TC Sounds Epic 12 enclosure - AVS Forum
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post #1 of 8 Old 08-29-2012, 03:04 PM - Thread Starter
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So I have 2 12" epic 12s and 2 Yung 500w plate amps with no boost on the way to my house. I'm looking for the best compromise between output and size. There aren't to many ported buildson the epic and I've read that is the same as the tc1000 and there are few tc1000 builds.

I was thinking 3 cubic feet tuned to 20-22 hz using two four inch tube ports per driver. Thoughts? I read where one guy said the driver begs for 2.5 cubic feet ported, but that seems a little small. I have to make me and wife happy.

Dan
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post #2 of 8 Old 08-31-2012, 09:13 PM
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I ran 2x epic 12" in dual 1.5cu ft sealed boxes driven by 2 bash300 amps. Later switched to an ep4000 feeding them 950RMS each. Sold one off and kept the other as a testing cube. It later failed from moisture somehow reached the internals. I'll admit I was last running it hard on about 2000 RMS for fun, then didn't use it for 6mo. Probably overheated the coil and then somehow not using it condensation ruined it. Great subs that can take so much juice in sealed configuration. Started using a lab12 which so far seems to have similar output with less power consumption.
I'd vote for smaller sealed. You have enough power on them.

"I should really see what dB levels I'm pushing. Long as it can't foam my beer during a movie we are ok "
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post #3 of 8 Old 09-01-2012, 05:11 PM
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"I was thinking 3 cubic feet tuned to 20-22 hz using two four inch tube ports per driver. Thoughts?"

definitely heading in the right direction. the smaller the cab, the longer the ports need to be. two 4" ports at 22hz in 3 cu ft need to be 44" long.

if you go with a 4 cubic footer tuned to 20hz, the two 4" ports only need to be 32" long (and you will pick up a couple extra db from 20-30hz.

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post #4 of 8 Old 09-01-2012, 05:29 PM
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Fitting a pair of 4" ports tuned to the low 20s in 3 ft3 might be a challenge. I agree with porting based on your amp


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post #5 of 8 Old 09-01-2012, 11:03 PM - Thread Starter
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Quote:
Originally Posted by Jay1 View Post

Fitting a pair of 4" ports tuned to the low 20s in 3 ft3 might be a challenge. I agree with porting based on your amp

It'll actually be a slot port, I'll just go with the proper surface area. What do you mean porting based on my amp? The yung amps have a highpass set at 20 or just under 20 hz.

Dan
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post #6 of 8 Old 09-02-2012, 12:15 AM
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the highpass filter built into the amp will reduce spl, air speed, and port chuffing below the crossover point. in combination with the total spl that you are shooting for, that will help determine how large of a cross-sectional area that your port needs to be.

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post #7 of 8 Old 09-02-2012, 01:00 AM
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Quote:
Originally Posted by saabracer23 View Post

It'll actually be a slot port, I'll just go with the proper surface area. What do you mean porting based on my amp? The yung amps have a highpass set at 20 or just under 20 hz.
Dan

You have an amp with no boost, and a 20hz HPF. Paired with a low/mid Qtc woofer, a ported box makes sense. Sealed will get you solid woofer performance, with an f3 in the mid 40hz range. It could be a good choice in a tiny room, but the 20hz HPF is still cutting off the response, so you might as well maximize output down to that point by porting.


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post #8 of 8 Old 09-02-2012, 06:05 PM - Thread Starter
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What would you say is the volume taken up by the epic 12?

Dan
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