Author Topic: Beefing Up An Old Speaker Cabinet  (Read 2672 times)

Offline James Edward

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Beefing Up An Old Speaker Cabinet
« on: May 10, 2021, 07:06:31 PM »
Iím helping a friend refurbish a 40 year old pair of SEAS speakers. I had SG Custom Sound rebuild the crossovers, and consulted with Madisound about replacement drivers which are on the way.
The cabinets themselves seem a little Ďringyí to me. Since the crossovers are finished, and the drivers are specíd for the original cabinet dimensions (itís a 2 cabinet design, a little like a WATT/Puppy), what options are available to deaden the box? I would imagine much internal bracing would alter the volume- is this much of a concern? The woofer cabinet is ~ 59 liters.
Would a Dynamat product be a solution? Or am I overthinking this? Would a few crossbars inside make much of a difference to the box volume to affect much of anything?
Any thoughts or suggestions appreciated. My friend is a carpenter and craftsman, so most ideas could probably be implemented without much trouble.
Thanks as always.
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Offline Jack

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Re: Beefing Up An Old Speaker Cabinet
« Reply #1 on: May 10, 2021, 08:24:17 PM »
Might want to ask Danny at GR Research.
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Offline S Clark

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Re: Beefing Up An Old Speaker Cabinet
« Reply #2 on: May 10, 2021, 08:31:23 PM »
Crossbars would have a negligible effect of the volume and are usually a good idea ( I like dowel rods).  For damping side walls, the No Rez that Danny sells is a good product. It also has little effect on internal volume, since it is mostly a very dense open cell foam.  It does need a clean surface to stick. 
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Offline rollo

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Re: Beefing Up An Old Speaker Cabinet
« Reply #3 on: May 11, 2021, 08:34:36 AM »
Crossbars would have a negligible effect of the volume and are usually a good idea ( I like dowel rods).  For damping side walls, the No Rez that Danny sells is a good product. It also has little effect on internal volume, since it is mostly a very dense open cell foam.  It does need a clean surface to stick.


  Sound advice. Agree 100%.


charles
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Offline James Edward

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Re: Beefing Up An Old Speaker Cabinet
« Reply #4 on: June 12, 2021, 02:08:25 PM »
Just a follow-up… I’ve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. I’ll post some pics when these babies are singing. I should say I’ll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.
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Offline Nick B

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Re: Beefing Up An Old Speaker Cabinet
« Reply #5 on: June 12, 2021, 02:32:03 PM »
Just a follow-upÖ Iíve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. Iíll post some pics when these babies are singing. I should say Iíll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.

Yes, pls keep us posted. As to posting pics, I feel your painÖ Iím able to post online pics, but none from my iPhoto libraryÖ.  not yet at least  :lol:  the old heic, jpg, jpeg problem
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Offline rollo

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Re: Beefing Up An Old Speaker Cabinet
« Reply #6 on: June 16, 2021, 08:14:52 AM »
Just a follow-upÖ Iíve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. Iíll post some pics when these babies are singing. I should say Iíll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.

  Decent choice however No-Rez is King in that department. I would install wood dowels forced into place to stiffen cabinet. Have fun.


charles
contact me  at rollo14@verizon.net or visit us on Facebook
Lamm Industries - Aqua Acoustic, Formula & La Scala DAC- INNUOS  - Rethm - Kuzma - QLN - Audio Hungary Qualiton - Fritz speakers -Gigawatt -Vinnie Rossi,TWL, Swiss Cables, Merason DAC.

Offline James Edward

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Re: Beefing Up An Old Speaker Cabinet
« Reply #7 on: May 02, 2023, 07:20:42 AM »
Just a follow-upÖ Iíve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. Iíll post some pics when these babies are singing. I should say Iíll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.
They are finally together- after two years! Iíll figure out a way to get some pictures on here. They sound good too- props to SG Custom Sound for the crossovers, and Madisound for all the back and forth regarding drivers that would fit both the cabinet and original specifications- these were purchased in 1980!
A little tung oil rub and the cabinets donít look too shabby either.
Thanks to all who gave suggestions.

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Esoteric K-07X
Pro-Ject Debut Carbon Esprit SB
Audience Au24SE
PI Cat6
Spatial Audio M3 Turbo S
Stereo Hsu ULS-15 Mk2
Supra Classic 6.0

Offline Nick B

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Re: Beefing Up An Old Speaker Cabinet
« Reply #8 on: May 02, 2023, 09:56:46 AM »
Just a follow-upÖ Iíve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. Iíll post some pics when these babies are singing. I should say Iíll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.
They are finally together- after two years! Iíll figure out a way to get some pictures on here. They sound good too- props to SG Custom Sound for the crossovers, and Madisound for all the back and forth regarding drivers that would fit both the cabinet and original specifications- these were purchased in 1980!
A little tung oil rub and the cabinets donít look too shabby either.
Thanks to all who gave suggestions.

Great news! Would enjoy seeing the pics. Any idea what format the pics youíll be posting are? jpeg,jpg, heicÖ?
« Last Edit: May 02, 2023, 10:13:00 AM by Nick B »
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Offline S Clark

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Re: Beefing Up An Old Speaker Cabinet
« Reply #9 on: May 02, 2023, 10:03:28 AM »
Pictures!!
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Pre-Dodd
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Offline P.I.

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Re: Beefing Up An Old Speaker Cabinet
« Reply #10 on: May 02, 2023, 07:34:18 PM »
Just a follow-upÖ Iíve settled on this- it will serve to beef up the box a bit and also eliminate the need for the fiberglass insulation, resulting in a neater project.
https://www.parts-express.com/Sonic-Barrier-1-1-4-3-Layer-Damping-Material-w-PSA-18-x-24-260-535
My friend still wants to refinish the cabinets, but the crossovers are rebuilt, and the speaker drivers are in. Iíll post some pics when these babies are singing. I should say Iíll TRY and post some pics!
Rebuilt crossovers done by Scott at SG Custom Sound Douglaston, NY
Drivers from Madisound- Brian was VERY helpful in getting drivers that fit and corresponded to the original T/S parameters.
I guess the proof will be in the pudding when these are finally together.
They are finally together- after two years! Iíll figure out a way to get some pictures on here. They sound good too- props to SG Custom Sound for the crossovers, and Madisound for all the back and forth regarding drivers that would fit both the cabinet and original specifications- these were purchased in 1980!
A little tung oil rub and the cabinets donít look too shabby either.
Thanks to all who gave suggestions.

Great news! Would enjoy seeing the pics. Any idea what format the pics youíll be posting are? jpeg,jpg, heicÖ?

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