• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). There are daily reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Aiyima A08 TPA3255 Amplifier - Owner review and initial impressions

Xulonn

Major Contributor
Forum Donor
Joined
Jun 27, 2018
Messages
1,695
Likes
5,431
Location
Boquete, Chiriqui, Panama
Note: There is a long 64 page ASR thread titled "Which TPA3255 amp do you recommend?" [LINK] that was started I September, 2019. Although I have not tried other TPA3255 amplifiers, this is the one that I now own and recommend highly based on its excellent performance and features that are perfect for my requirements.
=================================================================================​

AIYIMA with SMPS.jpg

My previous desktop amp was an I.AM.D. v200, based on the TI TAS5614LA chip, which is rated for [email protected]Ω/[email protected]Ω. It is one of the tiny modern amplifiers with a coarse LED display (which was losing pixels), and an external brick power supply. It also had a tiny remote control which is not useful when you are sitting at a desk with your hand inches away from the amp. So that makes the lack of a remote for the Aiyima A08 is not an issue for me, although the lack of a remote would make it less convenient for living room systems where you sit out of reach of your amplifier. The I.AM.D v200 was so small with such a tiny volume knob that I could barely grip it, and my fingers hit the desktop when turning it.

Sound-wise, the I.AM.D v200 was o.k., so I made the "upgrade" to the Aiyima A08 based mostly on the feature set. However the I.AM.D. v200 never reached the "so loud it hurt my ears" like the Aiyima A08 can do - in spite of similar power output ratings (which have not been verified by independent testing).

I purchased my Aiyima A08 from Amazon for $170, although it costs less at some AliExpress stores in China. The A08 weighs 3.31 pounds (1.49 kg), so with the internal power supply, it is quite a bit heavier than the typical mini-amps that use the TPA3255 or similar amplifier chips and external power bricks. Rather then looking and feeling like a miniaturized traditional SS amplifier, it is more like a standard size traditional SS amp with the left and right sides cut off. Since it is my desktop/computer amplifier, I wanted to put it under my HP 24" monitor, but the Aiyima was a little too tall. So I made a 1/2" riser to lift the monitor up a bit. I am right-handed, and the larger volume knob is conveniently located right above the top right corner of my keyboard, and only a couple of inches from my trackball (which I prefer for general use rather than a mouse).

Because I am aware that properly engineered and manufactured low distortion amplifiers should sound the same when used within their limits, I did not expect the Aiyima to be able to drive my Q Acoustics 3010 loudspeakers to such deafening levels without audible distortion. From an ASR post by @Tangband "On the Swedish forum faktiskt.io they have checked the voltage of that amplifiers power supply and its 36 V 9.6 A . That gives about 2*150 watt at 4 ohms, 1 % distortion)". Based on the below graph fro the TI spec sheets, the Aiyima A08 should produce a little less output power than the Swedish forum post stated, and about the same output as my little I.AM.D v200, which is [email protected]Ω/[email protected]Ω. I will never know for sure, because I expect @amirm to get an Aiyima A08 to evaluate, but the old I.AM,D v200 will very likely never be tested at ASR.

I have seen posts about the current rating of brick power supplies limiting the output of chip amps, and I might start another thread to ask the experts and learn more about the relationship between power supply voltage, current, and how they interact with amplifier output. Without searching for info, it seems to me that the 36v/9.6a rating of the Aiyima A08 internal power supply is high enough to product a robust output. It is also the max that I have seen recommended to avoid stressing and or overheating an amplifier when it is used to listen at high volume with low efficiency loudspeakers.
TPA3255 Input Volts vs Watts Output.jpg

Bottom line:
- I like my Aiyima A08 amplifier and highly recommend it as a desktop amplifier.
- It has no tweeter hiss that I can hear with volume at max
- The Aiyima A08 can drive my Q Acoustics loudspeakers to deafening levels with no audible distortion
- Bluetooth input is not useful to me, but may be for others
- USB + RCA are the "hardware" inputs, but I don't use Coaxial or optical on my desktop
- Since I only use the USB input, having the USB/RCA source switch on the back or the amplifier is not an issue for me.
- The Aiyima A08 would have a broader potential user market if it had a line-level subwoofer output.
--------------------------------------------
Below are the Aiyima specs.

Basic Parameters:
Amplifier IC: TPA3255
Output power: 315W/4Ω 185W/8Ω
Bluetooth version: Qualcomm QCC3034 5.0 chip
Decoder IC:pCM5102 decoding
Bluetooth support: CRS8675-SBC/AAC/APTX/APTX-LL/APTX-HD 16-24Bit 44.1Hz-48Khz
USB decoding: 16Bit-48Khz
Frequency response: 20Hz-20Khz
Input power: AC100-240 50/Hz
Operational amplifier: NE5532
Signal to noise ratio: (SNR)> 111dB
Impedance: 4-8Ω
Quiescent current: 60mA
Work efficiency:.>90%
Output Power:
315W/4Ω, distortion 10%
185W/8Ω, distortion 10%
260W/4Ω, distortion 1%
150W/8Ω, distortion 1%
Product size: 101*93*184mm
 
Last edited:

phoenixdogfan

Major Contributor
Joined
Nov 6, 2018
Messages
2,242
Likes
2,589
Location
Nashville
So happy to see you back in action. :D

I recently bought the Aiyima A07 to drive a Kef HTC 3005 SE, I recently purchase for my small bedroom sized home theater. And yes. Aiyima, as far as I can tell, does indeed deliver the goods. I was just looking for a way to add a center channel to what was my Kef LS 50 Meta based 4.1 home theater, and a late model 2009 vintage Kef home theater center and the Aiyima provided me with a way to do something that seems to fit right in with my pricier gear for around $200 for speaker, stand and amp together.
 

thewas

Major Contributor
Forum Donor
Joined
Jan 15, 2020
Messages
4,309
Likes
9,546
I also bought one and use one since a year as a temporary replacement for my broken large Yamaha AX-1050 amp and its working fine driving my loudspeakers to very high SPLs.
 

Tangband

Major Contributor
Joined
Sep 3, 2019
Messages
1,118
Likes
1,039
I can recommend the LM4562 instead of 5532 , the sound ( and measurements ) gets a bit better . Audiophonics is a good dealer .
 
Top Bottom