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Two amps to power 7.1 speakers?

I have  2 McIntosh amps, a MC7205 (5 Chan) and a MC58(8 Chan)   I have 2 Polk Audio RTi A9s a Polk audio RTi A6 center 2 Polk Audio TSi 500s surround and would like to add 2 TSi 200s surrounds.  My Preamp is a McIntosh MX-136  7.1.   Can I run the A9s, A6 and 500s from the MC 7205 and use the MC58, bridged, to get 100w/ch from the MC58 to run the two 200’s.  Running the interconnects from the MX 136 surround ports to the MC 58?  I don’t want to ruin any of the equipment, so if it’s something that may cause harm, I won’t do it and sell the MC 58.
cody57

Showing 3 responses by imhififan

imhififan's avatar
imhififan
2,218 posts
 
Running the interconnects from the MX 136 surround ports to the MC 58?
Connect all 4 surround channel via rca interconnects from the MX 136 surround ports to the MC 58 input 1,3,5 and 7, set all 4 pairs of amp to bridged.
For vertical bi-amp the RTi A9s you can use "Y" rca interconnect cables.
imhififan's avatar
imhififan
2,218 posts
 
Since you're using two amplifier channels for each speaker, the "Y" rca interconnect cables are used to connect the MX-136 L and R output to amplifier's inputs.
BTW, if you want to use MC58 for HF speaker ports and MC7205 for LF ports, it's horizontal bi-amping. 

imhififan's avatar
imhififan
2,218 posts
 
My suggestion is bridge all channels of the MC58 to make it a 4 channel amp to power all 4 surround speakers.
Using 4 of the channels from MC7205 to vertical bi-amp RTi A9s and one remaining channel power the RTi A6 center.

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