This is a review and detailed measurements of the Eversolo AMP F2 balanced amplifier. It is on kind loan from a member and is on sale for US $750.
While simple, the amp looks attractive enough for its price category. Despite being class D, it has fair amount of heft to it.
If you look above the power switch, you see a reference to Starke. It seems that they have designed and built this amp as it is very similar to their Fiera4. Connectors look and feel high quality. There is no gain switch.
I have slightly abbreviated my testing.
Eversolo AMP F2 Measurements
We start with our usual dashboard using XLR input:
Despite pronounced spray of harmonics, overall noise+distortion figure is above average:
Using RCA input brings more power supply noise and such (which I tried to minimize):
We see that cost in SNR measurements:
I was disappointed to see output load dependency at this price level:
Crosstalk is OK:
Multitone shows rising distortion with frequency (typical):
Power measurements shows early onset of distortion (taking over noise):
Nice to see it meeting its power specification:
There is some power drop at 40 Hz:
The amp was difficult to measure in these tests as it would shut down its output without the front indicator changing color. So I did not try to run my "FTC like" test. Good approximation is my power vs frequency sweeps:
The rise in distortion with frequency is quite substantial above lower treble. SINAD drops to lower than 60 dB at 15 kHz.
There is likely power on/off noise even when using standby switch:
The F2 is stable on power up:
Conclusions
The F2 turns in decent numbers across the board except in one key area: frequency response. In this day and age, we can get load independent class D implementation at a third of its price. I feel like some companies are unaware of the development in this area, and continue to produce amplifiers with this issue. The upshot is that the amp can sound slightly brighter or duller depending on what speaker you use with it.
Distortion also rises quite rapidly at higher frequencies -- again something that is not competitive anymore for this price class.
For above reasons, I can't recommend the Eversolo AMP F2 amplifier. It is not remotely in the same class leading DACs and streamers the company produces.
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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/
While simple, the amp looks attractive enough for its price category. Despite being class D, it has fair amount of heft to it.
If you look above the power switch, you see a reference to Starke. It seems that they have designed and built this amp as it is very similar to their Fiera4. Connectors look and feel high quality. There is no gain switch.
I have slightly abbreviated my testing.
Eversolo AMP F2 Measurements
We start with our usual dashboard using XLR input:
Despite pronounced spray of harmonics, overall noise+distortion figure is above average:
Using RCA input brings more power supply noise and such (which I tried to minimize):
We see that cost in SNR measurements:
I was disappointed to see output load dependency at this price level:
Crosstalk is OK:
Multitone shows rising distortion with frequency (typical):
Power measurements shows early onset of distortion (taking over noise):
Nice to see it meeting its power specification:
There is some power drop at 40 Hz:
The amp was difficult to measure in these tests as it would shut down its output without the front indicator changing color. So I did not try to run my "FTC like" test. Good approximation is my power vs frequency sweeps:
The rise in distortion with frequency is quite substantial above lower treble. SINAD drops to lower than 60 dB at 15 kHz.
There is likely power on/off noise even when using standby switch:
The F2 is stable on power up:
Conclusions
The F2 turns in decent numbers across the board except in one key area: frequency response. In this day and age, we can get load independent class D implementation at a third of its price. I feel like some companies are unaware of the development in this area, and continue to produce amplifiers with this issue. The upshot is that the amp can sound slightly brighter or duller depending on what speaker you use with it.
Distortion also rises quite rapidly at higher frequencies -- again something that is not competitive anymore for this price class.
For above reasons, I can't recommend the Eversolo AMP F2 amplifier. It is not remotely in the same class leading DACs and streamers the company produces.
------------
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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