FYI, Cambridge Soundworks (was based in MA) and Cambridge Audio (based in the UK) are two separate entities. Cambridge Audio is likely the manufacturer you meant as they're often mentioned in such lists, whereas CSW has gone nowhere fast since Creative Labs bought them way back when.
Sorry, typo. Meant Cambridge Audio
I am very familiar with CSW. I had a friend who managed one of their stores here. They were bought by Creative Labs because they were basically going out of business.
And FWIW, I've owned (and continue to own) some HK receivers (stereo and surround sound) as well as Onkyo, and I've never noted any drastic difference between them (aside from differences resulting from room correction). I even hooked a HK 3380 up to my Onkyo TX-SR707 as a little experiment with no particular result. Of course, YMMV.
The differences are there, but they are small, and that's why I mentioned that class A/B isn't the answer. Not so much with the stereo receivers, because people generally connect them via analog. When using digital, the receiver is doing everything and there is a definite difference between them that is not just the DACs, but everything in the chain within the receiver itself, that imparts a slight coloration to the sound IMO. I can hear this in my system - My Marantz has a definite sound and I always enjoyed it, but I prefer the sound of my Oppo via analog, and the difference is easily audible.
Over the years, I've listened to a LOT of receivers and amps and I also can't say there are huge differences between them either, but in some cases, there are definitely small ones that are audible. Enough to change the sound significantly in a given application? Not enough to make a night and day difference IMO. For the stereo receivers, I'd say most would be hard pressed to tell the difference between the Onkyos and H/Ks.
In this case, the OP is interested in a particular sound (tubes and vinyl
) so a little experimentation will likely turn up some very specific traits that he is after, though I personally don't feel that is the right way to go about it