Originally Posted by JabJr
ok, here's my setup, aiwa head with only rear rca outs, 4 polk ex602a all around powered by the head. the el receiving sound signal from hi level rear speakers. if i amp the 4 main speakers and jump from the rear speakers like i currently have it set up but now amplified, won't that cause a problem with the sub's amp and possibly blow the rear speakers because of the reduction in impediance?
No, this does not change the impedance of the speakers as you are not powering the Tube from these speakers, you are only using the speakers to create a signal source for the Tube. The Speaker Input Section on the Tube is capable of handling high voltage so powering your speakers with an external amplifier will not harm anything.