Puccini+Uclock vs APL NWO 4.0 SE vs PD MPS-5

"There is too much distortion and noise produced by tubes."

Thank you Carlos for your astute observation. Let me also to add something.

Noise: I have new Joule-Electra preamp which got Harry Pearson's 2010 HP Editor Choice Award. OK, when I place my ear next to my speakers I hear...nothing, nada, ziltch. Total silence as in SILENCE. (The measured noise was of about 50 uV).

Distortions: The best BAT, CAT, Joule-Electra preamps have measured distortions (THD) less of 0.01%. Not much!!!!!!

All The Best

Rafael

The long outdated (3-4 years old) NWO-2.5 featured 20 per channel AKM DACs and differential/balanced tube output stage with 6H30 tubes and Lundahl transformers (no negative feedback). Some measurements below.

Here is a graph with 1KHz at 0dB

Second harmonic at 0.003%, third at 0.001%, noise is at below -120dB or 0.0001% above 60Hz. You can see some 60Hz interference picked-up by the output transformers, but at -100dB or 0.001% it is something you cannot hear.

Another graph with 1KHz sine this time at -90.31db showing the resolution at this extremely low level.

All of the above measurements made with CD (44.1KHz/16bit).

Hope this helps!

Best,
Alex Peychev

I suggest you also listen to the new Wadia S7i or the new Burmester 089 or even better the Burmester 069 if your budget can allow it. I personally prefer these over dCS. I have not heard PD.

Somehow, Im not convinced that a thread drive is the best for a device that constantly changes speed, I see it as a better alternative for a turntable system that keeps speed constant?

Wow the PD is impressive it has made no noice since 04-18-10, its completely silent:-)