3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 41 Old 07-30-11, 10:35 PM Thread Starter
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3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

Well I finally got all my pieces and started building this week. I had a stroke of luck at a local specialty lumber store near me and found 3/4" mdf with fir veneer on one side and cherry veneer on the other. I am using the cherry side for my box. It was just over 4 cu.ft. to start , but with the driver and bracing it is about 3 3/4 cu.ft. now. the 1/4 round is maple. here are a few pics to start.
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post #2 of 41 Old 07-30-11, 10:37 PM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

I want to stuff the box to make up for lost space. Is it safe to use loose polyfill with the plate amp, or am I better off using pillows with polyfill?
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post #3 of 41 Old 07-30-11, 11:24 PM
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

Nice box. Pillows would be easier since the plate amp is an open back design.




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post #4 of 41 Old 07-31-11, 10:26 AM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

Thanks Mike. Couldn't have done it without your help. Hopefully I can finish staining and varnishing this weekend and get this sucker assembled. hopefully have some more pics soon.
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post #5 of 41 Old 08-01-11, 08:41 PM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

stain and 3 coats of varnish just finished. more pics to come tomorrow.
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post #6 of 41 Old 08-01-11, 10:18 PM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

here's a few pics to show what I am replacing.
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post #7 of 41 Old 08-01-11, 10:26 PM
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

Looks like early Halloween...sweet!


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post #8 of 41 Old 08-02-11, 09:44 PM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

I used polyfill pillows to stuff the box. One pillow is close to the plate amp. Is that going to be an issue , or should it be ok. I left the pillows loose in the box, should I staple them down?
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post #9 of 41 Old 08-02-11, 10:12 PM
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

I wouldnt worry to much about affixing the stuffing. The plate amp has it's heat sink on the outside so most of it's heat will travel that way.

I ran one of those plate amps powering a shiva-x and a pair of Peerless xxls 12's (not at the same time) and it never really got that hot.

I do recall that amp having some built in low end boost. Try and remember that when tuning. It would be smart to look into it. If I remembered how much and at what frequency I'd tell you bit I honestly can't remember. I think it is really low around 20hz or something.
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post #10 of 41 Old 08-02-11, 10:46 PM Thread Starter
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Re: 3.75 cu.ft. sealed sdx15 w/ oaudio 500w plate amp

I won't get a chance to play around with tuning until the weekend. It has selectable boost at 12, 16, 20 and 25 hz. Modelling in winisd shows going over xmax at the 16 hz setting but it won't hit xmech. I have it at 20 hz right now.
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