Amplifier brand/designer with the most unique and consistent “house sound?”

@atmasphere

Different resistors, capacitors, wires endow amplifiers with unique and often predictable coloration/qualities.  Do these components vary in their distortion/phase attributes in predictable/measurable ways?  Or are other characteristics of these parts contributing?

@optimize
“It would be interesting to compare ACA against a ncore. NC400 that is on the other end of the scale and is one of the best measuring amps.

I guess that NC400 is one of those amplifier without any house sound with almost no distortion at all.”

I built the Pass ACA amp, the 1.8 with 8wpc, and use it in my office system. I also read the review on ASR about it before I bought and built one.. I’m driving a pair of NHT S1’s with them rated @86db sensitive.. This is when ASR lost all credibility with me as the ACA amp just sounds GLORIOUS and produces all the volume I need and then some !! I also owned a pair of Bel Canto Ref600 monos based on Bruno’s Hypex NC400 modules for a couple of years. I’ll take the old inefficient Class A topology w distortion and low power sound over class D specs and sound anytime ! I liked your system vid... sounds good even with crappy phone..
Here is one of mine.. my first iPhone crappy recording..
https://youtu.be/vqMqGV342m0
https://youtu.be/yB12zq-UKHI

@mikem thanks for the insight and your kind words.
Good sound you have there! 😀🎶🎵

Different resistors, capacitors, wires endow amplifiers with unique and often predictable coloration/qualities.  Do these components vary in their distortion/phase attributes in predictable/measurable ways?  

Yes. Its also predictable that if a part such as a capacitor or resistor does not measure as well as another part of the same value (assuming that the values are identical) that when the inferior part is installed the circuit will not perform as well. Sometimes the differences are very slight, sometimes not, depending on where in the circuit the part is installed, since certain parts of the circuit are more critical than others. 

For example I've seen capacitors of different types but the same value have an easily measured difference in high frequency bandwidth. Resistors of course can have lower noise- and this is no secret or weird snake oil; Ampex used low noise resistors in critical points of their tape machines back in the 1950s.

@atmasphere fascinating and clarifying. Thank you.