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Product description

48V PSU Version 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

1 High-Pass Filter

2 Replaceable Op-Amp

3 Glass Panel

4 Ambient Lighting

5 TPA3255 Core Chip

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.

This version adopts 48V 5A power supply.

1 PFFB Technology

2 4-Layer PCB

3 Superior Heat Dissipation

4 Premium Components

5 Power Output Table

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
1 2-CH Hi-Fi Stereo System

2 2.1-CH Surround Sound

3 Home Theater Setup

4 Studio or Workspace

5 Audio Enthusiasts and DIY

1 Elegant Design

2 Front

3 Back

4 Side

5 Top

Parameters

Audio input: Stereo RCA Audio output: Banana speaker jacks / 3.5mm AUX HPF 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 × 50mm / 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: 1.1kg / 2.43lb Packing list: 1 * A5 Amplifier; 1 * DC 48V/5A Power Adapter; 1 * User Manual

Douk Audio & Nobsound Recommendation

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Customer Reviews

4.6 out of 5 stars 89

4.6 out of 5 stars 9

4.2 out of 5 stars 349

4.0 out of 5 stars 469

4.4 out of 5 stars 322

4.4 out of 5 stars 34

4.3 out of 5 stars 450

Price

$88.99$88.99

$119.99$119.99

$79.99$79.99

$149.99$149.99

$59.99$59.99

$99.99$99.99

$127.99$127.99

Type

2-CH Digital Amplifier

2-CH Bluetooth Digital Amp

4-CH Bluetooth Digital Amp

2-CH Bluetooth Phono Tube Amp

Tube Phono Preamp

Digital Equalizer

Speaker / Amplifier Switch

Input

Stereo RCA

Bluetooth / Stereo RCA

Bluetooth/Stereo RCA/U-disk

Bluetooth/Stereo RCA/MM Phono

MM Phono / 3.5mm AUX

RCA / Balanced XLR

Amplifiers

Output

Banana speaker jacks / AUX

Speaker jacks/ AUX/ headphone

Speaker sockets

Banana jacks / Single RCA

RCA / 3.5mm headphone jack

RCA / Balanced XLR

Speakers

Power

300 watts x2

50 watts x4

160 watts x2

150mW@32Ω (headphone)

–

Support Max. 350W

THD

0.002%

0.003%

0.05%

0.5%

0.2%

0.003%

–

SNR

114dB

≥113dB

≥98dB

>90dB

≥105dB

≥104dB

–

Frequency Response

20Hz-20KHz (±0.7dB)

20Hz-20KHz (±1dB)

20Hz-20KHz(±3dB)

–

20Hz～20KHz(±1dB)

–

Tone Control

✘

✔

✘

✔

✘

✔

Feature

High Pass Filter + PRE Out

3 Simultaneously Outputs

Multi-Channel Audio System

Phono Input

Phono Input + Headphone Output

7-Band (-6dB to +6dB)

VU Meter Audio Switch

Product Dimensions ‏ : ‎ 3.62 x 1.97 x 3.74 inches; 1.12 Pounds
Item model number ‏ : ‎ A5-48V
Department ‏ : ‎ All Ages / Unisex
Date First Available ‏ : ‎ March 20, 2025
Manufacturer ‏ : ‎ Douk Audio
ASIN ‏ : ‎ B0F22FN8Z8
Best Sellers Rank: #29,790 in Electronics (See Top 100 in Electronics) #146 in Audio Component Amplifiers
Customer Reviews: 4.6 4.6 out of 5 stars 89 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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.