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Eversolo AMP F2 Amplifier Review

Rate this amplifier:

  • 1. Poor (headless panther)

    Votes: 75 28.4%
  • 2. Not terrible (postman panther)

    Votes: 166 62.9%
  • 3. Fine (happy panther)

    Votes: 21 8.0%
  • 4. Great (golfing panther)

    Votes: 2 0.8%

  • Total voters
    264
People hi :)

I think I should offer to help them make a much better next model if they need it (apparently: YES)... :rolleyes:
 
moreover this F2 amp is reminiscent of the Starke Sound AD4.320 which uses the same PSU and almost same design
ASR measurments :
That was one of the biggest "marketing vs reality" scandals this site has seen.
 
Doesn't really cut it. Load dependent frequency response is a solved problem even for the $200 class D amps, and it's been that way for over a year. So why a product priced at $750 for a stereo amp still has that issue is unfathomable and unforgiveable.

Great review, Amir.
 
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Considering that many similar amps apparently work better with lower impedance loads, another question is do we still need 8 ohm passive speakers as standard nominal impedance?

Active speakers generally use now 4 ohm with lower voltage rails.
 
There is no problem at 4 ohm, flat frequency response, only 8 ohm causes trouble.

But both resistive little realistic loads..
My question was re: "another question is do we still need 8 ohm passive speakers as standard nominal impedance?

I can agree in this particular case, but this is not 8ohm problem , this is Starke/Eversolo problem here
 
My question was re: "another question is do we still need 8 ohm passive speakers as standard nominal impedance?

I can agree in this particular case, but this is not 8ohm problem , this is Starke/Eversolo problem here
It is a very common issue with class D amplifiers, though some offer now blameless performance.
 
Maybe Eversolo should stick with streamers . This amp is a product I would never buy based on its performance
 
Let’s not kid ourselves. This is a Starke amplifier with an Eversolo name slapped on it.
I gave it a “not terrible” rating. The measurements are nowhere near SOTA, but they aren’t THAT bad. They aren’t particularly good, and are not a good value for the money, but are “not terrible.” They are most probably below the limit of audibility, but if your speakers are highly inefficient, then at certain points when the amp starts to run out of gas, it might have audible consequences (ie, clipping due to not having enough headroom). But that holds true for any 100wpc amp.
 
It is easy to mistake a Starke amplifier for an Eversolo amplifier from the front panel and the overall design of the case:

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All Starke amplifiers have the same company faceplate design. The Eversolo has the same design, except for the badge and text. It uses the same N600 module, the same speaker connections, possibly the same power supply. Is it really a Starke flying under Eversolo colours?
 
Such a wasted nice case work and decent I/O hardware components.
These brands can sell their stuff for prices like this, perhaps for their dedicated customer base creating some kind of brand ecosystem…. I know some with such mindset.

Thanks @amirm
 
Surprisingly poor performance from Eversolo, guess quality streamer doesn't mean they can make a good amp.
 
This is IMHO, well, not smart... Such "lemons" (and not cheap either) can spoil the hard earned brand reputation very fast.
 
It is a very common issue with class D amplifiers, though some offer now blameless performance.
Yes, if you call a whole lot from 300 moneys upwards "some", and 20 years ago (Hypex UcD release) "now" or "recently".

In this price range, it's some horribly outdated performance. Unacceptable.
 
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My question was re: "another question is do we still need 8 ohm passive speakers as standard nominal impedance?

I can agree in this particular case, but this is not 8ohm problem , this is Starke/Eversolo problem here
The electrical impedance of a speaker or speaker system can be represented as magnitude and phase or as a real and imaginary part. The real and imaginary representation is the most useful. The real part of the impedance is what you call "true impedance" and represents the load into which the amplifier delivers real power. The imaginary part determines the reactive power exchanged between the load and the amplifier and not transferred to the load. The Dayton measurement system should be able to represent the impedance as a real and imaginary part (DATS V2 and V3 do). This saves you from calculating the real part (multiplying the magnitude by the cosine of the phase angle). Now, suppose a system has a minimum of 2 Ohms at 100 Hz and the amplifier does not have enough current. The amplifier clips, but not only at 100 Hz: it becomes "blind" to anything presented to its input (until linear operation is re-established). This is one of the reasons why multi-amplified systems are superior to passive systems. If one amplifier clips, the others continue to function, and distortion, even if present, is much less noticeable.
 
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