Driver below recommended Vas, but all other requirements are perfect

For livingroom sound better than in a theatre.
Message
Author
Keryn O'Shea
Posts: 559
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

User avatar
Bill Fitzmaurice
Site Admin
Posts: 28916
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: 874
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
Posts: 874
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

User avatar
Seth
Posts: 3007
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
Contact:

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.
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

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: 559
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

User avatar
Seth
Posts: 3007
Joined: Thu Sep 10, 2009 8:06 pm
Location: Sacramento, California, USA
Contact:

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...
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

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

Post Reply