Driver below recommended Vas, but all other requirements are perfect

For livingroom sound better than in a theatre.
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Keryn O'Shea
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Joined: Sat Jan 26, 2013 5:50 pm
Location: Brisbane, Australia

Re: Driver below recommended Vas, but all other requirements are perfect

#16 Post by Keryn O'Shea »

I'd do it.. Your Qts, Fs and Xmax are there, and if it fails to impress you, you have a reason to save up for a LAB15 :)

Now.. what are you building for mains?
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L

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Bill Fitzmaurice
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Joined: Tue May 02, 2006 5:59 pm

Re: Driver below recommended Vas, but all other requirements are perfect

#17 Post by Bill Fitzmaurice »

I didn't notice it before but the 100-300L Vas recommendation is for fifteen inch drivers. Twelves have smaller Vas than fifteens, so you should have been comparing against recommended twelves. The Dayton RSS 315-4 Vas is 84L.

jimbo7
Posts: 877
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: Driver below recommended Vas, but all other requirements are perfect

#18 Post by jimbo7 »

Keryn O'Shea wrote: Sat Oct 14, 2023 9:42 pm I'd do it.. Your Qts, Fs and Xmax are there, and if it fails to impress you, you have a reason to save up for a LAB15 :)

Now.. what are you building for mains?
TLAH. I already have SLA's but they look like pro-audio cabinets with stands. Center will be a 6 driver curved array and I'll get to the surrounds last (actually the mains last since I hate all the wiring).
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

jimbo7
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Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: Driver below recommended Vas, but all other requirements are perfect

#19 Post by jimbo7 »

Bill Fitzmaurice wrote: Sun Oct 15, 2023 7:51 am I didn't notice it before but the 100-300L Vas recommendation is for fifteen inch drivers. Twelves have smaller Vas than fifteens, so you should have been comparing against recommended twelves. The Dayton RSS 315-4 Vas is 84L.
I feel dumb. Your plans have a lot the same info on the first few pages so I gloss over most of it to find the pertinent info. like driver specs. I didn't follow the rules and read the plans completely at least 3 times. Literally the next sentence after T/S specs. I'll make sure to give myself a few lashings after each panel is cut.
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

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Seth
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Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: Driver below recommended Vas, but all other requirements are perfect

#20 Post by Seth »

jimbo7 wrote: Sun Oct 15, 2023 11:02 am
Bill Fitzmaurice wrote: Sun Oct 15, 2023 7:51 am I didn't notice it before but the 100-300L Vas recommendation is for fifteen inch drivers. Twelves have smaller Vas than fifteens, so you should have been comparing against recommended twelves. The Dayton RSS 315-4 Vas is 84L.
I feel dumb. Your plans have a lot the same info on the first few pages so I gloss over most of it to find the pertinent info. like driver specs. I didn't follow the rules and read the plans completely at least 3 times. Literally the next sentence after T/S specs. I'll make sure to give myself a few lashings after each panel is cut.
Don't feel dumb Jimbo. The way the plans read, I would have assumed the stated specs were universal to either size driver too. There should be clear T/S spec recommendations for each driver size in the plans.
Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

Keryn O'Shea
Posts: 634
Joined: Sat Jan 26, 2013 5:50 pm
Location: Brisbane, Australia

Re: Driver below recommended Vas, but all other requirements are perfect

#21 Post by Keryn O'Shea »

Bill Fitzmaurice wrote: Sun Oct 15, 2023 7:51 am I didn't notice it before but the 100-300L Vas recommendation is for fifteen inch drivers. Twelves have smaller Vas than fifteens..
Great spotting, good news though
jimbo7 wrote: Sun Oct 15, 2023 11:02 am ..I'll make sure to give myself a few lashings after each panel is cut.
Pics please :)
jimbo7 wrote: Sun Oct 15, 2023 10:50 am TLAH...Center will be a 6 driver curved array and I'll get to the surrounds last..
You won't be dissapointed mate!
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L

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Seth
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Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
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Re: Driver below recommended Vas, but all other requirements are perfect

#22 Post by Seth »

jimbo7 wrote: Sun Oct 15, 2023 11:02 am ...I'll make sure to give myself a few lashings after each panel is cut.
When a problem comes along...
Before the cream sets out too long...
When something's going wrong...
Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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