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-   -   Volt 3143 FB conundrum (http://www.diyaudio.com/forums/multi-way/231110-volt-3143-fb-conundrum.html)

mclsound 1st March 2013 09:39 AM

Volt 3143 FB conundrum
 
Hi Guys
I am working on a box for 3-12" Volt 3143's and a ATC mid and SS 9700.I seem to not be in agreement with my designer on the box vent(front firing).
The box is 13w x 58h x 23.75d(inside dimensions).My designer says a vent of
4"h x 13w x 8d for a F3 of 34.9hz,Fb of 31hz.
The owner of the speakers was hoping for a little deeper F3,Fb.

Volt 3143

fs-34
Qa 5.7
Qe .37
Qt .35
Vas 76l
xmax 5.2mm

anyone have any experience with these?

mclsound 1st March 2013 10:08 PM

no one?

Charles Darwin 2nd March 2013 10:15 AM

Build copies of these:

XB2 | PMC Loudspeakers

bjorno 6th March 2013 01:24 AM

1 Attachment(s)
Quote:

Originally Posted by mclsound (Post 3390808)
Hi Guys
I am working on a box for 3-12" Volt 3143's and a ATC mid and SS 9700.I seem to not be in agreement with my designer on the box vent(front firing).
The box is 13w x 58h x 23.75d(inside dimensions).My designer says a vent of
4"h x 13w x 8d for a F3 of 34.9hz,Fb of 31hz.
The owner of the speakers was hoping for a little deeper F3,Fb.

Volt 3143

fs-34
Qa 5.7
Qe .37
Qt .35
Vas 76l
xmax 5.2mm

anyone have any experience with these?

A late response:Yes but not when using 3 in parallel that for me is a 'conundrum'= Why? is it necessary to present a 2 Ohm load for the amps.

b:)

mclsound 6th March 2013 09:48 AM

he has a Krell KSA 250(good to 1ohm) and a 2.7ohm load is fine for it.
Thanks for the proof B...We cut wood and the new dimensions are now
13w x 20w x 66h which is close to the same volume.
So you want to see the drivers sittin up from the vent?correct?

Charles Darwin 6th March 2013 10:49 AM

You could use the 16Ohm version of the Volt and end up with a 5.33 Ohm load.

mclsound 6th March 2013 10:51 AM

I already have them..

Charles Darwin 6th March 2013 10:59 AM

I thought that there was a 80% chance that you did but thought I mention it just in case.;-)

mclsound 6th March 2013 11:06 AM

I have these for my pals speakers
and 4-2500/10" midbass for my new project and 6/ 8" for center and surrounds.
I was thinking on using the 8"(MB,M,T,MB)but not sure they will withstand the sometimes odd lower fs punishment of 40-50hz.But if the 10's donnot image well,then I will try the 8

Charles Darwin 6th March 2013 11:27 AM

That's a lot of Volts!


At the moment I'm just happy that the T/Ls I built for my 3143s almost ten years ago using mostly semi-educated guesstimates and a lot of inspiration from PMCs XB2 are practically identical to Bjorno's 3rd version.
Phew…


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