Using mismatched impedance output jacks?

lunchbox

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I have a Laney combo amp that has internal 8-ohm speakers. There are two other outputs: a 4-ohm and a 16-ohm. The user manual suggests that you shouldn't use more than one output at once due to the mismatched impedance. It says it 'may' cause damage to your amp.

So I'm wondering, what kind of damage could occur? Wouldn't it just wear out the power tubes quicker?

Is it possible to convert one of the outputs to 8-ohm so that I can run an extension cab if I wanted?

:hmm:
 

BigAl

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"May cause damage" is a nice way of saying "will fry your output transformer given enough time."


You said the amp has 2 internal 8 ohm speakers. Do you know if they are wired in parallel or series? Does it say on the amp?
 

rocknhorse1

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An impedance miss match could damage your output transformer.
 

Marshall & Moonshine

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Thats not a double post. He said it twice so youd be sure to hear him. If it didnt matter, they wouldnt label them.
 

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