Keystone Sub Using 18,15,&12 Inch Speakers - Page 18 - diyAudio
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Old 27th August 2013, 04:56 PM   #171
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Quote:
Originally Posted by sine143 View Post
hey art, you think its safe to say that this cab in real baltic birch is gonna come in around 180 to 200lbs?
With lightweight 3/4" plywood and the BC18SW115 the Keystone came in around 150 pounds.
From what I can tell, BB ranges from around 2.6 to 3 pounds per square foot.
The Keystone with the BC18SW115 should weigh around 175 pounds if the BB is around 3 pounds per square foot, using the the BC18TBW100 instead would add another 7.1 pounds.

Last edited by weltersys; 27th August 2013 at 05:00 PM.
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Old 27th August 2013, 05:11 PM   #172
epa is offline epa  Netherlands
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bb is for 18mm 12.78kg/m2
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Old 27th August 2013, 05:27 PM   #173
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Originally Posted by epa View Post
bb is for 18mm 12.78kg/m2
That would be on the light side for Baltic Birch, equivalent to about 85 pounds for a 4x8.
Using that density, the Keystone should come in under 175 pounds (79.5 kg) even with the BC18TBW100.
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Old 27th August 2013, 07:11 PM   #174
epa is offline epa  Netherlands
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i looked for this information myself a while ago.
but i never measured it.
for b/bb grade
18mm 12.78kg/m2
15mm 10.65kg/m2
12 mm 8.52kg/m2
10 mm 7.1kg/m2
8mm 5.68kg/m2
edit/ found this
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Last edited by epa; 27th August 2013 at 07:18 PM.
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Old 27th August 2013, 09:30 PM   #175
sine143 is offline sine143  United States
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Im teetering on the edge of building a couple... bcsw115 at 508 shipped from parts exprss, found some tbw100s for around 350 shipped, meaning the tbw loaded would run me about 475 after wood/glue/hardware, the sw115, about 630.

Still dont have enough fire power to get them to xmax tho
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Old 3rd September 2013, 11:48 PM   #176
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ok, so I have been using Ubuntu for about 1 1/2 years and love it until today. I have cutlist installed via WINE and it will not show solution of the board layouts for the keystone. e Even when i manually drag the boards it freezes up repeatedly. Can someone post the cutlist please??
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Old 4th September 2013, 01:19 AM   #177
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There is a board layout for a pair of Keystones in the right hand side of the sketch in #63.
Takes three 3/4" 4 x 8 sheets for a pair.
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Old 13th November 2013, 04:41 AM   #178
sine143 is offline sine143  United States
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allllright. so I've finally convinced a friend to go halfs with me on 4 keystones. We had initially planned to drop the extra cash on the Sw115. Arts indicating it might be more prudent to just go with the tbw100. Weight is not a concern.

All I have available is my xti 4002 (doubtfully useful), and his LG 14000 Clone amp (a suppossed 4500 watts at 4 ohms per channel). I'm more than happy to plug that clone up to a 30 amp or even 50 amp service if need be... the real question is if we can make use of the Sw115s power. If there's no audible difference, I have no issue going with the tbw... the fact that we're getting 4 means I'll get a pretty discount on them (I'd need to get 12 sw115s to get a similar discount).
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Old 13th November 2013, 08:21 PM   #179
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Quote:
Originally Posted by sine143 View Post
allllright. so I've finally convinced a friend to go halfs with me on 4 keystones. We had initially planned to drop the extra cash on the Sw115. Arts indicating it might be more prudent to just go with the tbw100. Weight is not a concern.

All I have available is my xti 4002 (doubtfully useful), and his LG 14000 Clone amp (a suppossed 4500 watts at 4 ohms per channel). I'm more than happy to plug that clone up to a 30 amp or even 50 amp service if need be... the real question is if we can make use of the Sw115s power. If there's no audible difference, I have no issue going with the tbw... the fact that we're getting 4 means I'll get a pretty discount on them (I'd need to get 12 sw115s to get a similar discount).
The xti 4002 bridged mono would power one four ohm cabinet nicely.

Whether you would notice the 2 dB difference using a 18SW115-4 driven at 82v compared to a 18TBW100-4 at 64 volts is hard to say.
I don't think I'd notice a difference unless it was an A/B test.

Have fun making sawdust!

Art
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Old 13th November 2013, 08:49 PM   #180
sine143 is offline sine143  United States
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I will. do you mind if I post a 3d model of the cab here? I still need to add bracing... and I had a quick question:

is there a "spacer ring" for mounting the 18" woofers? I notice the cut out is only Sixteen inches
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