amplifiers

[<chris>]

how do you cross two amps together without damaging

anything.

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[godfather]

Turn the music signal from one amp 180% out of phase compared to the other.

Then connect the two +'s of the speaker outputs of the two amps to the + and - inputs of the single subwoofer.

You don't use the two - speaker outputs of the amps.

So your subwoofer sees; double the output of a single amp, but beware of the dangers, this is getting serious.

If you're not completely confident of what you're doing, contact a local caraudio dealer (with experience with SPL cars).