[nodiak]

I've been using 8 ohm main speakers for awhile and am thinking to try some bipoles that are 4 ohm nomnal.
Does the sub I have connected at speaker level effect the impedence the amp sees? (~ Like having 2 pairs of speakers in parallel?) I haven't worried about it with 8 ohm speakers, but maybe should for 4 ohm.
I know I could go 16 ohm on the bipoles but I want the efficiency of 4 ohm.
Don

[mgalusha]

I believe the speaker level inputs on most (all?) sub amps are much higher impedance than your speakers and should have no impact.

[KS]

The sub has its own amp, so the speaker wire signal isn't powering the sub driver, it's just a signal to the amp.  It is not like you have the sub and main speaker driven in parallel.

[nodiak]

Thanks guys, that's good news.
Don

[IronLion]

I recently tried this out for my setup (speaker level inputs to sub) and it works very well.  No issues at all with the amps.