how good is the Krell HTS 7.1 pre-amp for 2ch?

Why do you need to modify the amps if you use a tube preamp? If you are concerned about dc offset, the Krell has a jumper inside that will allow you to use a tube preamp. No modification is needed. I had the same amps.

Thanks all for the responses.

Sfstereo - I have not cracked the case open, just going by the manual which says take the amps to a dealer for modification or bad things could happen. Do you have some instructions on how to do this? I woudl not know where to look.

Sacman, I was a little confused reading the post. Do you mean the 7.1 is about 80% of the KCT's performance?

Amazingly I actually have an Audio Reseach dealer in Atlanta who thinks a Ref5 pre may not require the amp mod and who is willing to let me audition at home. Will keep you posted

Yep. I personally feel that the HTS 7.1 delivers 80% of the KCT's performance. In 2-chan mode, I haven't heard better HT processor yet, including the Cary 11b and the Theta CBIII.

I have a HTS 7.1 feeding a FPB-600c and have put it against a:
Krell HTS 7.1($1800-used)
Krell KCT($3600-used)
Sim Audio P-8($6500-used)
Gryphon Mirage($13,000-used)
this was all in the same day on the same gear,only the preamps were changed out.

The result was in order of cost and so it should be but all were marginal differences except the Gryphon was an exceptional difference from the HTS
I found the KCT was a great bargan for $3600 sound wise,BUT"""HOT"""
Sim was very sheer and analytical sounding
the Mirage was ""NICE"" but $$$$$$
Allin all for 2ch the HTS is a winner and you can use it for SACD surround and 2ch+sub
enjoy

Thanks McIsoind,

Audio Research says no issue with their Ref5 pre-amp and the Krell amps. I have found a store willing to let me audition the Ref5 at home. We will see if it makes much of a difference. I actually hope it does.