mismatched speaker cab question

cbstrat · Jan 27, 2012

a friend of mine told me he was using two cabs with his Carol Ann. 1) 8 ohm and 1) 16 ohm and hooking them up to the corresponding 8 & 16 speaker outs on the head.

Is this the correct way to hook these up or will it harm the amp?

pdf64 · Jan 27, 2012

This will result in half the intended impedance being reflected back to the OT primary; may not be an issue unless it's got EL34s and a high VB+.
Is there a 4 ohm output? If so plug the 8 ohm speaker into the 4 ohm output and the 16 ohm speaker into the 8 ohm output and the correct impedance will be reflected back to the primary.
Pete.

Carol-AnnAmps · Jan 27, 2012

pdf64 said: ↑

This will result in half the intended impedance being reflected back to the OT primary; may not be an issue unless it's got EL34s and a high VB+.
Is there a 4 ohm output? If so plug the 8 ohm speaker into the 4 ohm output and the 16 ohm speaker into the 8 ohm output and the correct impedance will be reflected back to the primary.
Pete.
Click to expand...

Agreed, not ideal, but a lower secondary impedance being reflected back is still better than a higher mismatch. I do know a number of people have done this, but you are putting the amp under more strain and yes, EL34's would show up problems usually before 6L6's. Most of the CA's run a high B+.

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mismatched speaker cab question

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