A07 MAX 600W TPA3255 Home Audio Power Amplifier

A compact amp that drives your passive speakers with real, clean power.

The AIYIMA A07 MAX runs on a TPA3255 Class D chip and gives you 300W x2 in stereo or up to 600W in PBTL mono mode (at 48V/12A). That's enough headroom for living rooms, media rooms and entertainment spaces. It holds a low distortion figure of THD+N 0.007% across a 20Hz-20kHz response (+/-1dB), so detail stays intact from bass to treble. It takes DC 24-48V supplies rated 5A or higher, has input sensitivity of 1V and SNR of at least 110dB, and includes a 3.5mm AUX OUT that passes signal without volume control to feed an active subwoofer or a second amp.

Why we picked it

• Two power modes - 300W x2 stereo or 600W mono to match your room and speakers.
• Clean output - low distortion, wide response and high SNR keep playback quiet and detailed.
• Tinker-friendly - swappable op-amps and an AUX OUT let you shape and expand the system.

Good to know

Op-amp chips are replaceable and compatible with OPA2604AP, OPA2134, MUSE02, LME49720NA, LM4562, AD827AQ and others. LED indicators show power and status, and front-panel volume and tone controls adjust bass, treble and level. The box includes one A07 MAX unit and a matching power adapter (32V 5A, 36V 6A or 48V 5A depending on the option you choose), plus an 18-month warranty.

Common questions

Q: Everything is connected but there's no sound. What should I check?
A: Confirm the amp is on and the indicator is lit, verify you picked the right mono or stereo mode, check the speaker wiring, and make sure the source is playing and not muted.

Q: Why does it distort at high volume?
A: That usually happens when both the source and the amp sit near maximum. Turn one of them down to keep the input level in range.

Q: Why does volume change when I switch sources like CD and phone?
A: Devices output different signal levels. Many phones put out around 0.35V while CD players sit near 1V, so loudness differs at the same amp setting.

Q: What causes a hum or buzz from the speakers?
A: Often a noisy power supply or unshielded cables. Try a quality supply and shielded audio cables. Disconnect all inputs to isolate the source; if the noise clears, it came from the cabling or source.