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TapeOpCon 2006 Bass Trap

 
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gsmelley
audio school


Joined: 03 Nov 2005
Posts: 3

PostPosted: Thu Jun 22, 2006 1:41 am    Post subject: TapeOpCon 2006 Bass Trap Reply with quote

Can anyone that shed any light on the design and building materials of the bass trap that was sitting outside the Coronado rooms for most of the weekend? I missed whichever panel/workshop that was discussed in.

I had a great time at the con!

-gory
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gory smelley
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drunton
pushin' record


Joined: 19 Jul 2003
Posts: 257
Location: Cary, NC

PostPosted: Thu Jun 22, 2006 1:53 am    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

It was discussed during the first "Treat your 2.0 Room" Panel

Someone please correct me if I am wrong:

The frame is whatever it takes to hold it all together with some bracing. 1 x 10" or something like that.

The diagonal slats were made of "ductboard". A relatively hard to find board material used to make air ducts if you don't use that piping stuff. It is kind of flexible and can vibrates with the bass notes.

In between the ductboard you put the 703,704,705 Corning densified fiberglass.

Put an acoutstically transparent fiber over the front side, solid on the back.

Hang as many as you can in the back of your room - not stuck to the wall directly, but hanging since they will absorb more energy this way.

Sorry - that's all I have in my notes...
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thewelfareline
takin' a dinner break


Joined: 21 Jun 2003
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PostPosted: Thu Jun 22, 2006 12:23 pm    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

there are some faults in the previously stated information.

firstly these arent meant to be built so small, they are meant to encompas a large portion of the wall.

they are not meant to be spaced off the wall. this method is used with framed 703 fiberglass.

and the insulation "stuffing" between the slats was not 703, it was a less dence insulation

and on the back side of the trap it looked to have the rigid fiberglass insulation
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gsmelley
audio school


Joined: 03 Nov 2005
Posts: 3

PostPosted: Thu Jun 22, 2006 7:34 pm    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

thewelfareline wrote:
there are some faults in the previously stated information.

firstly these arent meant to be built so small, they are meant to encompas a large portion of the wall.

they are not meant to be spaced off the wall. this method is used with framed 703 fiberglass.

and the insulation "stuffing" between the slats was not 703, it was a less dence insulation

and on the back side of the trap it looked to have the rigid fiberglass insulation


So, ideally, what dimensions should they be?

Thanks.
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gory smelley
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goldstar
takin' a dinner break


Joined: 08 May 2003
Posts: 171
Location: Denver

PostPosted: Fri Jun 23, 2006 9:48 pm    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

The design for the bass trap was by Eric Blackmer of Blackmer Sound. The plan he gave me to build it was a little sparse on details, so I improvised a little, and also used some material Craig had on hand to save $. You might be able to sweettalk him into a copy of them, though I'm not sure.

The face of the traps is ductboard, an air-conditioning product available from HVAC suppliers. 1" 703 would work also. The louvers on the inside were made of soundboard (Celotex), though Eric says other material like 1/2" drywall would work too, though it makes the effective freq. lower (stiffer material takes lower freqs to move them). The backs were 3/8" plywood; he spec'ed material 1/4 to 1/2" thick. The material on the inside is regular R-13 insulation.

Eric's website is www.blackmersound.com

Hope this helps.

Frank
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wayne kerr
ears didn't survive the freeze


Joined: 08 May 2003
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PostPosted: Thu Jul 06, 2006 5:29 pm    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

vomitous
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Glory_Morris
takin' a dinner break


Joined: 06 Jan 2005
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PostPosted: Fri Jul 07, 2006 4:29 am    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

This is an interesting topic, but frankly I am VERY confused. Who's right?
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Scott R. foster
audio school graduate


Joined: 18 Jul 2006
Posts: 12
Location: Jacksonville, FL

PostPosted: Wed Jul 19, 2006 11:09 am    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

Here is a cheap and effective bass trap If you have modest carpentry and upholstery skills, these are the the cat's pajamas. If not, our firm sells zip up bags that allow you to use your "make your bed" skills to achieve results as good or better as building your own. Laughing

http://forum.studiotips.com/viewtopic.php?t=534

Not as cheap.. but very nice: Cool If you are building a room, it would be pretty easy to build these into the corners.

http://forum.studiotips.com/viewtopic.php?t=535
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gsmelley
audio school


Joined: 03 Nov 2005
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PostPosted: Wed Jul 19, 2006 2:43 pm    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

wow! thanks Scott. lot's of really good info here!

Scott R. foster wrote:
Here is a cheap and effective bass trap If you have modest carpentry and upholstery skills, these are the the cat's pajamas. If not, our firm sells zip up bags that allow you to use your "make your bed" skills to achieve results as good or better as building your own. Laughing

http://forum.studiotips.com/viewtopic.php?t=534

Not as cheap.. but very nice: Cool If you are building a room, it would be pretty easy to build these into the corners.

http://forum.studiotips.com/viewtopic.php?t=535

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gory smelley
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Scott R. foster
audio school graduate


Joined: 18 Jul 2006
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Location: Jacksonville, FL

PostPosted: Fri Jul 21, 2006 10:22 am    Post subject: Re: TapeOpCon 2006 Bass Trap Reply with quote

You're Welcome.. but remember.. post pics, or it didn't happen... this is the internet after all. Wink
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