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Audio research and krell

So here goes I have a arc ref 5se and I am using a krell Kas 300s and recently I noticed the krell was making some noise when powered off so I made some calls to krell and found out that the older krell amps are not recommended to be used with tubes I have never heard this .so has anyone here heard this .second  question if that's the case what should I move to for a new amp I like the krell sound. Speakers are revel salon 1 transparent cables

tunawishing
ghdprentice
6,858 posts
 

Well, that is one of the craziest things I have heard, not with tubes. I understand the Krell thing… many years ago. A friend of mine has an old Krell. There are lots of other really good options given your system. Your speakers are pretty inefficient… what is your budget? My first thought is a Audio Research Reference 160m or s. I think This would be an amazing combo. I used to have an ARC5se… before I upgraded to the 6SE. What kind of music and budget?

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jjss49
6,612 posts
 

+1 @ghdprentice 

the krell downstream has no idea if the preamp plugged into it has tubes in it or not...

invalid
1,153 posts
 

There was a certain BAT tube preamp that had a problem and was putting out DC into amps. I've been running a tube preamp into a krell ksa300s for about 5 years now with no problems.

tunawishing OP
17 posts
 

Ok that's kinda how I felt I  checked for dc voltage on the out puts on both single ended and rear. 4 mv to start and after about 30 seconds nothing. I listen to just about everything I have an opportunity to get a pair of krell 450 mcx but not sure that what I want 

erik_squires
16,013 posts
 

AFAIK, Krell is DC coupled. If your preamp puts out any DC at all it can cause a problem. The solution is really simple, put a cap in series. 2 to 4uF should do.  Get as fancy as you'd like. :)

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