes electronics runs. Now a month later. Got my hands on a few direct cut LPs and also Russian pressing and this is where I learned that less is better. Don''t try to listen to this amplifier full blast. It''s not made for that. Set it to comfortable room level and rediscover your music!
Just got it today and as I type this I''m listening to a video on Youtube of the O''Keeffe Music foundation. Before that I listened to a Tellarc CD of Rhapsody in Blue. I''m actually hearing things I had simply not heard on my other audio system. Not even broken in and yet shows its well worth the price of that amp. Now I''m thinking of getting the tube preamp of the same series.

It''s been basically a week for that amp to burn in its tubes. Yesterday I blew the socks off of a friend that is an audiophile. His conclusion is that it''s awesome and well worth the cost. In the next few months I plan on getting better tubes. I''ll keep you posted.

Oh, about the high temperature? I''m wondering if some aren''t simply unaware as to how hot tubes electronics runs.

Now a month later. Got my hands on a few direct cut LPs and also Russian pressing and this is where I learned that less is better. Don''t try to listen to this amplifier full blast. It''s not made for that. Set it to comfortable room level and rediscover your music!
8 people found this helpful
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J Cuan Lee
2.0 out of 5 starsVerified Purchase
No es lo que esperaba
Reviewed in Mexico on July 15, 2021
Los bulbos se usan únicamente en las etapas preamplificadoras donde tienen muy poca relevancia. La etapa de salida es un clase AB común a transistores. Cuando se solicita un amplificador a base de bulbos, es debido a que en su etapa de salida producen una curva de...See more
Los bulbos se usan únicamente en las etapas preamplificadoras donde tienen muy poca relevancia. La etapa de salida es un clase AB común a transistores. Cuando se solicita un amplificador a base de bulbos, es debido a que en su etapa de salida producen una curva de distorsión/potencia con un codo no muy agudo por lo que es poco notoria al oido humano en el caso de manejarlos en alto nivel. En el caso de los transistores se nota ese cambio brusco en distorsión a un aumento de la potencia máxima.
Los bulbos se usan únicamente en las etapas preamplificadoras donde tienen muy poca relevancia. La etapa de salida es un clase AB común a transistores.
Cuando se solicita un amplificador a base de bulbos, es debido a que en su etapa de salida producen una curva de distorsión/potencia con un codo no muy agudo por lo que es poco notoria al oido humano en el caso de manejarlos en alto nivel. En el caso de los transistores se nota ese cambio brusco en distorsión a un aumento de la potencia máxima.
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snapshooter
5.0 out of 5 starsVerified Purchase
Very clear, good volume. Amazing deal.
Reviewed in Canada on February 14, 2021
Compared with a pair of Dynaudio bookshelf speakers it’s got me listening to everything all over again, and I’m astonished at the detail that I never heard before. The classical fanatics might have some complaints about linearity or something, but almost everything I listen...See more
Compared with a pair of Dynaudio bookshelf speakers it’s got me listening to everything all over again, and I’m astonished at the detail that I never heard before. The classical fanatics might have some complaints about linearity or something, but almost everything I listen to is folk, and I think the curious little thing is reproducing just about everything that the engineers intended it to. The bass will never shake the floor, but ... good. 6.7 watts and it fills a room.
Compared with a pair of Dynaudio bookshelf speakers it’s got me listening to everything all over again, and I’m astonished at the detail that I never heard before. The classical fanatics might have some complaints about linearity or something, but almost everything I listen to is folk, and I think the curious little thing is reproducing just about everything that the engineers intended it to. The bass will never shake the floor, but ... good. 6.7 watts and it fills a room.
2 people found this helpful
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Harry Kornseth
5.0 out of 5 starsVerified Purchase
Very Impressed
Reviewed in Canada on December 10, 2018
I was hesitant to buy from a manufacturer I had never heard of- but I am very happy with this. I have it set up in my office with some good bookshelf speakers and it is audiophile quality to my ears. I would buy it again. And I had some minor set-up issues-the company was...See more
I was hesitant to buy from a manufacturer I had never heard of- but I am very happy with this. I have it set up in my office with some good bookshelf speakers and it is audiophile quality to my ears. I would buy it again. And I had some minor set-up issues-the company was fast to respond and very helpful. Burned in tubes for 20 hours-super warm now.
I was hesitant to buy from a manufacturer I had never heard of- but I am very happy with this. I have it set up in my office with some good bookshelf speakers and it is audiophile quality to my ears. I would buy it again. And I had some minor set-up issues-the company was fast to respond and very helpful. Burned in tubes for 20 hours-super warm now.
4 people found this helpful
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Nobsound 6P1 Nobsound 6P1 Plus Nobsound MS-10D MKIII Douk Audio X1 Douk Audio G10 Nobsound 12AU7
Feature Vacuum tube amplifier; Single-Ended; Classic Vacuum tube amplifier; Headphone Amplifier; Single-Ended; Classic Bluetooth vaccum tube amplifier; Headphone amplifier; Hybrid; U-Disk/COAX/OPT Bluetooth vacuum tube MM phono power amplifier; 320W high power Vacuum tube mono channel / subwoofer amplifier Pure vacuum tube preamplifier
Vacuum Tube 5U4C * 1 + 6H8C * 2 + 6P1 * 4 5U4C * 1 + 6H8C * 2 + 6P1 * 4 Beijing 6N1 × 2 , Shuguang 6P1 x 2 GE 5654 x 2 6K4 x 1 Shuguang 12AX7 x 2 / 12AU7 x 2 / 6Z4 x 2
Max Power 6.8W * 2 6.8W * 2 25W * 2 160W x 2 100W(Low Gain) / 200W(High Gain)
Channel 2.0 2.0 2.0 (2.1) 2.0 (2.1) 1.0 (1.1) 2.0
Input RCA RCA Bluetooth + U-disk + Coaxial + Optical + RCA Bluetooth 5.0 + RCA + MM Phono RCA RCA
Output Stereo Passive Speakers Stereo Passive Speakers + Headphone Stereo Passive Speakers + Active Subwoofer + Headphone Stereo Passive Speakers + Active Subwoofer Mono Passive Speaker / Subwoofer + Active Subwoofer Active Speaker + Amplifier
Tone Control
THD ≤1% ≤1% ≤1% ≤0.5% ≤0.1% <0.03%
SNR ≥90db ≥90db ≥80dB >90dB ≥98dB ≥94DB
Speaker Impedance 4-8 ohm 4-8 ohm 4-16 ohm 4-8 ohm 2-8 ohm
Nobsound T3 Douk Audio T3 PRO Douk Audio P1 Douk Audio U2 PRO Douk Audio M1 PRO Music Levels
Feature Classic MM phono preamplifier Vacuum tube MM phono preamplifier; Audio preamp Bluetooth preamp; Headphone amp; Vacuum tube; Tone control; APTX-HD Digital interface; USB to Toslink optical/coaxial/I2S converter; XMOS XU208 2-CH Bluetooth amplifier; 320W high power; U-Disk; Tone control MIC sound level; Audio spectrum; RGB LED

Retro Classic Vacuum Tube

  • 5U4C * 1 + 6H8C * 2 + 6P1 * 4
  • Vacuum tubes can offer warm retro analog sound unlike normal digital sound.

Hand Welding & Better Sound Quality

  • Totally hand welding can decrease sound losses and ensure better sound quality.
  • Its transformers adopt parallel output design, which achieve only half resistance. It has doubled power and still keeps the features of class A amps.

Luxury Components & Multiple-Paint Transformer Shield

  • This amp adopts 150µV 450V Hi-Fi level BC Components high voltage capacitors.
  • Multiple-paint transformer shield can avoid current interference, which can get lower background noise.
  • Sound quality is more natural and warmer.

Gold-Plated Pure Copper Terminals

  • Adopts gold-plated pure copper terminals.
  • Speaker out binding posts can accept banana plugs and bare speaker wires.
  • Both 4Ω and 8Ω speakers can connect to the 8Ω and 0Ω posts of this amplifier.

Nobsound 6P1

Packing List
  • Tube amplifier ×1
  • Power cable ×1

Parameters

  • Output power: 6.8W * 2
  • Frequency response: 20Hz-20KHz
  • Input impedance: 100K ohms
  • Output impedance: 4/8Ω
  • SNR: 90db
  • Input Sensitivity: 500mv-2000mv
  • Harmonic distortion: 1% (1KHz)
  • Tube: 5U4C * 1 + 6H8C * 2 + 6P1 * 4
  • Operating voltage: 110V

  • Weight: 7 kg / 15 lb
  • Size: 260*215*150 mm / 10.2*8.5*5.9 in
  • Size with knobs and terminals: 260* 260*150 mm / 10.2*10.2*5.9 in

Features & details

Features

  • This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality (with headphone amp function ASIN: B076CC92BX).
  • This amplifier adopts transformer parallel output to reduce its internal resistance by half and achieve doubled improvement on its power.
  • Using antimagnetic transformer covers to shield current interference and achieve much lower static noise.
  • Its sound output is full of analog style. The bass part is deep and powerful and the vocal part is sweet and intoxicating.
  • It has a classic and graceful appearance. The VU meters and vacuum tubes makes it more elegant and attractive.

Product information

Product Warranty: For warranty information about this product, please click here

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