andy2

Responses from andy2

Some thoughts on ASR and the reviews
Pass Lab second harmonic generator. Makes the sound more like tube.  Some people like that. https://www.audioasylum.com/forums/amp/messages/24/244324.html  
Some thoughts on ASR and the reviews
Hi Amir, Does the 1KHz tone that you measure on the DAC, does it tell you how good the bass is or how sweet the treble sounds?  Do you have a test for these as well?  
Some thoughts on ASR and the reviews
Amir offers simple explanations to complex problems. That is exactly what we are talking here.   
Some thoughts on ASR and the reviews
What on earth are talking about? Spectrum analyzer shows the spectrum, not time domain amplitude. We are measuring output impedance. The spectrum analyzer measures the voltage amplitude for each frequency. Why do you need to introduce "time dom... 
Some thoughts on ASR and the reviews
Your thinking is wrong. All testing is done in time domain. The graphs are shown in frequency domain since it is hard for a human to tease out the noise and distortion from a waveform display in time domain. Keep in mind again that based on Fouri... 
Some thoughts on ASR and the reviews
  I think you measured using a single frequency at steady state response at one 1KHz. It might not reveal the affectiveness or deficiencess of the power plant.  It is not even close to being adequate.  A better test would be using a square w... 
why expensive streamers
Same goes for cars; yeah, you can buy a car based on specifications alone, but specifications don't tell you what the leather smells like, how the door shuts so quietly, and how the engine sounds when you turn it on and how fun it feels when you ... 
why expensive streamers
^^^ I see that your DAC can take either spdif or usb. In general asynchronous usb is better than spdif everything else being equal - though it will also depend on implementation.  
why expensive streamers
So, if you connect your server to your streamer using an optical cable, and USB from the streamer to a DDC that reclocks, and then a short s/pdif or AES/EBU to the DAC, are the bases mostly covered?  If I understand correctly, what you have is ... 
why expensive streamers
 The sole purpose of this fifo would be to take care of the streamer noise.  I don't think the FIFO (or what I called a memory buffer) can isolate the noise.  I think you may be referring to data jitter - I am talking about ground and power sup... 
why expensive streamers
The memory would assure that the analog noise and timing errors from the server would not affect this DAC circuitry. That is not quite correct.  The buffer memory on the DAC is there to ensure there is no underflow - that is the data will alway... 
An argument for fuses and maybe power cables in power amplifier
^^^ On the other hand, on a poorly design AC-DC conversion amplifier, it will be the bottle neck therefore a power cable or fuse would not make a difference. For example on a cheap Japanese receiver, I doubt the fuse or power cable would make a d... 
Importance of clocking
It is helpful to clarify whether the application is using s/pdif or asynchronous USB. For s/pdif, I think DCS uses what they call "reverse clocking" to minimize jitter in this case an external clock makes sense.  The clock comes from the DAC doma... 
Some thoughts on ASR and the reviews
When basic engineering says they don’t make a difference, and we measure and show that nothing remotely has changed that is coming out of your amplifier, then that is that. It is impossible for there to be a sonic effect when the waveforms have n... 
What if a high end speaker measures really badly?
It could be the measurement was not done correctly.  Here is the freq. response of the Thiel CS2.4 done by Stereophile.  It doesn't look very good, but the speakers are very neutral and sound quite good.