Amazon Basics 80 Watt Class D Amp Review

[VintageFlanker]

It's everywhere....In manuals, on product's box, on the product (sometimes).

Of course, that is common. But as far as I can tell, I've only red multiples languages (mostly French) only at the back of units.

 

[daftcombo]

Seems like they missed all the basics on this amp.

 

[pma]

You don't need to wonder. Go check out the specs of the 2100.

(I would not be over optimistic re McIntosh tube poweramp measurements.) Correction - 2100 is solid state

https://www.stereophile.com/content/mcintosh-mc275-power-amplifier-measurements

It is just physics, John.

 

[Deleted member 27694]

Just out of curiosity since I have no technical knowledge. Is this something people should and would hear in a blind test? So if you level volume and compare it with something that measures much better there is an audible difference?
Is it so that the average person would notice it or do you only notice it with well trained ears?
Thank you!

 

[pma]

Just out of curiosity since I have no technical knowledge. Is this something people should and would hear in a blind test? So if you level volume and compare it with something that measures much better there is an audible difference?
Is it so that the average person would notice it or do you only notice it with well trained ears?
Thank you!

In many cases not. The biggest problem is the frequency response modulation by speaker impedance, so it will depend on complex impedance of the speaker used so the DBT difference is possible depending on speaker. Except for that, the amp will be fine for a common user.

 

[Deleted member 27694]

In many cases not. The biggest problem is the frequency response modulation by speaker impedance, so it will depend on complex impedance of the speaker used. Except for that, the amp will be fine for a common user.

Thank you!

 

[JSmith]

So if you level volume and compare it with something that measures much better there is an audible difference?

So there are products with almost double the SINAD figures of this amp... so yes there will be a measurable and audible difference here IMO, YMMV.

Would you really buy it and sit there happy knowing how poor this is? I couldn't...



JSmith

 

[abdo123]

Such a pitty considering the amp is loaded with quality of life features.

Auto turn on by detecting input signals AND trigger IN/OUT.

It would be insane value if it was 75-80 SINAD.

 

[pma]

It would be insane value if it was 75-80 SINAD.

SINAD measure is close to useless and in such level has no correlation to listening, if it is not hum and hum/buzz is hopefully not the case here. If I had it in place, I would make an A/B test of this power amp. Amir might try some listening.

 

[The Capstan]

Well, with approx 40$ more you can get the Loxjie A30 with also digital inputs, that’s a completely different story performance wise.
Interesting the fact that the Amazon can be bridged and used in dual mono. Quite unusual for this category, I think...

 

[abdo123]

SINAD measure is close to useless and in such value has no correlation to listening, if it is not hum and hum/buzz is hopefully not the case here. If I had it in place, I would make an A/B test of this power amp. Amir might try some listening.

I would typically agree, but below 70 SINAD i think audibility can very quickly becomes a concern.

Crosstalk as well is problematic.

 

[Deleted member 27694]

So there are products with almost double the SINAD figures of this amp... so yes there will be a measurable and audible difference here IMO, YMMV.

Would you really buy it and sit there happy knowing how poor this is? I couldn't...



JSmith

Thank you. If it is for my untrained ears with my Klipsch rf82 not audible i honestly would not care about things that can be measured.

 

[abdo123]

Thank you. If it is for my untrained ears with my Klipsch rf82 not audible i honestly would not care about things that can be measured.

You don’t need trained ears to hear noise though, Class A/B usually has lower noise floor but really bad (in comparison) distortion that brings their SINAD score closer to the 77 mean on this forum.

Hearing distortion is quite difficult (since your speakers distort too and probably more than the amp itself), but every one experienced twitter hiss at least once in their lives.

So depending on how sensitive your speakers are you might actually hear twitter hiss from this amp.

 

[Deleted member 27694]

You don’t need trained ears to hear noise though, Class A/B usually has lower noise floor but really bad (in comparison) distortion that brings their SINAD score closer to the 77 mean on this forum.

Hearing distortion is quite difficult (since your speakers distort too and probably more than the amp itself), but every one experienced twitter hiss at least once in their lives.

So depending on how sensitive your speakers are you might actually hear twitter hiss from this amp.

Thank you! Very helpful: So depending on the speakers people in a blind test should hear a difference.

 

[respice finem]

Perhaps such egregious technical achievements should be honoured by a special panther
https://cdn20.pamono.com/p/g/6/0/60...an-from-united-artist-corp-2000s-imagen-6.jpg
/scnr

 

[DSJR]

Crosstalk may be academically bad, but when does that stop vinyl lovers raving about width of soundtsage in a cartridge with 30 - 35dB separation maximum in the midrange. Distortion levels are about the same as some popular UK amps from the 70's (so glad some of them didn't find their way to the US in any real quantity ) with only the response/level changes into different speaker loads being a real caution (would be good if Amir could resurrect the artificial speaker load as per Stereophile).

 

[Matias]

This is what gives class D amps a bad rep...

 

[PeteL]

Just out of curiosity since I have no technical knowledge. Is this something people should and would hear in a blind test? So if you level volume and compare it with something that measures much better there is an audible difference?
Is it so that the average person would notice it or do you only notice it with well trained ears?
Thank you!

If you hook it up to these you may fail a blind test on which amp sound better

 

[abdo123]

This is what gives class D amps a bad rep...

As if people look at measurements to support their anecdotal subjective opinions.

Class D reputation is based on audiopholery.

 

[Deleted member 27694]

If you hook it up to these you may fail a blind test on which amp sound better
View attachment 116142

Not helpful and soso funny...