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Product description

48V PSU Version Douk Audio A5PRO Bluetooth Amplifier

300W×2 Power, TPA3255 Chip

Dual-channel audio with Class D PFFB tech for theater-grade sound.

Reset Button & Seamless Pairing

Stable wireless connectivity for desktop and bedroom setups.

Tempered Glass Access Panel

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

4-Layer Gold PCB Design

Reduces distortion by 30% while optimizing heat dissipation.

Adjustable RGB Lighting

Modern transparent panel with multi-color ambiance control.

1 HiFi Stereo Amp

2 Upgraded Bluetooth 5.1

3 Op-Amp Customization

4 PFFB Tech Precision

5 LED Visual Design

Headphone + Speaker + AUX

Speaker, AUX, and headphone outputs operate simultaneously with unified volume/treble/bass control.

Analog Adjustment Knobs

Fine-tune frequencies for movies, music, or gaming.

Post-Filter Feedback Circuitry

4-layer immersion gold PCB minimizes signal loss (0.01dB).

Aluminum Chassis + Ventilation

Sustains ≤45°C operation at 300W×2 continuous output.

Rubycon/WIMA Capacitors

Enhanced signal clarity across 20Hz-20kHz frequency range.

1 Three Audio Outputs

2 Bass/Treble Control

3 4-Layer Gold PCB Design

4 Great Heat Dissipation

5 Premium Components

300W×2 Drives Passive Speakers

Enhance movie nights with theater-grade bass control.

Bluetooth 5.1 + Headphone Output

Wirelessly stream music from your PC and phones.

PFFB-Enhanced Signal Clarity

Critical listening setup for producers with 20Hz-20kHz flat response.

RGB Lighting + Dual Outputs

Simultaneously power bookshelf speakers and low-latency gaming headsets.

1 Home Theater Upgrade

2 Desktop Audiophile

3 Studio Monitor Control

4 Gaming Battle Station

5 Circuit Design Schematic

1 LAB Test 1

2 LAB Test 2

3 Front

4 Back

5 Top

Parameters

Audio input: Bluetooth / Stereo RCA Audio output: Banana speaker jacks / AUX / 3.5mm headphone jack Headphone output power: 500mW/32Ω Matched headphone impedance: 16-600Ω Max. output power: 300W*2 (4Ω) Matched speaker impedance: 4-8Ω Frequency response: 20Hz-20KHz (±1dB) THD+N: 0.003% SNR: ≥113dB Bass/treble range: ±6dB Bluetooth version: 5.1 RCA input sensitivity: 2V AUX rated output level: 3.7V Working voltage: DC 24-48V Dimensions (W*D*H): Product: 130*112*33mm / 5.12*4.41*1.30in; Package: 265*240*65mm / 10.43*9.45*2.56in Weight: Net: 525g / 1.16lb; Package: 1.2kg / 2.65lb

Douk Audio & Nobsound Recommendation

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Customer Reviews

4.6 out of 5 stars 9

4.6 out of 5 stars 84

4.4 out of 5 stars 396

4.2 out of 5 stars 284

3.6 out of 5 stars 4

4.2 out of 5 stars 349

4.2 out of 5 stars 449

Price

$139.99$139.99

$99.99$99.99

$109.99$109.99

$99.99$99.99

—

$70.00$70.00

$139.99$139.99

Type

2-CH Bluetooth Digital Amp

2-CH Digital Amplifier

2-CH Bluetooth Tube Amp

2-CH Bluetooth Phono Amp

2.1-CH Bluetooth Digital Amp

4-CH Bluetooth Digital Amp

Ampliifer / Speaker Switch

Bluetooth

✔

✘

✔

✘

Tone control

✔

✘

✔

✘

Audio input

Bluetooth / Stereo RCA

Stereo RCA

BT/PC-USB/COAX/OPT/RCA/U-disk

Bluetooth/RCA/MM phono

Bluetooth/RCA/AUX

Bluetooth/RCA/AUX/U-disk

Ampliifer

Audio output

Speaker / AUX / Headphone

Speaker / AUX

Speaker / Line Out

Speaker

Output power

300W*2 (4Ω) / 500mW(32Ω)

300 watts x2

100W*2 (4Ω)

300W*2 (4Ω)

300W*2 (L/R)+300W (subwoofer)

50W*4 (4Ω load)

Max. 350W Supported

Frequency response

20Hz-20KHz (±1dB)

20Hz-20KHz (±0.7dB)

20Hz-20kHz(±1dB)

20Hz-20KHz (±1dB)

20Hz-20kHz

20Hz-20KHz(±3dB)

–

THD

0.003%

0.002%

0.07%

0.02%@1KHz

0.01% (1kHz)

0.05%(1kHz 1W)

–

SNR

≥113dB

114dB

≥98dB

≥107dB

≥108dB

≥98dB

–

Package Dimensions ‏ : ‎ 10.04 x 8.46 x 2.72 inches; 1.12 Pounds
Item model number ‏ : ‎ A5 PRO 48V
Date First Available ‏ : ‎ March 27, 2025
Manufacturer ‏ : ‎ Douk Audio
ASIN ‏ : ‎ B0F2M9P24C
Best Sellers Rank: #100,469 in Electronics (See Top 100 in Electronics) #666 in Audio Component Amplifiers
Customer Reviews: 4.6 4.6 out of 5 stars 9 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); } }); });
Upgraded Features for Versatile Use: The A5 PRO builds on the strengths of the A5, featuring upgraded Bluetooth 5.1 connectivity with a reset button, bass and treble knobs for precise tone adjustments, and a headphone output. It delivers clear, powerful audio, perfect for diverse uses from bedroom movies to desktop setups.
Easy Customization with Plug-and-Play Op-Amps: Upgrade your sound effortlessly! Douk Audio A5 PRO 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.
Impressive Power Output: The A5 PRO delivers a maximum output of 300W×2 with TPA3255, perfect for driving high-power systems, and 500mW@32Ω for detailed, dynamic headphone listening. With premium components like Rubycon/WIMA capacitors, it ensures optimal performance with bookshelf speakers and other devices.