SMSL A100 class D amplifier test

[somebodyelse]

You do that often?

It's a commonly described way to do a quick and dirty check for bad RF emissions, especially if you know what frequency range is likely to be a problem.

 

[DoctorRobert]

I got one of these and I am quite happy with it. It was the cheapest tidy solution with an internal power supply and a sub out. I had to use an USB opto isolator to resolve a hum issue coming from my PC. It is used to power a pair of KEF Q100s I already had, and a subwoofer. Equalised with REW the result is quite enjoyable in my small office room. In the appartment building I live in there is so much RF-mess that I doubt that this little amp will affect anything.
As always, YMMV

 

[Bjorn]

Infineon is what Genelec uses if I remember correctly. But different chips.

 

[Sokel]

Infineon is what Genelec uses if I remember correctly. But different chips.

Someone will eat me alive for this,but I think is the car audio variation (which is not a bad thing considering the conditions in a car)

 

[Roland68]

It would be interesting to test an amplifier with a slightly "stronger" Merus MA5332 chip.

This is simple:
SMSL A300 Stereo Amplifier Review
I find the high performance as a mono amplifier in BTL mode particularly interesting.

 

[dr_mick51]

SMSL A100 is sold as a completed product, thus the customer is not supposed to insert inductors or anything into speaker wires. It must work “as is”. The complex load impedance of the speaker is also not pre-defined, parameters are specified to 4 and 8 ohm. I do not understand why some try to protect manufacturers, customers are to be protected.

And I don't disagree with you. I'm with you on this.
Maybe the problem is I don't think as a regular consumer, I'm a hardcore modder.
You are right, regula consumers should be informed and probably don't buy this amplifier under certain conditions.
The Loxjie A30 is a good MA12070 based amplifier and a better alternative.

 

[somebodyelse]

The Loxjie A30 is a good MA12070 based amplifier and a better alternative.

Which also lacks an LC output filter, if I remember the internal pics correctly. There was also a complaint about interference with powerline ethernet in that thread.

 

[SlowJim]

fwiw, i have a RSL ia255 which is also MA12070 and zero interference issues. It sits on my desk between two 4k monitors and a foot away from my mac mini. Also have a macbook pro I use for work and have never experienced any wifi or bluetooth issues.

 

[tmtomh]

The amp's rising distortion above 10kHz is not "unacceptable" unless it produces distortion in the audible band, as determined by something like an IMD test, which results were "better than expected" because "all the junk is above 20kHz."

It's amazing how some folks will avoid putting these two facts together into a single comment, lest other members realize that the amp's HF distortion is not necessarily a problem and not "clearly audible."

 

[Solveit]

MA12070 sounds best with balanced input as Topping Pa3s have, also an filterless amp.
But long speaker cable would pick up noise.