Multiple driver wiring

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jimbo7
Posts: 875
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Multiple driver wiring

#1 Post by jimbo7 »

I'm bringing my SLA's and T24 to a backyard BBQ Saturday and I have 2 dead tweets in one cab. Yeah they're the Goldwoods. How can I rewire it for 6- 4ohm tweets to keep it at 4 ohms total. I could do the same for the other cab so they're sound even. My brain is hurty and can't figure the series/parallel math to save me.

edit: they're the 6 mid 9 tweet version
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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Tom Smit
Posts: 7596
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Multiple driver wiring

#2 Post by Tom Smit »

Three in series to make a set, both sets in parallel.

Will the tweets match the woofs in output this way?
TomS

jimbo7
Posts: 875
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: Multiple driver wiring

#3 Post by jimbo7 »

Tom Smit wrote:Three in series to make a set, both sets in parallel.

Will the tweets match the woofs in output this way?
That's what I was thinking but I can't math good.

The mids are 8ohm wired as 2 series wired banks of 3 mids in parallel
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

CoronaOperator
Posts: 1648
Joined: Wed Mar 25, 2009 7:07 pm
Location: Medicine Hat, Alberta, Canada

Re: Multiple driver wiring

#4 Post by CoronaOperator »

Tom Smit wrote:Three in series to make a set, both sets in parallel.

Will the tweets match the woofs in output this way?
That would make the total 6 ohms. That will mess up the crossover a little bit, might not be too bad. using 4 tweets would keep it at 4 ohms but sensitivity would be down almost 6 db. Eq'able but make sure you don't push them too hard.
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience

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Tom Smit
Posts: 7596
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Multiple driver wiring

#5 Post by Tom Smit »

CO, you are correct.
TomS

jimbo7
Posts: 875
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Re: Multiple driver wiring

#6 Post by jimbo7 »

So I cracked open the bad cab and guess what? The 2 bad tweets' magnets fell off (again). I had to glue them back on soon after I built them. Cleaned up some solder joints and it was back in business. Cracked open the other cab for fun and guess what? One magnet fell off a tweet! The hot glue gave way on my crossover board and knocked off a coil and pulled a solder joint off :wall: :cussing: . Good thing I checked that cab cus it was a mess. Fixed all that nonsense and they sound great again! :fruit: Guess these HT version wasn't designed to move around much. :slap:

In the close to near future I'll be making a pair of OT12's, so this'll be my non-PA SLAs last hurrah outside where they'll then make home in my distant to hopefully this decade HT setup.
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
Tom Smit
Posts: 7596
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Multiple driver wiring

#7 Post by Tom Smit »

Perhaps some epoxy would work better than hot glue....use hot glue to temporarily hold them in place, and then add epoxy to keep them there.
TomS

Grant Bunter
Posts: 6912
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Multiple driver wiring

#8 Post by Grant Bunter »

Tom Smit wrote:Perhaps some epoxy would work better than hot glue....use hot glue to temporarily hold them in place, and then add epoxy to keep them there.
Good idea Tom!
Jimbo, have you zip/cable tied the components as well?
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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