Alan March wrote: . . BTW the Cosmos ADCs when optimized do beat this. Yes, especially when used in mono mode.

Alan March wrote: Yep...well.... sort of....probably not 🙂 . Don't forget that you are also at/beyond the limits of the AP555. 100 watts into 4 ohm...

Oh wow...ok, didn't take that into account the possible limitations within the AP system. BTW, I know that AP system specs are not consistent. The pos...

Alan March wrote: As I said, it's doing similar process to measuring the 5 watt looking at the noise floor separately. You have to do a few more thing...

Thanks for the "keeps coming back" awards as well😂...some would view me as a pest that needs to be swatted! I just seem to find your site fascinating,...

Thanks for letting us know not to read too much into the distortion numbers shown in the power sweeps. They simply indicate the maximum power availabl...

Alan March wrote: Yes the buffer and additional gain will increase the noise and distortion over the measurements of the module in a stand alone confi...

Alan March wrote: Primarily its due to FFT gain. The line you see in the plot is not the total overall noise floor as measured 20Hz to 20kHz. A FFT ...

Alan March wrote: @SmartOne_2000 Those power sweeps you were interested in. A random unit pulled from the production line. 8 ohms 1kHz 234 8 ohms 40...

Thanks, so how would you explain the -150dB noise floor of the P801 1kHz plot you posted earlier? Was that low level achieved with averaging?

Alan March wrote: This is the 1et400 using the Purifi Eval buffer. Unfortunately Amir uses such a low resolution FFT we can't see very far into the ...

Maybe the rationale behind the continuous test was to expose the amplifier to the stringiest of conditions, i.e. deliver rated power and distortion ac...

Alan March wrote: I can understand the question, its very reasonable. Published specs could be "golden samples" and unrepresentative. We test every ...

On another point, and this might be propriety information, I wonder how the published amplifier specs are representative of the amps you build on a da...

Alan March wrote: This is the 1et400 using the Purifi Eval buffer. 229 Unfortunately Amir uses such a low resolution FFT we can't see very far into t...