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Thunderbird Club

Question on mixing cabs. My Sunn 215m is 4 ohms. If I get the Trace Elliot, it is 8 ohms. If I run both into the Sunn head (200w @4 ohms) will that cause any issues?
The resulting impedance the head will see would be 2.67 ohms. The Sun head probably isn’t rated for less than 4 ohms.
Also the 4 ohm cab would get twice the power than the 8 ohm cab, so you might not hear the 8 ohm cab.
 
The other alternative is connecting to my Music Man Sixty Five. The 115rh is 8 ohms and the amp has a switch for 8 or 4 ohms.

That would be the way to do it.
Another thing to consider though, but don't know if it matters a whole bunch.
Is the efficiency of each cab.

But @Engle is on point though.
You need to at least be able to distribute the power evenly.
Did you say you want to run the 115 and a 410?
 
That would be the way to do it.
Another thing to consider though, but don't know if it matters a whole bunch.
Is the efficiency of each cab.

But @Engle is on point though.
You need to at least be able to distribute the power evenly.
Did you say you want to run the 115 and a 410?
210. I decided the 410 was too big.
 
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Ok, how do you chain amps?

I would think that he meant to run each amp to each speaker.

Yeah.
You'd have to have at least one amp that had special input/output connections (similar to what my Mark IV Peavey has?) That would allow usage of the power amps of both heads - otherwise, with the typical connection method, you'll get the pre-amp of one and the power amp of the other, which won't give you what you want.....