Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter
Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter

Douk Audio A5 TPA3255 Stereo Amp HiFi Audio Class D Amplifier High-pass Filter

$72.99
Features                  
  • Adjustable High-Pass Filter
  • Plug-and-Play Op-Amps
  • PFFB Technology & High-Performance PCB
  • Stunning Design for Living Rooms and Studios
  • TPA3255 Chip
Power Supply
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Free Shipping

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2-8 Days Arrival

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30-Day Return

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2-Year Warranty

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User Manual of Douk Audio A5 (New)
User Manual of Douk Audio A5 (Old)

Warm tips:

The A5 with 2PCS pluggable NE5532 op-amps, can be upgraded by dual op-amps like 2134/2604/5532/2068/muse02 etc.

  • HiFi Sound with Adjustable High-Pass Filter: This TPA3255 amplifier features an adjustable high-pass filter (HPF) 30-200Hz to refine mid-high frequencies while minimizing low-frequency interference. Perfect for bookshelf or passive speakers, it enhances clarity and creates a dynamic soundstage ideal for home stereo and theater audio systems.
  • Easy Customization with Plug-and-Play Op-Amps: Upgrade your sound effortlessly! Douk Audio A5 includes a tempered glass access panel for quick op-amp replacements, allowing audiophiles to tailor sound profiles without disassembling the unit.
  • PFFB Technology and High-Performance PCB: Built with Post-Filter Feedback technology circuit and a 4-layer immersion gold PCB, this digital amplifier reduces distortion and improves frequency response. Enjoy unparalleled audio precision, enhanced signal integrity, and effective heat management.
  • Stunning Design for Living Rooms and Studios: Sleek and modern, the compact power amp is equipped with a transparent panel and adjustable internal LED lighting. Multiple color options create a futuristic look, adding sophistication to your home audio setup or studio.
  • 300W×2 Power with Premium Components: Powered by the TPA3255 chip and premium components, A5 delivers distortion-free audio with ultra-low THD (0.002%) which is perfectly compatible with the DAC-Q11. Whether you’re enjoying weekend movie nights, evening music sessions, or after-work relaxation, A5 can deliver exceptional sound quality.
  • Brand: Douk Audio
  • Model: A5
  • Audio input: Stereo RCA
  • Audio output: Banana speaker jacks/3.5mm AUX
  • High-pass filter adjustment range: 30Hz-200Hz
  • Max. output power: 300W*2 (4Ω)
  • Matched speaker impedance: 4-8Ω
  • THD+N: 0.002%
  • SNR: ≥114dB
  • Input sensitivity: 2V
  • AUX rated output level: 3.7V
  • Frequency response: 20Hz-20kHz (±0.7dB)
  • Working voltage: DC 24-48V
  • Dimensions (W*D*H): 95*92*50 / 3.74*3.62*1.97in
  • Package dimensions (W*D*H): 265*240*65mm / 10.43*9.45*2.56in
  • Net weight: 506g / 1.12lb
  • Package weight(with 32V5A power supply): 1100g / 2.43lb
  • Package weight(with 48V5A power supply): 1200g / 2.65lb

Power Output Table of Douk Audio A5

Power Supply

Speaker Impedance

Rated Output Power

32V/5A

78W+78W

32V/5A

71W+71W

32V/5A

65W+65W

36V/6A

107W+107W

36V/6A

100W+100W

36V/6A

94W+94W

48V/5A

120W+120W

48V/5A

110W+110W

48V/5A

102W+102W

48V/10A

250W+250W

48V/10A

210W+210W

48V/10A

185W+185W

  • A5 Amplifier ×1 
  • DC 32V/5A Power Adapter(Optional) ×1 
  • DC 48V/5A Power Adapter(Optional) ×1
  • User Manual ×1

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Douk Audio A5 Stereo Budget Amplifier Review

Douk Audio A5 Digital Amplifier

TPA3255 | High-Pass Filter | Op-Amp Rolling | PFFB | Glass Panel

Precise Low-Frequency Control

Adjustable 30Hz-200Hz high-pass filter for precise bass control and improved sound quality.

Customize Your Sound

Supports NE5532 op-amp replacement with models like 2134 or 2604 for personalized audio tuning.

Premium Transparent Design

Equipped with a tempered glass cover, showcasing internal components with elegance and durability.

Stylish Blue LED Accent

Built-in soft blue ambient light creates a high-tech vibe while enhancing visual comfort.

Efficient High-Power Amplification

Powered by TI’s TPA3255 chip, delivering 300W per channel to drive various speaker types.

Enhanced Dynamic Performance

Utilizes PFFB (Pure Feed-Forward) technology to minimize distortion and improve dynamic sound.

Stability and Efficiency

High-precision 4-layer PCB design ensures stable signal transmission and efficient heat management.

Quiet and Efficient Cooling

Optimized heat sink and structure design ensure stable operation during extended use.

High-Quality Build Materials

Features high-quality internal components for reliable performance and high-fidelity sound output.

Perfect for High-Fidelity Music Playback

Compatible with Active Subwoofers

Drive Your Living Room Tower Speakers

Ideal for Desktop Audio Setup

Perfect Match for Douk Audio Q11 DAC

Customer Reviews

Based on 24 reviews
79%
(19)
17%
(4)
4%
(1)
0%
(0)
0%
(0)
M
Matthew Joy
An Audiophile Game Changer

Not just great for the money! Audiophile Reference level out of the box, and once cheaply modified, beyond critique!Listen folks, I'm a nutty audiophile. I've heard and owned all sorts of amps, both tube and solid state, amps costing as much as 10k+. When I had to send an Enleum Amp23r (6.5k retail) to South Korea for servicing, based on chatter amongst respected audiophiles, I figured I'd experiment with this Douk amp. I paid my $120 for the 48v version. I also ordered Sparkos ss3602 Op Amps for $150. Before getting the op amps in, I was super impressed with the performance of the Douk, although it fell short of the best I'd owned, it was much better than most amps under 2kish in price! Mind you, I was and am still sourcing the Douk with a 5k DAC/Streamer called the Wattson Madison LE (designed and built in Switzerland). The modified Douk is totally up to the task of amplifying one of the best digital sources in the world! I've recently added a 1.5k, all analog preamp (Ladder Chopin) in front of the Douk, and that has proved a perfect match. The op-amp modified Douk is beyond critique!This is an unreal amp! It is my reference amp, and costs 1/8th the price of the speaker cables connected to it! WTF!

H
Happy audiophile
Bargain of the Century!

The Douk Audio A5 is my first foray into the intriguing new landscape of small class D amplifiers from China. As someone who got into "hi-fi" in the 1970s, I have always equated amplifier power with amplifier weight and size. Beefy power required heavy massive amplifiers. It was just an inarguable fact. Seeing the recent proliferation of these toy sized amplifiers definitely piqued my curiosity about whether these things could seriously be considered to be in the same league as traditional audiophile amps.I recently bought a pair of Elac Carina BS243.4 bookshelf speakers and found them to be power hungry. I had been using a Monoprice Pure Tube amp to drive them but the 10 watts per channel was insufficient to drive these speakers with any authority. I was looking for some additional clean power to be fed by the Monoprice amp (Love the sound of this amp!) working as a preamplifier, and wondered about one of these amps from Aiyima, Fosi, and Douk, etc. While I know the power ratings on these units are exaggerated, I was impressed with the measurements and reviews I saw online. With this Douk A5 on sale for only $85, I figured it was worth a shot.To say I was blown away by the sound of this amplifier is a huge understatement. The performance is incredible regardless of the price. When taking the price into account, it is truly absurd! In addition to the plentiful power, it managed to preserve the holographic imaging and soundstage of the Monoprice Tube amp. I remember reading some reviews that compared the Douk A5 favorably to multi-thousand dollar amplifiers, and thinking "Aw come on, that is ridiculous". Well I have now been thoroughly enlightened! I think there is a generational paradigm shift underway in the area of home audio amplifiers to the great benefit of audiophile consumers. These tiny class D amps with PFFB technology are the real deal!The only downside I can think of is the appearance of these amps are so cheap and toy like. You are not going to impress anyone with the looks of these as compared to a large, heavy, fancy, stylish, conventional class AB or class A amplifier. But how much are you willing to pay to impress people?I had ordered this with a standard 32V power supply and was curious what the performance increase would be like with the 48V power supply. So I ordered one. Performance was definitely raised a notch with more controlled and robust bass. I could really crank up the sound with the 48V power supply (71 watts @ 6 ohms -> 110 watts @ 6 ohms). However it makes the amp run HOT as the chassis serves as the heat sink. I removed the glass panel on top and replaced it with a piece of steel mesh but it is still very hot. Hopefully this does not affect the lifespan of the unit.Bottom line -This amp is a mind blowing value. As I listen to my system while I type this review, I am still having trouble reconciling the incredible sound I am hearing - with visual disconnect of seeing this tiny little unit being responsible for it.

D
Dayron Leito
Nice little amp

Nice little stereo amp with lots of power. Perfect speaker pairing is a must.

A
András Gyöngy
Getting gold for a pocketful of change

Surprisingly good overall performance, smmooth but powerful little amplifier. Used with a DIY linear (36V6A) power supply it produces a sound quality that is hard to beat even at 10 times the pice. Congratulations for the achievement!

C
Carlo V.
Great value for money

Stunning sound HiFi landscape

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