B&C 18TBW100-4 or 18DS115-4 in 4Ft^3 Sealed - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 42 Old 03-03-2020, 09:36 PM - Thread Starter
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Quote:
Originally Posted by a77cj7 View Post
I’m assuming the sealed box discussion is off with the 21 anyway, since it won’t physically fit in the diysg box.

If the OP is still wanting to run the tbw in the 4cf flatpack, a 6cf sealed box could be built for the 21.

I would recommend going ported or Devastator with both drivers to maximize output though.


Chris
The DIYSG 4Ft^3 box is finished, i will be puting the driver and testing this weekend, just temporarily. I want to see the woofer working

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Originally Posted by michael hurd View Post
I haven't checked the dimensions of the box he has, though he did mention it would be temporary, with larger enclosures to be built later on.
I will be going ported.

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Originally Posted by Trimlock View Post
This is a great opportunity to use as an excuse to build those enclosures now.


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Yes sir, i have to choose what enclosures to use.

4 Marty cube with the 18TBW100-4 in the back using the XLS1502 and 2 21Cubes with new amps in the front, all tuned to 19HZ, i have to buy another 21SW152-8 and 2 new amps, what amp do you recommend to run the 21's?, and what do you think of this combo?

Thanks again
Luis

Last edited by lkaire75; 03-04-2020 at 05:25 AM. Reason: I made a mistake, i just want to get everything in order-
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post #32 of 42 Old 03-04-2020, 06:22 AM
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Since you already have the 1502's I'd try that first and then see if you need more power to your subs. The cubes are fine but the 21SW can use more, I'd look into a mini-marty or full marty box if you could.
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post #33 of 42 Old 03-04-2020, 07:30 AM - Thread Starter
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Since you already have the 1502's I'd try that first and then see if you need more power to your subs. The cubes are fine but the 21SW can use more, I'd look into a mini-marty or full marty box if you could.
Thank you @Trimlock , Yes, i better cool off, just have so many ideas right now.
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post #34 of 42 Old 03-04-2020, 08:07 AM
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Originally Posted by lkaire75 View Post
Thank you @Trimlock , Yes, i better cool off, just have so many ideas right now.


I agree on running the 1502’s since you have them.

Its hard to gain much above that, even the 2502 is only another 500w.

Chris
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post #35 of 42 Old 03-04-2020, 05:42 PM - Thread Starter
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I agree on running the 1502’s since you have them.

Its hard to gain much above that, even the 2502 is only another 500w.

Chris
Thank you Chris, i will try them with the 1502's, since i'm going to need 4 new boxes i will ask GSG audio if they can sell me 2 Marty for the 18's and 2 Marty for the 21's, probably full Marty's since there is no mini Marty in 21".

Luis
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post #36 of 42 Old 03-04-2020, 05:48 PM
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Originally Posted by lkaire75 View Post
Thank you Chris, i will try them with the 1502's, since i'm going to need 4 new boxes i will ask GSG audio if they can sell me 2 Marty for the 18's and 2 Marty for the 21's, probably full Marty's since there is no mini Marty in 21".



Luis

GSG will definitely do that. They can give you great recommendations on which boxes to go with too.

Chris
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post #37 of 42 Old 03-06-2020, 06:32 PM - Thread Starter
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Hi, i will be assembling the 4FT^3 sealed box with the 18TBW100 tomorrow, according to winisd the Qtc is 0.544, how much polyfill should i add?, something in the ballpark?

Thank you.
Luis
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post #38 of 42 Old 03-06-2020, 06:43 PM
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Originally Posted by lkaire75 View Post
Hi, i will be assembling the 4FT^3 sealed box with the 18TBW100 tomorrow, according to winisd the Qtc is 0.544, how much polyfill should i add?, something in the ballpark?



Thank you.

Luis


I wouldn’t add any.

Chris
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post #39 of 42 Old 03-06-2020, 06:47 PM - Thread Starter
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I wouldn’t add any.

Chris

Thank you Chris.
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post #40 of 42 Old 03-07-2020, 01:05 PM
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I would add a couple pounds regardless. You'll kill a touch of the upper bass efficiency, and gain a fraction of a dB down low. You don't need a ton, and I would NOT overstuff the box. In my experience Fs does tend to drop a touch, never a bad thing in a sealed box. Easy to try.
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post #41 of 42 Old 03-07-2020, 04:17 PM
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Quote:
Originally Posted by lkaire75 View Post
Hi, i will be assembling the 4FT^3 sealed box with the 18TBW100 tomorrow, according to winisd the Qtc is 0.544, how much polyfill should i add?, something in the ballpark?

Thank you.
Luis
I read 1lb per cubic ft. Try 3.5lbs and see how it sounds.

Equipment List: JVC RS500, Darbee DVP-5000S Video Processor, JKP Affinity 100 inch 16x9 .9 gain reference screen, Panasonic UB420, Marantz SR7013 Receiver, 3-Marantz Ma700 and 2-Ma6100 monoblocks, 7.4.2 Atmos, B&W Nautilus 805 front speakers, B&W Nautilus HTM2 center speaker, 2 Volt 6 Atmos Speakers, Mirage HDT-R side speakers, Jamo THX surround one rear speakers, 2 LaVoce 21inch Neo DIY subs and 2 PSA S3600I'S.
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post #42 of 42 Old 03-08-2020, 07:16 AM - Thread Starter
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Originally Posted by Chris Popovich View Post
I would add a couple pounds regardless. You'll kill a touch of the upper bass efficiency, and gain a fraction of a dB down low. You don't need a ton, and I would NOT overstuff the box. In my experience Fs does tend to drop a touch, never a bad thing in a sealed box. Easy to try.
Thank you Chris

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Originally Posted by Mike Butny View Post
I read 1lb per cubic ft. Try 3.5lbs and see how it sounds.
Thank you Mike.
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