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Old 16th April 2009, 02:54 AM   #11
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Originally posted by Cal Weldon
Well, the damper is only good down to a certain frequency. If the cabinet is resonating, it won't help. It's best suited to frequencies 100 Hz znd up. If there is resonation, consider some light bracing. The side with the high pass, you might want to leave open backed.

do i really have to leave the back open on the top? the eminence site says the man o wars are good for open back or sealed. I just think it would look weird having a whole on the top half of a half stack
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Old 16th April 2009, 02:56 AM   #12
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Yes it would look weird but we're not talking looks. It's up to you, why not try and see what you like?
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Old 16th April 2009, 08:33 AM   #13
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Make a backplate which you can take off

See which sounds better
My work: www.grimshawaudio.com
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Old 16th April 2009, 04:38 PM   #14
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There are lots of commercial 4x12 cabinets that were made with a open top half. It's not that unusual. As for box resonance, box size, tuning or lack there of, damping........
It's not a hi fi speaker or even a bass speaker.
This as an electric guitar speaker system, to go with an electric guitar amp. Non linearities are part of the sound.
Rock on!
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Old 23rd April 2009, 04:13 AM   #15
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thanks everyone for their thoughts. im separating the top and bottom with a 'shelf' as i call it. and im just gonna make it completely sealed except for a removable back plate which i dont really have to worry about it letting anything through. im also adding some speakon/ 1/4" combo jacks on the back for better connectivity
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Old 23rd April 2009, 11:43 PM   #16
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Originally posted by chris661
Ok - so it's a guitar amp

Go for 4x12" guitar speakers, all the same, and you don't need to cross-over, or use bass-port.
I use 4 off 10 inch speakers in my guitar speaker cabinet.
There go upto 18KHz and are very loud.

I found blue aran a great cheap source of speakers.
Murton-Pike Systems PCBCAD51 pcb design software. http://www.murtonpikesystems.co.uk
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