.....you can daisy-chain forty 7.1 receivers, using pre-outs, to drive 280 main's regiment speakers, the 40 receivers will send LFE to 80 powered subs, think twoooo, or send LFE to strapped amps, and the noise heard or not heard, from the daisy-chaining of the pre-amp sections, will only be as bad as the worst offender, and you'll have a bad time listening to the speakers of every receiver after that weakest link....you're not splitting the signals, they're being passed through hopefully clean and transparent equipment....you can do whatever you want with the pre-amplification millivolted signal until things change to inductant watts....ie, equalizers, compressors, looped tape monitors, other pre-amps, hair dryers, milking machines, etc....