Douk Audio A7 Multi-Channel HiFi Bluetooth Amplifier 2.1/2.2/3.0/4.0

Features

Five Speaker Setups from One Amplifier: Go beyond traditional stereo and make more of your existing speakers. The versatile multi-channel amplifier supports 2.0, 2.1, 2.2, 3.0, and 4.0 configurations, with Speaker Output 2 switchable between stereo/mono and full-range/low-pass modes. Add another speaker pair or subwoofers as your HiFi system evolves.

Dual TPA3255 Power with PFFB Precision: Two TI TPA3255 chips independently drive Speaker Outputs 1 and 2, delivering up to 120Wx4 in 4.0 setups or 120Wx2 + 270W in 2.1 setups. The VICE Power input accepts an additional supply to support higher power demands, while PFFB technology helps reduce distortion for cleaner playback.

Master Your Subwoofer Integration: Drive up to two passive subwoofers directly without a separate subwoofer amplifier, or connect a powered sub through the dedicated SUB OUT with fixed 200 Hz LPF. Adjustable 30–200 Hz HPF and LPF separate main speaker and passive subwoofer frequencies for smoother bass integration.  

HDMI ARC and Balanced HiFi Connectivity: Bring TV shows and movies to life through your HiFi speakers via HDMI ARC. Balanced XLR/TRS combo inputs reject interference for cleaner signal transmission, while the Qualcomm QCC304X brings Bluetooth 5.2 and aptX HD for high-quality wireless playback. RCA inputs connect traditional analog sources.

HiFi Clarity Meets Practical Design: With THD+N of 0.002% and SNR ≥114 dB, A7 delivers clean, low-distortion sound. Bass/treble adjustment, independent passive subwoofer volume, and 12V Trigger add everyday convenience, while the generously sized aluminum chassis and heatsink help dissipate heat more effectively during demanding playback.

Parameters

● Brand: Douk Audio

● Model: A7

● Amplifier Chips: 2 × TI TPA3255

● Audio Inputs: HDMI ARC / Bluetooth 5.2 / Stereo RCA / Balanced XLR/TRS

● Audio Outputs: Speaker Output 1 / Speaker Output 2 / SUB OUT

● Speaker Output 2 Modes: Full-Range / SUB LPF; Stereo / Mono

● Speaker Impedance: 4–8Ω

● Frequency Response: 20 Hz–20 kHz (±0.7 dB)

● THD+N: 0.002%

● SNR: ≥114 dB

● HPF Crossover: 30–200 Hz (Adjustable)

● LPF Crossover: 30–200 Hz (Adjustable)

● SUB OUT LPF: Fixed at 200 Hz

● Input Sensitivity: RCA 2 V / XLR 4 V

● Bass/Treble Adjustment: ±6 dB

● Bluetooth Chipset: Qualcomm QCC304X

● Bluetooth Codecs: SBC / AAC / aptX / aptX HD

● HDMI ARC Audio Format: 2-Channel PCM (Stereo)

● Operating Voltage: DC 24–48 V (5.5 × 2.5 mm)

● 12V Trigger Input: 3.5 mm TS

● Dimensions (W × D × H): 225 × 160 × 53 mm / 8.86 × 6.30 × 2.09 in

● Package Dimensions (W × D × H): 393 × 240 × 80 mm / 15.47 × 9.45 × 3.15 in

● Net Weight: 1.75 kg / 3.86 lb

● Package Weight: 2.53 kg / 5.58 lb

A7 Output Power by Configuration

Packing List

● 1 × A7

● 1 × DC 48V/5A GaN Power Adapter

● 1 × Bluetooth Antenna

● 1 × 3.5mm Trigger Cable

● 1 × User Manual