This is a review and detailed measurements of the AIYIMA A07 Pro stereo amplifier. It was kindly drop shipped to me by a member and costs about $90.
As you see the distinguishing factor from some of the other Aiyima amplifiers is inclusion of tone controls. Alas, that is also where the problem is with this unit: there is no detent and no way of setting its response to flat. Worse yet small changes in the dials will make large differences in tonality. So while I like having toner controls, I definitely like to see a tone defeat feature. Otherwise the unit feels nice to use and operate. As is typical, the power supply is much larger than the amplifier itself:
AIYIMA A07 Pro Measurements
As usual we start with our dashboard of 1 kHz tone into a pure 4 ohm load, driven to stereo at 5 watts:
We expect good performance from AIYIMA and we get it:
Switching to my PowerCube Loadbox, we can simulate more complex loads: (1 channel tested)
As you see, performance is essentially the same.
Noise performance is good enough for this class of budget amplifiers:
Multitone shows good performance:
Frequency response unfortunately is load (speaker) dependent:
So you may be forced to use the treble control to adjust high frequency response for your speaker.
Crosstalk is very good:
Let's get into all important power measurements starting with 4 ohm:
This is plenty for desktop use. Switching to 8 ohm naturally robs us of fair amount of power:
Fortunately vast majority of speakers on the market are 4 ohm nominal.
To see stability of the amplifier, let's subject it to suite of loads and reactive components:
An ideal amplifier would follow the red line. We are essentially there for both 8 and 4 ohm. Surprisingly this little amp managed to also keep running at 2 ohm, albeit without capacitive component and some power drop. Many amps simply shut down and won't even work into 2 ohm.
Edit: here is the response vs frequency that I forgot to post originally:
Finally, here is the warm up profile:
In use, the amplifier ran pretty cool.
Conclusions
The AIYIMA A07 Pro continues the tradition of the company providing competent levels of noise and distortion, good bit of power and very reasonable price. While tone controls are a nice added feature, they lack a defeat switch. And we have our usual load dependency.
Personally I very much dislike the lack of tone control defeat so won't buy it. But if that doesn't bother you, then the AIYIMA A07 Pro is another good bargain in stereo amplification.
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As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
As you see the distinguishing factor from some of the other Aiyima amplifiers is inclusion of tone controls. Alas, that is also where the problem is with this unit: there is no detent and no way of setting its response to flat. Worse yet small changes in the dials will make large differences in tonality. So while I like having toner controls, I definitely like to see a tone defeat feature. Otherwise the unit feels nice to use and operate. As is typical, the power supply is much larger than the amplifier itself:
AIYIMA A07 Pro Measurements
As usual we start with our dashboard of 1 kHz tone into a pure 4 ohm load, driven to stereo at 5 watts:
We expect good performance from AIYIMA and we get it:
Switching to my PowerCube Loadbox, we can simulate more complex loads: (1 channel tested)
As you see, performance is essentially the same.
Noise performance is good enough for this class of budget amplifiers:
Multitone shows good performance:
Frequency response unfortunately is load (speaker) dependent:
So you may be forced to use the treble control to adjust high frequency response for your speaker.
Crosstalk is very good:
Let's get into all important power measurements starting with 4 ohm:
This is plenty for desktop use. Switching to 8 ohm naturally robs us of fair amount of power:
Fortunately vast majority of speakers on the market are 4 ohm nominal.
To see stability of the amplifier, let's subject it to suite of loads and reactive components:
An ideal amplifier would follow the red line. We are essentially there for both 8 and 4 ohm. Surprisingly this little amp managed to also keep running at 2 ohm, albeit without capacitive component and some power drop. Many amps simply shut down and won't even work into 2 ohm.
Edit: here is the response vs frequency that I forgot to post originally:
Finally, here is the warm up profile:
In use, the amplifier ran pretty cool.
Conclusions
The AIYIMA A07 Pro continues the tradition of the company providing competent levels of noise and distortion, good bit of power and very reasonable price. While tone controls are a nice added feature, they lack a defeat switch. And we have our usual load dependency.
Personally I very much dislike the lack of tone control defeat so won't buy it. But if that doesn't bother you, then the AIYIMA A07 Pro is another good bargain in stereo amplification.
-----------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
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