Class D

Correct, that why I like passive preamps also, if correctly implemented, as they have no sound.

Listen to many Class-D’s they have great bass great lower mids, but "something thins out" and looses it dimensionality in the upper mids and highs, like a separate amps has been grafted in suddenly.
This is what I mean they when I say they (Class-D) don’t sound like the A or A/B classics amps, effortless (invisible) from top to bottom without character change at all.

Cheers George

George,

The difference between me and you is I understand feedback, you do not. One of the amplifiers you previously went gaga about Soulution, uses a ton of feedback. You just don't know what you are talking about.

So back the question, how much of the phase shift in the Technics is from the filters, and how much from intentional correction in software? ... inquiring minds want to know.

I don't know George some of the best sound quality  I've heard came from Class D amps in active speakers. Effortless from top to bottom. 

Well, yes good actives do impress, but I bet my bottom dollar those same active speakers can sound better even again, if they were Class-D on the bottom still, but a nice Class-A or A/B linear on the mids and tops or even the Technics SE-R1 then it won’t be hungry for current "if" the speakers are very demanding with low impedances.

The best I’ve heard Class-D was with BelCanto Ref 600m mono blocks, but into a very easy load 2way speaker with Raven 4ohm benign ribbon tweeter, so much did I like it I bought the same Hypex NC500 modules and use the direct with no buffers and in my second easy loaded system, as you have also.
But they don’t stand a chance in my main ESL based system up against this amp, which BTW has much less wattage!!! .
https://ibb.co/qn6Wnms
https://ibb.co/Qncvkkf

Cheers George

Is that the same NC500 you bypassed the buffer clearly violating the recommendations of the app note that the amplifier stage be driven by a low impedance source to maintain performance?

2.5.1 Audio input


The INH/INC inputs form a differential pair. Note that the input impedance is fairly low meaning that
minimalist discrete circuits or valve input stages won’t work. All op amps commonly used in audio can handle
them though. See section 9 for suggested circuits and connections.


Do not drive the input with fully floating sources, be it electrically floating ones like line driver IC’s intended for driving XLR outputs or transformers. Using a floating source will always result in a common mode
component that will exceed the common mode input range and will manifest itself as gross distortion.

Make sure to set the outputs of your distortion analyser to grounded, not floating.

There is also capacitance in that input which means that a high impedance input will cause phase shift and a non flat frequency response.