RB-Kit in the ceiling - Surrounds - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 18 Old 04-10-09, 04:11 AM Thread Starter
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RB-Kit in the ceiling - Surrounds

Here's another of my build threads.

I bought a set of 4 RB-Kit speakers from Madisound. ...Enough to complete my surround speakers. I wanted to test these kits out and see whether I would be pleased with them and whether they would fit in with my Natalie P's mains.

This is my build thread for building and mounting the enclosures in the ceiling.

After modeling the woofer, a 0.5 CF box optimized the bass response with a port tuned to 48Hz. I wanted to put these guys in the ceiling with minimal presentation in the room. That meant that most of the box would have to go in the ceiling.

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post #2 of 18 Old 04-10-09, 04:13 AM Thread Starter
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Re: RB-Kit in the ceiling - Surrounds

The box is designed to be 22.5 inches long, which is perfect spacing between trusses in the ceiling. I plan to mount the speaker to the trusses and have the angled part of the speaker poke through the drywall along with the bass port.





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post #3 of 18 Old 04-10-09, 04:15 AM Thread Starter
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Re: RB-Kit in the ceiling - Surrounds

So here I am planning for the bass port. I glued a bunch of blocks to gether so I could drill through it for the port. The other little square with the hole in it glued on was an abandoned plan for adding a port, but it was already glued on.

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post #4 of 18 Old 04-10-09, 04:17 AM Thread Starter
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Re: RB-Kit in the ceiling - Surrounds

So here I am getting ready to and drilling the hole for the bass port. This port is 1.5" wide and 2.75 inches long It is all wood and this method was very easy to do. I think this was the easiest method for installing a bass port in a box that I have tried.



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post #5 of 18 Old 04-10-09, 04:21 AM Thread Starter
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Re: RB-Kit in the ceiling - Surrounds

So here are some more photos of the flaring processes. I think you can see the router bit I used to flare the inside and outside of the port. It makes flaring trivial.





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post #6 of 18 Old 04-10-09, 04:25 AM
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Re: RB-Kit in the ceiling - Surrounds

great idea for the port. I never would have thought of that
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post #7 of 18 Old 04-22-09, 11:23 AM
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Re: RB-Kit in the ceiling - Surrounds

I can't wait to see how this goes. I was thinking of doing the same thing to pair up with my infinity beta 20s.
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post #8 of 18 Old 04-22-09, 02:35 PM
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Re: RB-Kit in the ceiling - Surrounds

This is an amazing idea! I was wondering if you could post up an approximate cost of the entire build. I have been pondering how to get the best placement while getting the rears off the ground. As the rears I have now are rear ported, this was never an option. But now I see the error in my thinking. I never considered building similar units to my BA CR85 mains and using the other two elsewhere.

Good stuff. I will definitely be following this build.
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post #9 of 18 Old 04-22-09, 03:52 PM
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Re: RB-Kit in the ceiling - Surrounds

Im loving this creativity. Keep up the good work!

My HT equipment

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post #10 of 18 Old 04-25-09, 07:40 PM Thread Starter
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Re: RB-Kit in the ceiling - Surrounds

Quote:
filtor1 wrote: View Post
I was wondering if you could post up an approximate cost of the entire build.

The cost:

--------------------------------------------------------------------
RB-Kit $59.00 x 2 + shipping $15.00 = $133 (Madisound.com)
4'x8' Sheet of MDF = $27 (@Lowes)
1 Large bottle of wood Glue $4 (Walmart)
Speaker Wire $10
Misc other stuff (insulation, a few screws, etc laying around) $0
--------------------------------------------------------------------
Total $174 for 4 Vifa rear surrounds. (So far I've only posted the build for the 2 rear channels)

NOTE: I'm adding some pics for the other two surround speakers now...

Last edited by keelay; 04-26-09 at 04:27 AM.
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bass port , ceiling , diy speakers , madisound , natalie p surrounds , rb-kit

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