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

3.7 out of 5 stars 156 ratings

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Voltage 1.1E+2 Volts
Manufacturer Nobsound
Maximum supply voltage 110 Volts
Minimum supply voltage 110 Volts
Mounting type Surface Mount
Brand Nobsound
Number of channels 2
Output power 13.6 Watts
Package type box
Specification met FCC

About this item

  • This Class A single-ended vacuum tube amplifier adopts hand welding to ensure the true reality of the sound quality.
  • 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.

Buy it with

This item: Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted
$433.99
Get it by Tuesday, Jun 24
Only 5 left in stock.
Sold by Douk Audio Direct and ships from 鶹 Fulfillment.
Total price:$00
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Technical Details

Manufacturer ‎Nobsound
Place of Business ‎ShenZhen, GuangDong 518110,CN
Item model number ‎4330977234
Parcel Dimensions ‎38.61 x 33.27 x 24.89 cm; 6.92 kg
ASIN ‎B073ZXZ3Z5

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


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Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Parcel Dimensions ‏ : ‎ 38.61 x 33.27 x 24.89 cm; 6.92 kg
  • Date First Available ‏ : ‎ July 22 2017
  • Manufacturer ‏ : ‎ Nobsound
  • Place of Business ‏ : ‎ ShenZhen, GuangDong 518110,CN
  • ASIN ‏ : ‎ B073ZXZ3Z5
  • Item model number ‏ : ‎ 4330977234
  • Customer Reviews:
    3.7 out of 5 stars 156 ratings

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This Item
Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted
Nobsound 6P1 6.8W x 2 Vacuum Tube Power Amplifier; Stereo Class A Single-Ended Audio Amp Handcrafted
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Price$433.99$419.99$799.99$215.60-10%$193.49
Was:$214.99
$89.99
Delivery
Get it by Tuesday, Jun 24
Get it by Tuesday, Jun 24
Get it Jul 15 - Aug 6
Get it by Tuesday, Jun 24
Get it by Tuesday, Jun 24
Get it by Tuesday, Jun 24
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number of channels
voltage
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Product Description

Nobsound 6P1
Nobsound 6P1 Plus
Nobsound MS-10D MKIII
Douk Audio X1
Douk Audio G10
Nobsound 12AU7
Customer Reviews
3.7 out of 5 stars 156
3.7 out of 5 stars 47
4.0 out of 5 stars 157
4.1 out of 5 stars 430
3.1 out of 5 stars 8
3.5 out of 5 stars 87
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) no data
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 no data no data no data no data
THD ≤1% ≤1% ≤1% ≤0.5% ≤0.1% <0.03%
SNR ≥90 ≥90 ≥80 >90dB ≥98 ≥94ٵ
Speaker Impedance 4-8 ohm 4-8 ohm 4-16 ohm 4-8 ohm 2-8 ohm no data
Nobsound T3
Douk Audio T3 PRO
Douk Audio P1
Douk Audio U2 PRO
Douk Audio M1 PRO
Music Levels
Customer Reviews
4.4 out of 5 stars 199
4.0 out of 5 stars 154
4.2 out of 5 stars 967
4.0 out of 5 stars 117
4.4 out of 5 stars 611
4.5 out of 5 stars 7
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
Nobsound 6P1

  • This is the version without headphone amp function. If you need headphone amp function, please search B076CC92BX on 鶹.
  • 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.

1

Retro Classic Vacuum Tube

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

2

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.

3

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.

4

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

Nobsound 6P1

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

Brands in this category on 鶹

Customer reviews

3.7 out of 5 stars
156 global ratings

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Share your thoughts with other customers

Customers say

Customers like the sound quality and value for money of the electronic component amplifier. They mention it has a fantastic sound and the bass will never shake the floor. Customers also say it's a perfect intro to the audiophile world.

Select to learn more

5 customers mention "Sound quality"5 positive0 negative

Customers are satisfied with the sound quality of the product. They mention it has a fantastic sound and the bass will never shake the floor. Some say it's a perfect intro to the audiophile world.

"I love the sound this amp puts out, very warm." Read more

"...have connected to Klipsch Cornwall IV speakers and it really sounds great. it does improve with long break in time...." Read more

"...negative reviews however, so YMM very well V. My copy is still sounding beautiful, though." Read more

"...in my office with some good bookshelf speakers and it is audiophile quality to my ears. I would buy it again...." Read more

3 customers mention "Value for money"3 positive0 negative

Customers are satisfied with the value for money of the product. They mention it's well worth the price.

"...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...." Read more

"...if you have efficient speakers this may be the best value in tube amps out there. really happy with it." Read more

"Very clear, good volume. Amazing deal...." Read more

Top reviews from Canada

  • Reviewed in Canada on June 27, 2019
    Verified Purchase
    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!
    14 people found this helpful
    Report
  • Reviewed in Canada on October 31, 2021
    Verified Purchase
    I love the sound this amp puts out, very warm.
    2 people found this helpful
    Report
  • Reviewed in Canada on October 17, 2021
    Verified Purchase
    The amp has been great so far. Zero issues with transformer buzz and the tubes have been perfect, no issues or noise at all. I currently have connected to Klipsch Cornwall IV speakers and it really sounds great. it does improve with long break in time. It smells toxic , strong oil smell for about 5 days, the smell goes away. It exceeded my expectations and I am keeping it. if you have efficient speakers this may be the best value in tube amps out there. really happy with it.
    3 people found this helpful
    Report
  • Reviewed in Canada on February 14, 2021
    Verified Purchase
    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. There are quite a few very negative reviews however, so YMM very well V. My copy is still sounding beautiful, though.
    4 people found this helpful
    Report
  • Reviewed in Canada on December 10, 2018
    Verified Purchase
    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.
    6 people found this helpful
    Report
  • Reviewed in Canada on November 10, 2021
    Verified Purchase
    So I am first of all running super efficient 1985 Klipsch Cornwalls, and this is in a simple 2 channel mostly analog setup. In all the forums they say that Cornwalls LOVE the Dynaco ST70 power amplifier and PAS3 Pre-amp. So I found a museum quality example of said amplifier and paid a guy to recap it and beef it up. Well the amp took months and came back with all sorts of problems. I pretty well publicly swore off tubes and found a great deal on a nice eMotiva power amp and matching pre and a reference CD player. So now we get to the Nobsound amplifier, I was very happy with the eMotiva but still longed for tubes. I snagged this amp a few weeks ago and totally LOVE it. Its an easy swap from the eMotiva power amp to this one and its about 90% of the eMotiva….I use this amp for quieter music like Jazz and singer/songwriter stuff. I love it!!!
    3 people found this helpful
    Report

Top reviews from other countries

Translate all reviews to English
  • J Cuan Lee
    2.0 out of 5 stars No es lo que esperaba
    Reviewed in Mexico on July 15, 2021
    Verified Purchase
    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.
    Report
  • Movie Fan
    5.0 out of 5 stars Audiophile Tube Rectified Class A sound in an Affordable Design
    Reviewed in the United States on April 25, 2021
    Verified Purchase
    This will be a multi-part review as the amp burns in. I will edit the review over time.

    Part i - Unboxing, setup and integration with existing equipment and sound characteristics during initial 14 hours.

    Background

    This is my first tube HiFi amplifier. It is not my first tube amp. I have owned several guitar tube amplifiers and a Hammond M3 Organ which had a tube amp inside it. I am very familiar with guitar tube amps having owned and played professionally over 35 years. I know how tubes are suppose to sound and can recognize the various differences in tubes by different manufacturers and age. I have also modified guitar tube amps.

    Arrival

    The box was simple and heavily taped. The amp came bagged and taped and was suspending in a framework of foam. The tubes were bubble wrapped individually and inside a bubble wrap bag then tapped to the amp bag.

    The inside of the box and amp itself smelled of chemicals. I understand this to be insecticide commonly used in industrial shipments from China.

    The Tubes shipped were 4 Chinese 6P1 two marked 81.4 and two marked 80.4 one had "J 06" in white hand drawn in a diamond. I Split the pairs to keep both sides equal. 80.4 in front, 81.4 in back. The rectifier tube is a Chinese 5U4C. Power Tubes (2 ea) are Chinese 68HC.

    After full tube burning I do intend to roll power and pre-amp tubes. The Rectifier tube I am going to leave alone. As it appears the manufacturer swapped the stock 5Z4P tube for the 5U4C. There were some failures noted a few years back that may have facilitated this change. I am adding a APC LE1200 voltage regulator set to 110 volts. (a good thing to do for this amp in this old house) Read Stephe Koontz review for more info on tubes and mods she has made.

    No manual. Tube install was easy. I wore white gloves when handling the tubes and gently pushed them into place.

    The insecticide smell goes away after a day or two.

    On power up I let the amp warm up and settle in for about an hour before sending it a signal.

    Set Up and Initial Sound Quality

    I am using a Fosi Box X2 Phono /Line Pre-AMplifier with GE tubes. My initial signals I sent were from a Lenovo tablet running USB Audio Player Pro with Tidal and MQA enabled. Through a ifi HipDac to the FOsi pre-amp, signal splitting the output to monitor VU with DOUK audio LED VU meters configured L and R with peak hold (see picture). True to other reviewers the first several hours of music (playing a ambient playlist on Tidal) the audio was murky, and slightly muffled. After four hours I turned it off and came back later that night, and listened to MQA albums by Dr. Lonnie Smith and Crosby Still and Nash and some beaty electronic music. The sound was coming to life slowly. (fully expected) The highs and midrange came in first and the bass has slowly gaining in presence.

    Listening room is my small home office 12x12 with 10 ft ceiling (small old house) so I do not listen at a very high volume at all. Typically around 50-60 db max. This equates to about 10 o'Clock on the volume knob for my bi-wired 88db Sensitivity rated Wharfedale 80th Anniversary Denton bookshelf speakers. At this volume as of this morning and another three hours of listening I have no audible noise. The sounds is smooth. Detailed....remarkably musical and dynamic. I have about 12 hours on the amp now. Particulalry the midrange and upper is very detailed but soft. Vocals are particularly...for lack of a better description, perfect. I cannot hear any issue with vocal presentations. They are rendered clear and natural, depending of course on the quality of the recording. Oscar Jerome's track Gravitate is one in particular that highlights that quality.

    The soundstage is wide and tall, and more open than my Class D amps I have been listening to. The sounds literally comes from behind me, above, and behind the amp. You are transported to the room with the musicians in some recordings.

    Temp wise, the amp is quite warm but not hot. I would not touch the tubes. (I never do without them cool and wearing gloves). Given that heat increases resistance I wonder about high room ambient temperature and the amp's performance. Here in the northern U.S. I don't have much worry about that but might consider a small noiseless fan to move air over the amp. So far listening the amp sounds it's best after it warms up but I notice it does work a bit harder. Something to watch if the room is in the upper 70's.

    I also use a 4 band EQ from Bellari in the audio chain between the amp and pre-amp. (because of the dual purpose nature of the FOSI preamp, phono and line in pre-amp)

    Many commented that using a pre-amp really makes this amp shine. I concur. (I find the FOSI X2 a brilliant piece of kit and a perfect match for this amp DOUK/Nobsound makes a similar if not the same version as well I may buy one just to say this rig's power is all nobsound...)

    I put tape over the blue power LED. It is overly bright. Replacing it with a red jewel light would be a nice upgrade. If possible. the volume knob and power toggle both feel solid. The volume is notched.

    Esoteric Sound Impressions

    Overall thus far I feel this amp is presenting the recorded material in a rather musical yet transparent manner. It does not artificially bloom the bass and in many older recordings you will hear the kick drum where it should be...just above the bass guitar or double bass lowest frequencies. This observation may lead some to declare the amp lacks bass. I disagree. You are hearing what is truly there. Many old and modern speakers artificially bloom the lower frequencies purposely. Because....it is "all about da bass"...

    For a generation raised Hip-Hop and EDM in cars with subwoofers that reach blocks, shake windows, crumbling mortar in chimneys and brick facades of old buildings...I can see where one might declare this amp lacks bass. I disagree. I hear plenty of bass right now.`See the spectrum screen shot and sampling sonogram of Jorja Smith's track, Rose Rouge. The bass extends to 30hz and the primary frequencies are clearly seen at in the pink sonogram. The sound of the electric bass notes and kick drum are well balanced with the rest of the track and are not lacking at all. The notes are rich and dynamic with a bouncy push tubes are known for. The Dentons are vintage voiced so they do roll off the top end a bit but they are also still breaking in.

    I purposely chose this tube amp for low volume listening in a small space with mid-sensitivity vintage voiced speaker like the Denton. The cost and point to point, tube rectified, two channel class A was what I wanted and was well within my budget.

    So is this amp a rock and roll power dream? No of course not.

    There were moments listening last night to Dr. Lonnie SMith's live album, Breathe that were (pun intended) breathtaking. Not only is that recording one of the best live recordings ever made, the amp brought it into my room. Marvelous....

    I have not listened to an vinyl yet. I am reserving that for after 30 hours of burn in. So far...I am delighted and quite impressed at this clever amp listening to it I get those gushy feels and I just ooze into the music.

    This amp...already is probably the best sounding amp I have had the opportunity to audition. (apart from some of my guitar tube amps which is not apples to apples.)

    More to come....
    Customer image
    Movie Fan
    5.0 out of 5 stars
    Audiophile Tube Rectified Class A sound in an Affordable Design

    Reviewed in the United States on April 25, 2021
    This will be a multi-part review as the amp burns in. I will edit the review over time.

    Part i - Unboxing, setup and integration with existing equipment and sound characteristics during initial 14 hours.

    Background

    This is my first tube HiFi amplifier. It is not my first tube amp. I have owned several guitar tube amplifiers and a Hammond M3 Organ which had a tube amp inside it. I am very familiar with guitar tube amps having owned and played professionally over 35 years. I know how tubes are suppose to sound and can recognize the various differences in tubes by different manufacturers and age. I have also modified guitar tube amps.

    Arrival

    The box was simple and heavily taped. The amp came bagged and taped and was suspending in a framework of foam. The tubes were bubble wrapped individually and inside a bubble wrap bag then tapped to the amp bag.

    The inside of the box and amp itself smelled of chemicals. I understand this to be insecticide commonly used in industrial shipments from China.

    The Tubes shipped were 4 Chinese 6P1 two marked 81.4 and two marked 80.4 one had "J 06" in white hand drawn in a diamond. I Split the pairs to keep both sides equal. 80.4 in front, 81.4 in back. The rectifier tube is a Chinese 5U4C. Power Tubes (2 ea) are Chinese 68HC.

    After full tube burning I do intend to roll power and pre-amp tubes. The Rectifier tube I am going to leave alone. As it appears the manufacturer swapped the stock 5Z4P tube for the 5U4C. There were some failures noted a few years back that may have facilitated this change. I am adding a APC LE1200 voltage regulator set to 110 volts. (a good thing to do for this amp in this old house) Read Stephe Koontz review for more info on tubes and mods she has made.

    No manual. Tube install was easy. I wore white gloves when handling the tubes and gently pushed them into place.

    The insecticide smell goes away after a day or two.

    On power up I let the amp warm up and settle in for about an hour before sending it a signal.

    Set Up and Initial Sound Quality

    I am using a Fosi Box X2 Phono /Line Pre-AMplifier with GE tubes. My initial signals I sent were from a Lenovo tablet running USB Audio Player Pro with Tidal and MQA enabled. Through a ifi HipDac to the FOsi pre-amp, signal splitting the output to monitor VU with DOUK audio LED VU meters configured L and R with peak hold (see picture). True to other reviewers the first several hours of music (playing a ambient playlist on Tidal) the audio was murky, and slightly muffled. After four hours I turned it off and came back later that night, and listened to MQA albums by Dr. Lonnie Smith and Crosby Still and Nash and some beaty electronic music. The sound was coming to life slowly. (fully expected) The highs and midrange came in first and the bass has slowly gaining in presence.

    Listening room is my small home office 12x12 with 10 ft ceiling (small old house) so I do not listen at a very high volume at all. Typically around 50-60 db max. This equates to about 10 o'Clock on the volume knob for my bi-wired 88db Sensitivity rated Wharfedale 80th Anniversary Denton bookshelf speakers. At this volume as of this morning and another three hours of listening I have no audible noise. The sounds is smooth. Detailed....remarkably musical and dynamic. I have about 12 hours on the amp now. Particulalry the midrange and upper is very detailed but soft. Vocals are particularly...for lack of a better description, perfect. I cannot hear any issue with vocal presentations. They are rendered clear and natural, depending of course on the quality of the recording. Oscar Jerome's track Gravitate is one in particular that highlights that quality.

    The soundstage is wide and tall, and more open than my Class D amps I have been listening to. The sounds literally comes from behind me, above, and behind the amp. You are transported to the room with the musicians in some recordings.

    Temp wise, the amp is quite warm but not hot. I would not touch the tubes. (I never do without them cool and wearing gloves). Given that heat increases resistance I wonder about high room ambient temperature and the amp's performance. Here in the northern U.S. I don't have much worry about that but might consider a small noiseless fan to move air over the amp. So far listening the amp sounds it's best after it warms up but I notice it does work a bit harder. Something to watch if the room is in the upper 70's.

    I also use a 4 band EQ from Bellari in the audio chain between the amp and pre-amp. (because of the dual purpose nature of the FOSI preamp, phono and line in pre-amp)

    Many commented that using a pre-amp really makes this amp shine. I concur. (I find the FOSI X2 a brilliant piece of kit and a perfect match for this amp DOUK/Nobsound makes a similar if not the same version as well I may buy one just to say this rig's power is all nobsound...)

    I put tape over the blue power LED. It is overly bright. Replacing it with a red jewel light would be a nice upgrade. If possible. the volume knob and power toggle both feel solid. The volume is notched.

    Esoteric Sound Impressions

    Overall thus far I feel this amp is presenting the recorded material in a rather musical yet transparent manner. It does not artificially bloom the bass and in many older recordings you will hear the kick drum where it should be...just above the bass guitar or double bass lowest frequencies. This observation may lead some to declare the amp lacks bass. I disagree. You are hearing what is truly there. Many old and modern speakers artificially bloom the lower frequencies purposely. Because....it is "all about da bass"...

    For a generation raised Hip-Hop and EDM in cars with subwoofers that reach blocks, shake windows, crumbling mortar in chimneys and brick facades of old buildings...I can see where one might declare this amp lacks bass. I disagree. I hear plenty of bass right now.`See the spectrum screen shot and sampling sonogram of Jorja Smith's track, Rose Rouge. The bass extends to 30hz and the primary frequencies are clearly seen at in the pink sonogram. The sound of the electric bass notes and kick drum are well balanced with the rest of the track and are not lacking at all. The notes are rich and dynamic with a bouncy push tubes are known for. The Dentons are vintage voiced so they do roll off the top end a bit but they are also still breaking in.

    I purposely chose this tube amp for low volume listening in a small space with mid-sensitivity vintage voiced speaker like the Denton. The cost and point to point, tube rectified, two channel class A was what I wanted and was well within my budget.

    So is this amp a rock and roll power dream? No of course not.

    There were moments listening last night to Dr. Lonnie SMith's live album, Breathe that were (pun intended) breathtaking. Not only is that recording one of the best live recordings ever made, the amp brought it into my room. Marvelous....

    I have not listened to an vinyl yet. I am reserving that for after 30 hours of burn in. So far...I am delighted and quite impressed at this clever amp listening to it I get those gushy feels and I just ooze into the music.

    This amp...already is probably the best sounding amp I have had the opportunity to audition. (apart from some of my guitar tube amps which is not apples to apples.)

    More to come....
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  • A. Seltzer
    4.0 out of 5 stars A true tube amp with high quality to value
    Reviewed in the United States on December 19, 2020
    Verified Purchase
    I’ve only had this amp for a bit less than one month as I write this review, but that may be enough to capture some impressions for anyone else interested in this product. I considered this amp for quite a while against some other amps in this general category and above, particularly the Reisong A10. I had also bought some other Nobsound/Douk Audio products on 鶹 with good results. This amp continued to stand out as a strong value and seemed like a safe choice. I have not been disappointed.

    I have been resisting the temptation to roll the tubes and have stayed with the supplied tubes so far, in the interest of giving the tubes due time to break in. My initial impressions will be based on using the stock tubes, which seem to be decent but I do expect to roll the tubes eventually based on consensus of using US 6SN7s for the input tubes and Russian 6P1Ps for the output tubes. Interestingly, Nobsound chose to provide a Russian 6H8C for the input tubes which are well regarded. Also note that this amp uses tube rectification, which is unusual for an amp in this price class. I’m not clear on how much the rectification tube affects the sound but tube rectification keeps this amps as a true tube amp and s generally only found on more expensive tube amps.

    The fist thing I notices on unboxing was the heft of the unit relative to its fairly small footprint, owing to the weight of the transformers. Build quality is impressive as has been the case with other Douk products that I own. Otherwise the presentation is nothing elaborate - just the amp, a power cord, and carefully packaged tubes are included. There was an odd smell of newness upon unboxing but this dissipated with the first use. There is no owner’s manual and no indication on the amp as to which tubes go where. However, looking at a picture on 鶹 is all the guidance one needs to install the tubes. The rear panel connectors, fairly standard for Douk products, are high quality. The front panel volume knob has a nice machine feel to it, is sized well, and moves in stepped intervals. The power switch is larger than expected and also has a robust, quality feel to it with very positive actuation. The amber backlit VU meters are also a quallity touch and seem to work well. As others have mentioned, the power LED is very bright and curiously blue in color. I’m not sure why Nobsound didn’t opt for an amber LED to match the VU meters and tube glow, or even chose to include a power LED at all since it is not really necessary given the VU meters and tube indication that the amp is on. Quite frankly, over time I have not found it to be much of an issue. Being a class A SET amp, this amp gets very hot and radiates heat during operation, as expected. Being that no cover is supplied, it is advisable to keep this amp on a location where it cannot be touched.

    Sound quality matches up with my favorable impression of the overall build quality. While some may wonder if 6.8 watts is adequate, with my 98 dB efficient speakers, it is well adequate. With the volume know at roughly half way of its full travel, this amp plays loud. Power is just not an issue but, as with any low power SET amp, satisfaction is contingent upon using efficient speakers. I may eventually try this amp with other less efficient speakers as a curiosity but I bought this amp specifically for these high efficiency speakers. Sound is strong, articulate, detailed, and punchy. If there is one characteristic that stands out relative to other tube amps that I have experimented with, this amp has a very clear and neutral sound unlike the warm dark coloration I have come to associate with tubes. In that regard, the sound seems to have the bass bloom characteristic of tubes with a more neutral midrange. Highs have a bell like quality without being too forward or harsh. For guitar players out there, a tone wood analogy I would use is that, where most amps offer a complexity akin to rosewood, this one sounds more like mahogany. Considering my preference for the clarity of mahogany guitars, this character in an amp is favorable to me. Imaging is pinpoint with good center fill between the speakers. There is no noticeable hum and moments between songs are silent. In short, this amp does everything well thus far in my short ownership experience. I expect sound to improve somewhat given that I have only perhaps 100 hours or so on the tubes so far. The tubes are probably still breaking in. I also expect to eventually roll them as indicated above, with the expectation of taking the sound to a higher level, but that is yet to be determined. For right now, I am experiencing a level of sound that command my recommendation of this product to anyone who might be considering this amp. For completeness I should also mention that I am using a vintage Counterpoint tube preamp going into the Nobsound and an FX-Audio DAC going into the preamp. Since the Nobsound is an integrated amp, the use of a preamp is not necessarily required but may factor into my favorable impressions. All of my listening has been via streaming, much with high definition audio via 鶹 Music HD, direct connected over USB and also using Bluetooth.

    Compared to an even lower powered but surprisingly great sounding Miniwatt N3 SET amp, the Nobsound has a different character. Again, it is one of neutrality where the Miniwatt seems to have more of that dark tubey tone. I have not A/B compared the two, nor do I intend to get too involved in such comparisons at the expense of just sitting down to enjoy music. Many reviews of the Miniwatt, also sold under the name APPJ or Tube Cube are available as a product that may be of interest to the Nobsound customer. Bear in mind that at 3.5 watts per channel, that product is only for the most efficient of speakers where the Nobound is considerably more powerful with its 6.8 watts. Suffice it to say that the Nobsound comes across as high quality and perhaps merits comparison with some higher priced gear. My adventures in Chinese made high fidelity gear has taught me that high quality is possible at tenable costs where early on in my pursuit of high fidelity in the 80s, a tube amp such as the Nobsound was just not an option. The caliber of sound I am getting would have required a substantially greater investment. The law of diminishing returns seems to be very much in play, to my ears, in audio. For the cost of the Nobsound, I believe most would find the value to be high, as do I. Consider my impressions to be preliminary given my short period of ownership, but this amp is meeting all of my expectations so far as a quality, high value product. I must also underscore that these results are predicated on use with a high quality, high efficiency speaker. With that context, the Nobsound does everything it promised well and begs for comparison with other tube amps on the market. As far as I can tell, this product comes in at a price to quality ratio that is unique, for a true tube amp with tube rectification, hand soldered point to point wiring, a quality of build that seems destined to last, delivering the detail and presentation expected of a tube amp.
  • Jerzy Bonden
    1.0 out of 5 stars It's absolute junk.
    Reviewed in the United States on August 28, 2022
    Verified Purchase
    Junk. I doubt the power rating... seemed like less than half of the 6.8 watts advertised. No bass whatsoever. Limited soundstage. Limited dynamics. It's repackaged 1950's tube technology. Mid-fi at best.

    For $300.00, you could do much better elsewhere. Where? Google search Nelson Pass' Amp Camp Amp - truly high end and a real bargain.
  • charlie Dixson
    5.0 out of 5 stars Great inexpensive tube amplifier for beginners
    Reviewed in the United States on November 8, 2020
    Verified Purchase
    I’m 70 years old and have had tube systems all my life. They sound so much better than solid state systems. (I dabbled with solid state for a short time back in the very early 70’s but quickly realized it wasn’t for me). I currently own three tube/analog systems but wanted to add a system to my bedroom. I didn’t want to spend a lot but did want something that had a little bit of “oomph” to it power wise. This Nobsound fills the bill. Don’t let the 6.8 wpc fool you. (Tube watts are different from solid state. These 6.8 would be the equivalent of 35 wpc solid state and since most people only listen to 1-3 max at normal listening levels, 6.8 wpc is more than enough). Connect it to very efficient speakers (in my case Bic America Formula FH-65B bookshelf’s rated at 96dB sensibility) and it will fill any listening space with exquisite music. I only have to turn the volume to the 9:00 position and it easily fills my entire upper floor.
    Tubes do need a break in period of 50-100 hours before they sound their best. My usual process with a new amp (or new tubes for one of my existing amps) is to play it at normal listening levels for 14-16 hours a day for a week. When I first turned on the Nobsound the bass was muddy, the mids were not all that clear, and the high were very bright and harsh. I then broke in the tubes and did my critical listening. The tubes came alive. The bass was deep but not boomy, the mids cleared up nicely, and the highs settled down to where they were not as harsh. If I wasn’t a “tube roller” I would be happy with the way it sounds. But I am a tube roller. I replaced the stock 5U4 rectifier tube with an Electro-Harmonix 5U4GB, the stock 6P1 tubes with Sovtek 6P1P-EB power tubes, and the stock 6H8 pre-amp tubes with Tung-Sol 6SN7-GTB pre-amp tubes, did my normal tube break-in process, and then critical listening. Man, oh man!!! What a difference!!! The sound stage opened up even more with even better stereo separation and “3D” effect. Yes, I was happy with the stock tubes after they were broken it. But that’s what’s nice about tubes. You can change the “flavor” of the music by simply swapping in different tubes.
    If you have toyed with the idea of dipping your toes into the world of tube amplification and discover the pleasures it will bring you over the sound of solid state, this is the one to start with. It is a well built, good quality, and great sounding amp that will not break the bank. It will open a whole new world of listening pleasure to your ears.

    And for the one member who likes to troll reviews like this and state Chinese amps are junk with poor quality control. All my amps are from China and I have never had any problems with them in all the years I have owned them. There will always be good and bad in any product line out there in the world today, no matter where it is manufactured. And I am still happy that you are happy with your Jolida. Please allow us to be happy with our Chinese “junk”!!!

    I would also like to add that even though I am an analog/vinyl lover, it is not possible to have an analog system at my part tine job. I have several of my favorite albums/artist downloaded on my Tidal account and stream them through my iPad pro while working. I use the built in iPad DAC and speakers. When I get home, I run my iPad through a Soundavo HP-DAC 1 (read mine and other peoples reviews on this great piece of equipment) that I have integrated into my Nobsound in my bedroom. The combination produces music that sounds exceptional. I read that stand alone DAC’s are so much better than built in DAC’s and that is so very true. I like to fall asleep at night listening to Classical or Jazz music. Lying there in bed I am hearing notes and instruments from favorite recordings I never picked up on before. The Soundavo makes the music seem like I am sitting in the audience at a live concert. The Soundavo combined with the warmth, depth, and clarity of the Nobound makes for a great inexpensive beginners foray into a truly wonderful listening experience.

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