A07 TPA3255 Power Amplifier 300Wx2 HiFi Class D Stereo Digital Audio Amp 2.0 Channel Amplifier for Passive Speaker Home Audio (A07+DC 32V Power Adapter)

AIYIMA A07 TPA3255 Power Amplifier Features
1) Strong Practicality: The solid appearance design is simple but powerful, easy to operate, and better suitable for your preamp or DAC
2) The Purpose Of Our Factory Is To Create A Real Hifi Sound Product: Take the real scene shooting, show the real visible appearance texture to customers, Reduce the deviation of real texture due to 3D modeling
3) Good Sound Quality: Use TPA3255 high performance and low distortion class-D power amplifier chip
4) Can Upgrade Op Amp Chip: Adopts dual op amp chip, and the design of the op amp chip can be replaced, such as updated to OPA series, LM series, MUSES series, which can meet the needs of more audio enthusiasts
5) Use Different Power Adapter, Can Drive Almost Home Passive Bookshelf Speakers: Can Drive up to 300 W+300 W into 4- load at 10% THD use DC 48V current over 7.5 A; Original packaging with DC 32V 5A power supply, See the figure below how big the speaker are used
6) One Audio Signal Can Be Shared In Multiple Rooms(Only In Case Of 3.5 mm
AUX Output): 3.5 mm AUX audio output can go to any active device(Active speaker, active amp, active subwoofer ect. ), But the main volume control only works with speaker terminals not work with 3.5 mm aux audio output terminals
7) Offer Good Service: Offer technical help and sales service
Amplifier chip TPA3255 (The op amp chip can be replaced)
Max Output power 300W+300W (4 ohm load, Under DC 48V, Current Over 7.5A )
Audio input ways 3.5 mm AUX Audio input/ RCA Audio input
Number of channels 2.0 channels/Stereo
Power supply DC24-48V (outer diameter 5.5 mm inner diameter 2.5 mm)
Audio Output ways 3.5 mm AUX Audio Output (Connect active equipment) / RCA (Passive Speaker)
Impedance 2-8 Ohm
Size 154*100*40MM/6* 3.93 * 1.5 inch


HiFi integrated class D amplifier
300W+300W Dual Channel audio amplifier, Mini Power Amp, More powerful, Sound great

Build quality is surprisingly solid, Nice touch

The dual 300W shocking bass output is compatible with passive stereo speakers of most sizes and impedance specifications

Two input ways: 3.5 mm AUX Audio input(Can match our T9 tube Amplifier, The T9 Amplifier as the DAC use for A07)/ RCA Audio input

Note: When using a 32V or 36V power supply, the sound quality of the A07 amplifier will be better, the distortion rate will be low, and the service life will be longer, but the power can only reach the size of the voltage multiplied by the current. For example, using a 32V 5A power supply, the power can only reach Max 160W.

Therefore, please choose the speaker and power supply reasonably according to the requirements, so that the machine can achieve the best use effect.


Use TPA3255 Chip, digital audio amplifier BTL bridge max power output 300W x 2 channel design, THD less than 0.008 % when working continuously
Please pay attention!

Q: Why the amplifier distortion when raising volume?

A: Under normal circumstances, distortion is caused by the mismatch between the power of the amplifier and the speaker.

Q: How to match the amplifier and speakers reasonably?

A: The best match is 1.2 - 1.5: 1 (that is, the speaker power is 50W, then the power amplifier power is 60W-75W)

Q: The power amplifier is connected correctly, why is there noise such as electric current?

A: 1. please check whether there is current sound when no load, and whether there is no current sound when no load; 2. please replace the audio input wire and input device. Inferior audio lines can also cause noise; 3. If there is current noise at no load, you can replace the power supply to test again; 4. Power Supply & speaker power do not match with the Amplifier, will also lead to noise problems such as distortion; 5. At the same time, confirm that the surrounding current signals will not cause interference to the equipment; 6. Please make sure all the cable completely pushed into the device, incompletely connections will create distorted. At the same time, it is ensured that there is a spacing between the output positive and negative audio lines, being close together will cause noise or one of the channels will not work;

Q: Can this A07 work with headphones?

A: This A07 does not work with headphones, 3.5 mm AUX interface is mainly used for audio output, it can also be used as audio input. But 3.5 mm AUX and RCA input port cannot be used as input at the same time. Please keep in mind!

Note: The use of audio electronic products is closely related to the size of the speaker and the power supply. It should be used in a reasonable combination.

Why only one channel work? Is it defective?
Since the electronic product is not used alone, it needs to be used together with other electronic equipment such as power supply, audio source, speakers, etc., so the problem cannot be generalized to be considered as the problem of this product, and it needs to be ruled out one by one!

1. Please confirm the connect is correct before use!

2. Are the positive and negative wires connected to the speaker connected together?

A: Please separate the positive and negative wiring with an insulator, then shut down and restart to use.

3. Used with mismatched speakers, the power supply used does not have enough power to drive the speakers, or the speaker power is too large

A: Please check our detail description as below, Our A07 with a free DC 32V power adapter, Use this power adapter, the A07 output is about 65-80W for per channel.