Blown 15" speaker cabinet
I have a Sunn 115BH cabinet with a 15" speaker in it that I replaced some decades ago. Recently I blew the replacement speaker. My question is, I would like to replace the speaker with a higher watt rated speaker as I was using my SWR 200 watt head with it when it blew which may have been too much for the Peavey Black Widow speaker. Do I need to be concerned with the Sunn crossover that is still in the cabinet as far as putting a higher wattage speaker in the cabinet? The original Sunn speaker was rated @ 80 watts continuous.
A driver and it's enclosure should be designed for each other for proper operation. Just chucking another driver in there could be an improvement or, just as likely, a downgrade. Carefully measure the inside dimensions of the box and its ports, if any, and use modelling software like WinISD to choose what driver would be best for the box you have.
The crossover has parts that are rated for 80-100W. Using more power could well be fatal for it.
I've blown the backs off cabinets by putting in a (much) higher rated driver.
I'd do as Paul suggested and find a suitable driver,
and then if possible, replace the XO entirely,
or at least outfit it with higher rated components.
Might check the internal bracing as well.
Is the "crossover" a true crossover?, or just a highpass filter for a tweeter the cabinet contains?
If it's a true crossover ( meaning it also contains a lowpass filter ), then yes, it will also need beefing up, and probably some part value adjustments to play well with the new speaker. You won't know what those are until you've settled on a new speaker.
If it's just a highpass filter ( to keep lows out of the tweeter but does not shave highs off the woofer), then it will not affect whatever woofer you put in there, though the box/porting design still certainly will.
Why is there a crossover in your Sunn 115BH cabinet?
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