Douk Audio A5 Class D 2.0 Power Amplifier

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

 

The Douk Audio A5 Class D 2.0 Power Amplifier is a compact yet powerful HiFi amplifier designed for users who want high-fidelity sound performance, modern tuning flexibility, and audiophile-grade customization in a small desktop-friendly form. Built around the high-performance TPA3255 Class D amplifier chip, it delivers clean, dynamic, and distortion-free sound suitable for home stereo systems, desktop setups, and small theater environments.

 

High-Performance TPA3255 Class D Amplification

At the core of the Douk Audio A5 is the Texas Instruments TPA3255 chip, one of the most respected Class D amplifier chips in the HiFi world.

Key Amplification Features

• Texas Instruments TPA3255 high-efficiency chip

• Advanced Class D digital amplification architecture

• Ultra-low distortion audio output

• Stable performance under high power loads

 

Features

• 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.

 

Parameters

• 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

 

Frequently Asked Questions (FAQs)

What is Douk Audio A5 used for?

It is used for powering HiFi speakers in home audio, desktop, and small theater systems.

Does it support Bluetooth?

No, it uses wired RCA input for stable HiFi sound.

What is special about the HPF feature?

It allows users to adjust bass cutoff between 30Hz and 200Hz for better clarity.

Can I upgrade sound quality?

Yes, it supports plug-and-play op-amp upgrades.

How powerful is it?

It delivers 300W × 2 output at 4Ω.

Is it suitable for bookshelf speakers?

Yes, it is optimized for bookshelf and passive speakers.

What is the distortion level?

It has ultra-low THD+N of 0.002%.

Does it require a large setup space?

No, it is compact and ideal for small spaces.