lanx0003

Responses from lanx0003

Could Class D really be that good?
@eddnog  I didn’t see any results from anywhere testing the V3 Mono specifically with a 5A power supply versus a 10A, making it even more difficult to say. Erin just shows the test result today. 'Single' means single amp fed by 48v, 5A psu and ... 
Could Class D really be that good?
Ric, I really admire what you do and wish I could learn that skill set someday. It's a pretty good review, and I congratulate you on the impressive 9.5 out of 10 score you received for your mod. I agree that measurements do not imply sound qualit... 
Could Class D really be that good?
Alright, it is fun discussion but counter-productive (to me) talking these technical issues phyosophically.  Call me stuborn but, before making any major purchase / investment, I would like to see positive / superior objective measurements on the ... 
Could Class D really be that good?
I don't believe it's necessary for components to be of poor quality to show disparities in measurement. Take the Fosi V3 and Aiyima A07 as examples. Both of them use the TI TPA 3255 module, but Fosi utilizes quality passive parts like Japanese/Ger... 
Cool running, low powered power amp
CODA has a lot of 'fins' and Krell 175xd gets a lot of fans (4) in the back.  Won't you be bothered by them?    
Seeking Bookshelf Recommendations
+1 Buchardt S400 Mk II which I believe it has been recommended.  
Music first or sound first?
Without good sound, I could not enjoy the music. Hard to separate them.   
Cool running, low powered power amp
+1 BM ahb2.  class H (class A/B w/ voltage rail regulation) with 92% efficiency. Cool running device in a small form factor.  Highly recommended if you are willing to make an invest.  Otherwise, for $660, you could consider Smsl vmv A1 10 watt cla... 
Could Class D really be that good?
@ricevs Thank you for the write up / advices. I pretty much agree with what you said there regarding the sound signature heavily depending on how the modules are implemented. The reason I put so much effort there investigaing measurements is bec... 
Could Class D really be that good?
@mattw73 I’m impressed with both the Nilai Mono and Apollon St in terms of their specifications. However, I lean slightly towards the Apollon for a couple of reasons: (1) it offers 25% more reserved maximum power in both 4 and 8 ohms (despite a ... 
Could Class D really be that good?
@atmasphere So if a class D has the same distortion signature as a good tube amp, it will sound like a good tube amp simply on that account. Agreed. But I want to emphasize, with the low 2nd HD found in these Purifi / Hypex class D, you won’t b... 
Could Class D really be that good?
@atmasphere  I was there initially but just like asr said "... The third harmonic hovers around -130 dB which again, is almost at the limit of what we can measure..."   It is inaudible either at that noise floor. I am sure that, with such a low n... 
Could Class D really be that good?
@atmasphere Just look at the harmonic spectra of the Purifi module. You’ll see a dominant second. These are freq. spretrum FFT plots for THD and IMD from the published Purifi 1ET400A data sheet. For IMD, all spikes are beyond the audible freq. ... 
Could Class D really be that good?
@atmasphere Thank you for the very helpful information. I recalled someone asking / commenting about the musicality and I have examined all the ASR measurements but could not find one appropriate to be an indicator.  After a brief search I was onl... 
Could Class D really be that good?
I could not agree more, @pindac. Such a ’bybrid’ amplification could be even better on a active crossover system. A good (mini)DSP could easily lead us there, which will be more convenient than the passive crossover system. A lot of class A / tube...