AIYIMA A07 PRO Review TPA3255 Power Amplifier With Bluetooth

Tuesday, April 18, 2023

The new A07 PRO by AIYIMA is an ultra low distortion and high definition amplifier with a high power chip by Texas Instruments. Can be used as a 2.0 channel amplifier and 2.1 channel amplifier with subwoofer.

The AIYIMA A07 PRO amplifier has a metal enclosure made of scratch resistant aluminium with a detachable front panel and rear panel. The connectivity ports are located on the rear and include red/white RCA inputs, 3.5mm line out and banana plugs for external stereo speakers. The AIYIMA A07 PRO amplifier supports 2 ohm stereo speakers, 4 ohm stereo speakers and 8 ohm stereo speakers. 
There is no 3.5mm headphone port on the AIYIMA A07 PRO amplifier; other than a line out 3.5mm port, which cannot be used for headphones because it has no amplification built-in to it. It is not capable of driving low impedance loads (e.g. headphones) other than very high impedance loads like a power amplifier or active subwoofer. That said, you can can still connect headphones to the AIYIMA A07 PRO amplifier but, you will need to do it via a headphone amplifier headphone out.
Dimensions of the AIYIMA A07 PRO amplifier are 19cm deep x 11.5cm wide x 4cm high and 637 grams in weight. The knobs on front measure 1.2cm deep and are made of metal. The knobs include a volume knob and two tone controls to adjust the decibel level of the bass volume (12dB/-12dB) and treble volume (-9dB/+9dB). There are also two metal toggle switches for power on/off and connectivity mode (wired or wireless). 

The AIYIMA A07 PRO knobs have no centre button so, they aren't clickable. The knobs have a silent smooth rotation and sit on top of standard potentiometer with stops. The knobs feel well built and have a textured line finish. They do not rattle and have good resistance too for gradual adjustment.The knobs don't have midway notch for 50% value but they have white markings.

It's nice that an external power supply is included with the AIYIMA A07 PRO. This gives you flexibility when it comes to replacing the power supply, allowing you to use a power supply between 24 volts and 48 volts. While it's nice a power supply is included, it has three drawbacks. 1)It is a no-name brand, 2) It is a 36V power supply, and 3) It is a switching power supply similar to a laptop power brick, which is okay but a linear power supply is typically better for eliminating power supply noise. On the bottom of the A07 PRO amplifier, you find standard rubber isolating feet (4mm thick)

Potential deal breakers
  • Switching power supply
  • No 3.5mm headphone jack
  • Can get hot
  • Does not include 48V/10A power supply
Selling points
  • Can drive 4 ohm speakers (300 Watts Max per speaker)
  • TAP3255 class D amplifier chip
  • Wired connectivity (via RCA)
  • Bass/treble tone controls 
  • Sub out port for an active subwoofer/power amplifier
  • Volume knob control
  • Wireless connectivity (Bluetooth)
  • Anodized aluminium enclosure
  • SBC, AAC, aptX & aptX-HD 
  • Metal knobs
  • Qualcomm Bluetooth 5.2 chip (QC304X)
  • Low noise 
  • High signal-to-noise ratio (SNR) 92dB
  • Supports up to 48V input power
  • Replaceable Op-Amps (NE5532)
  • Detachable bluetooth antenna
  • Can drive 8 ohm speakers (150 Watts Max per speaker)
Accessories included are a 10cm long removable bluetooth antenna, 1.5 meters figure8 power cord and 48V switching power supply with a 1 meter long standard DC barrel connector. You could use any laptop power supply. Dimensiuons of the power supply are 18cm long x 7cm wide x 4cm thick. the weight is 470 grams. You can buy the AIYIMA A07 PRO amplifier from amazon.

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