Quote:
if splitting the signal from the empeg preamp is the least expensive and/or best way to add more speakers into the mix.


It's the *only* way to get more speakers. smile

Here are some options for ways to handle more than four speakers in a system. Please note that it talks mostly about the extra pair of speakers being a subwoofer amp, but all the same techniques apply here:
Empeg FAQ: How do I run a subwoofer if the player doesn't have a subwoofer output?
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Tony Fabris