User Manual of Douk Audio A5 PRO

Warm tips：

• The A5 PRO with 2PCS pluggable NE5532 op-amps, can be upgraded by dual op-amps like 2134/2604/5532/2068/muse02 etc.
• The speaker output, AUX and 3.5mm headphone jack output can work at the same time, and the volume/treble/bass of the three outputs are controlled simultaneously.

• 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.

• Brand: Douk Audio
• Model: A5 PRO
• 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): 130*112*33mm / 5.12*4.41*1.30in
• Package dimensions (W*D*H): 265*240*65mm / 10.43*9.45*2.56in
• Net weight: 525g / 1.16lb
• Package weight: 1.2kg / 2.65lb

Power Output Table of Douk Audio A5 PRO