Playback Designs MPS-5 - Measerments v. Sound


For all who are curios to read Michael Fremer`s comment
on one of the most controversial reviews in Stereophile (Feb 2010) concerning PD MPS-5 cd player, in which the ultimate question rises again - Can we actually measure perceived sound ?

"Thanks for writing. I would appreciate it if you'd post my response on Audiogon.

It's interesting that you say "it's time to rethink measurement methods" because John Atkinson just took the player back with him to perform some new ones on that player.

It's important to understand that the designer of that player has been at the forefront of DSD technology almost from its inception. Read the bio notes on the Playback website and/or in my review (which was written of course before I had any idea how the player would measure).

Andreas Koch knows what he is doing! That player's measurements are not the result of a botched effort or because he is unable to design a player that will measure as "perfectly" as is expected in conventional terms. Just as it's fairly easy these days to design a speaker that measures "flat" on-axis. But that is hardly the end all and be all of good speaker design!

Atkinson recently met up with Mr. Koch at an event and they had a long discussion about the measurements and that is why JA is revisiting them. The players measures as it does purposely according to Mr. Koch.

Believe me about one thing: you will not hear "noise" as such from that player!

You also understand that there are anti-SACD advocates out there who claim that SACD is not a high fidelity medium! Those include Dr. Stanley Lipschitz, in who I distrust all the time, but he's got the measurements to "prove" his case.

I can "prove" to you that LP playback measures way worse than CD playback but the listening is what counts to me. We don't measure everything. Our brains are far more sensitive than any measurement yet devised. Yes, we also can be fooled but we are also excellent receptors.

JA admitted to me that he's not quite sure what Mr. Koch was getting at in their discussion but that he's open to learning and understanding. JA understands that Mr. Koch is well aware of what he's doing in that design and perhaps one day we'll all understand what he's doing and why what he's done makes that player sound so good.

I suggest you listen to it. Or measure it. If you measure it you may reject it, but if you listen, you might find it's the player you want to own....

-Michael "
papaya

Showing 2 responses by kijanki

Michael - Certain measurement such as noise or jitter are important but spects might be useless. I would not buy , for instance, an amp on specifications alone and would tend to pick for audition one that has poor measurements.

SACD - is one bit PWM scheme similar to class D amps. It is pretty much output of Sigma-Delta converter before filtering. It is used in recording studios in 4-bit wide format known as DSD. Resolution of SACD is equivalent to 20 bit/96kHz. It provides dynamic range of 120dB and frequency range of 100kHz (often CDP limited to 50kHz) - I would say that it is high quality media.
Papaya - How can you expect "intensity" from the source (CD, LP) that has compressed dynamics. Just grand piano alone has huge dynamics that cannot be reproduced without speakers "buzzing" on boom box or cheap system. Audiophiles represent very small buying power - no incentive to make uncompressed media. Higher compression allows higher average loudness that sells CDs.