Dual RL-p15 D2 LLT Sub Project... - Page 6 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #51 of 177 Old 02-15-07, 02:27 AM Thread Starter
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Re: Dual RL-p15 D2 LLT Sub Project...

True... I can take measurements first. Even with the SBS-01 system I use 80Hz... I may try 100Hz, but there could be localization issues with those rear subs, that's one reason I wanted to keep it at 60Hz back there.
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post #52 of 177 Old 02-15-07, 09:19 AM
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Re: Dual RL-p15 D2 LLT Sub Project...

One last thought. This assumes side or front firing drivers.

If you need extra volume for this enclosure, look down. It appears that you are placing the sub(s) on a platform. I suspect that if you wanted to go hog wild you could get as much additional volume as you want/need by opening the bottom of the cabinet and put a hole in the platform, mounting the bottomless cabinet over the hole.

This might entail pulling the floor partially up to beef up the cavity, put in the appropriate cross pieces for volume, seal everything, etc. This should allow for a smaller box behind the recliners.

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post #53 of 177 Old 02-15-07, 09:35 AM Thread Starter
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Re: Dual RL-p15 D2 LLT Sub Project...

I think I'm good on volume and have some room to get more. There are some good cavities in that riser though, but I'm not sure how well sealed they are with wires going from one cavity to another, etc. It would definitely be a complicated case of having to remove the carpet and I know the floor is liquid nailed to the floor joist.


I would still like you guys opinion on using PVC for the port, the binding posts and do I need polyfill. Thanks!
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post #54 of 177 Old 02-15-07, 09:44 AM Thread Starter
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Re: Dual RL-p15 D2 LLT Sub Project...

I'm not sure what I was thinking, but I'm moving this to the SoundSplinter forum.
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post #55 of 177 Old 02-15-07, 09:50 AM
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Re: Dual RL-p15 D2 LLT Sub Project...

Sonnie:

I understand, it would be a lot more work.

Should I ever have the opportunity to build a purpose built home theater I have always envisioned using the platform for my sub(s). Living in S. Florida, we don't have basements, and attics are very hot most of the year, so IB's are fairly impractical. SAF dictates unobtrusive, plus I hate to waste space.

It's a shame you weren't just building the room

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post #56 of 177 Old 02-15-07, 09:58 AM Thread Starter
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Re: Dual RL-p15 D2 LLT Sub Project...

Yeah, when I built that room I had never even heard of IB or LLT subs and would surely never have thought of doing anything with the riser. That is some really good space that could be put to use though.
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post #57 of 177 Old 02-15-07, 08:43 PM
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Re: Dual RL-p15 D2 LLT Sub Project...

Why you guys don't like slotted ports???
I don't used round ports any more when I build boxes, I build slotted ports or triangle ports, it's easier build the port when there is not enough depth for the round port.

Dual RL-p15 D2 LLT Sub Project...-img_0784.jpg

Dual RL-p15 D2 LLT Sub Project...-img_0785.jpg


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post #58 of 177 Old 02-15-07, 09:44 PM
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Re: Dual RL-p15 D2 LLT Sub Project...

Rodney, nice job on those ports. I don't see anything wrong with those

Sonnie, if you're set on an 8" port, why not 8" diameter sonotube for the ports? I've seen that done a few times.

Some food for thought...WillD uses a 6" precision port with his TC-2000 LLT and hasn't reported a single port chuffing issue.

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post #59 of 177 Old 02-17-07, 01:09 PM
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Re: Dual RL-p15 D2 LLT Sub Project...

8" would be too large for a single RLp-15 sub with a low tune. Slot ports create more turbulence than a cylinder, especially when 90 degree angles are used, and one of the goals of a LLT is to eliminate all potential air movement issues with ports. Stick with cylindrical ports if at all possible.


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post #60 of 177 Old 02-17-07, 02:35 PM Thread Starter
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Re: Dual RL-p15 D2 LLT Sub Project...

I'm not sure what I can find in 6" tubing, but Montgomery is pretty big. Rodny may know somewhere where I can get something similar to Sonotube... but I'm thinkin' it's probably gonna be easier just to pick up some 6" PVC pipe.
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