Cutting holes in bulkhead for stereo speakers? - SailNet Community
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post #1 of 24 Old 04-12-2010 Thread Starter
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Cutting holes in bulkhead for stereo speakers?

I'm looking to install a pair of 6x9 inch speakers in my 23' Sovereign. The only place to mount them would be in the bulkhead so they face out into the cockpit. Does a hole of this size compromise the strength of the bulkhead?
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post #2 of 24 Old 04-12-2010
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Probably not, but to be on the safe side you could add a 3/4" marine plywood or similar reinforcement to the bulkhead, then cut the hole through the thicker section.

If the speakers aren't waterproof...you may be better off buying two smaller "bookshelf" speakers and hanging them on the rail when you want to use them. Less holes that way, too.
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post #3 of 24 Old 04-12-2010
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First, don't get 6x9 speakers... they have more distortion than 6" round speakers and really aren't worth the money.

Second, if the bulkhead you're mounting them into opens into the boat's interior—do you really want the only thing between a wave pooping the boat or a knockdown and the interior of the boat to be the thin cones of the speakers? The speakers should be mounted behind deckplates that can be closed off in the case of heavy weather.

You also want to be careful where you mount the speakers to make sure they don't screw up your compass.

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post #4 of 24 Old 04-12-2010
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Whether it's wood or FG, I would say no it wouldn't, on our 26' Islander I had a 2 pair of 4" dia. instruments ( 1pr on either side of the companion way ) on the bulkhead no issues ever.

I also had 6x9's on the interior bulkhead face the cockpit, again no issues

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post #7 of 24 Old 04-12-2010 Thread Starter
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Sorry, I should have been more specific. The bulkhead I want to mount them in is the wall inside the cabin dividing the v-berth and main cabin which is also far away from the compass. The speakers are not waterproof but will be inside the cabin and have rubber surrounds with plastic cones. A buddy of mine has 6x9 car speakers inside his cabin and they sound great. I just wanted to make sure it wouldn't weaken the bulkhead too much.
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Oh, in that case... The deck plates don't matter... I would still recommend getting round speakers, rather than the 6x9's since round ones have better sound qualities.

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Sorry, I should have been more specific. The bulkhead I want to mount them in is the wall inside the cabin dividing the v-berth and main cabin which is also far away from the compass. The speakers are not waterproof but will be inside the cabin and have rubber surrounds with plastic cones. A buddy of mine has 6x9 car speakers inside his cabin and they sound great. I just wanted to make sure it wouldn't weaken the bulkhead too much.

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post #9 of 24 Old 04-12-2010
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Nah, your good, my 6x9's ( wired to a Sony xplod )kicked arse also and were located in the same bulkhead as you're intending

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