Please help, single input, multiple outputs

It sounds like you want to put multiple speakers on one channel. Instead of finding an amp with multiple outlets per channel, maybe the search should/could be for a series of connectors or splitters so that you can branch out from a single cable into a number of leads going to your speakers.

I am not knowledgeable enough to address the other issue of how your arrangement might over-tax your amp or diminish the sound quality of those speakers. Someone else may address that for you.

Just curious, but why do you want to run 4-5 speakers off of one channel? Can you explain a little more about your set up?

I assume you want all the speakers active at the same time rather than switching speakers. If that is your goal, you can get a RCA distributor amp which will split a single RCA input into multiple RCA outputs. You than connect the outputs into the inputs of a multi-channel amp.

Google "RCA distributor box" or "RCA distributor amp". You should be able to find many products at different price range and features.

Perhaps this will help http://bryston.com/4switch.html.

I have not used it, so I can't vouch for it, but perhaps it will help you.

They're called distribution amps that are able to distribute one input throughout multiple outputs.
The proper source for that to shop is bhphotovideo.com in section pro-audio ->> distribution amplifiers.

"I know that many amps output to multiple speakers (for home theater), but they all seem to have only one output to the one input channel. " If you set this to ALL-MONO, the single input will go to all outputs.

Kal