I only know the 1200 poer amp of old and this one sounded grainy and thick when first switched on. After a few hours it massively improved, but as KJ developed as an Ab Sounds outlet primarily, the Chord was sold off and that was it, as far as I'm aware..
The Bryston pre I had was the BP25 with phono stage, using discrete class A gain blocks. After 24 hours, the sound was significantly better, almost sweet toned and very much clearer. The BP26 which replaced it had a couple of component (quality?) tweaks inside and a much larger and more expensive power supply, with separate rails for each stage (although it could also be used as an upgrade to the model I had). I suspect this answered much of my initial findings by tackling the important bits and getting the circuit stable more quickly, if you see what I mean.
If you're happy to leave on, then great
This maker does spend a goodly amount on finish and construction too...
I can't go on and I can't go back, I don't feel so matter of fact,
I tried and tried to make good sense, What's the good to try it all again?