Mark185

@Mark185 I thank you for your effort in analyzing the specifications and performance of the device and asking for clarifications, we are...

@AIYIMA I owe you an apology about claiming the high pass filter is 6 dB/octave. I am an electrical engineer and I should have known...

@AIYIMA I owe you an apology about claiming the high pass filter is 6 dB/octave. I am an electrical engineer and I should have known...

The high pass appears to have a non-linear response that starts out at 6 dB/octave for the first octave below the crossover set point...

The Wiim Amp Pro with built in DSP is far superior to the Aiyima A20. it costs a significant amount more but it is worth it. I have...

So, Aiyima A20 or Douk A5 with regard to combined quality of the amp itself + the HPF? I just pulled the trigger and bought my sub (the...

It would not surprise me to find out my example is faulty and I think it will be a good result if the sub out design turns out to be...

I have taken a balanced approach with my comments acknowledging what is good about the A20 and presenting test data I generated. No we...

There are no protections like that I am aware of here. I know from past experience that if I call Amazon customer support and explain...

I am speculating here but the appearance is that this was released to meet a deadline for their anniversary without completing the...

Unfortunately, I see it the same way; to initially appear customer-oriented and then to run for cover at the first sign of difficulty is...

I agree with you on the poor filter implementation. I have not even posted about the subwoofer out but it is not good unless my A20 is...

I suspect this is a problem for Aiyima. The A20 is a flagship product for them. Any criticism is bound to cause problems for someone...

I posted new set of measurements on the other thread...

I originally posted to Amir's thread where he measured the Aiyima A20 where I reported measuring the HP filter as having a 6 dB/octave...