AIYIMA A07 TPA3255 Power Amplifier 300W x2 HiFi Class D 2 Channel Stereo Amp with Pre-Out Review (2026)

What it is

The AIYIMA A07 is a small desktop stereo amplifier built around the Texas Instruments TPA3255 class D amplifier chip, paired with an NE5532 dual op-amp in the signal path. It is rated for 300 watts per channel into a bridged configuration, with a stated total harmonic distortion under 0.03 percent and a signal-to-noise ratio around 110dB. The chassis measures roughly 151 by 100 by 33mm, small enough to sit on a desk or a shelf next to a turntable and receiver. It accepts a single stereo line-level input and drives passive speakers directly, making it a straightforward way to add real power to bookshelf or tower speakers without a full-size integrated amplifier.

Power output and the power supply catch

The 300 watts per channel figure is the chip's maximum rated output, and reaching anywhere near that number depends heavily on the external power supply used, since the amplifier board itself has no internal supply. Sold configurations commonly include a 32V 5A power adapter, and with that supply the amplifier's real-world output is closer to 80 watts at 4 ohms rather than the full 300 watts per channel. To approach the rated maximum output, a substantially larger supply such as a 48V 10A unit is needed, and that stronger supply is typically a separate purchase. This is worth understanding before buying, since a shopper expecting the printed wattage straight out of the box with the stock supply will be disappointed by the more modest real output.

Connections and use with passive speakers

The A07 includes a pre-out in addition to its speaker terminals, which lets you send a line-level signal onward to a powered subwoofer or a second amplifier for a more elaborate system, a feature not every budget class D board offers. It is built to drive passive bookshelf or tower speakers rated between 4 and 8 ohms, and its frequency response is specified across 20Hz to 20kHz. There is no phono input on this amplifier, so a turntable needs its own separate phono preamp, either built into the turntable or as a standalone box, before its signal reaches the A07's line input. Gain is rated at 21.5dB, which is a moderate figure that should suit most line-level sources without excessive noise floor.

Build and size

Class D amplifier designs like the TPA3255 run efficiently and generate relatively little heat compared with older class AB amps of similar power, which is part of why the A07's chassis can stay so compact without a large heatsink or cooling fan. That efficiency also makes it a reasonable choice for a desk or a media shelf where a large integrated amplifier would not fit comfortably. Build quality centers on the amplifier board itself rather than an elaborate metal chassis, which keeps the price down but means the unit feels more like a component board in an enclosure than a heavy traditional receiver. Buyers who want a substantial, weighty amplifier chassis should look elsewhere, since this design prioritizes compactness and price over heft.

Who it suits

This amplifier suits anyone building a compact vinyl or line-level system around passive bookshelf or tower speakers who wants meaningful power without a bulky receiver, provided they already have or plan to buy a separate phono preamp for their turntable. It is a good fit for desks, small living rooms, or secondary systems where space is limited but real speaker output still matters. Buyers chasing the full advertised 300 watts per channel should plan on sourcing a higher-capacity power supply beyond what typically ships in the box, since the stock supply leaves a large gap between advertised and delivered power. Those who want an all-in-one amp with a built-in phono stage or Bluetooth should look at other AIYIMA models built specifically for those features.

Frequently asked questions