Maybe I'm not understanding you, but it sounds like you're asking for a stereo preamp with six (5.1) HT passthrough channels? If so, I feel safe in saying one does not exist. Stereo preamps only have two HT passthroughs at most. If I've misunderstood you, please provide more info about what you're looking for, and we'll see if we can be of help.
preamps with 5.1 and ht passthroughs ?
I am looking for a preamp to match my krell hts , I need a ht passthrough and would like a 5.1 connection most I have looked at only offer 2 channel inputs, are there any that offer the 5.1 also, thanks