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Dual jacks on speaker cab [message #29313] Mon, 26 August 2024 09:34 Go to next message
Kustom14 is currently offline  Kustom14
Messages: 9
Registered: May 2024
Location: Batavia, Ohio
Junior Member
I just got a 2x12 speaker cab, and was surprised to see two jacks on one mounting plate on the bottom, instead of just one. (Took an image but can't figure out how to show it here.)

Is this some sort of series/parallel thing, or is it an 8 ohm/16 ohm option?

Haven't opened the back yet to see what's inside -- should be CTS speakers -- because I wanted to see what you guys think of this first.
Re: Dual jacks on speaker cab [message #29314 is a reply to message #29313] Mon, 26 August 2024 11:48 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4786
Registered: June 2004
Location: NY
Senior Member
Is this a vertical or horizontal 2-12" cab?
Kustom never made a horizontal vintage 2-12" cab.
Either someone added that two jack plate or it's one of the 2-12" cabs from  the year 2000/ 2001.

Please note that pictures can not be posted on this site.
Re: Dual jacks on speaker cab [message #29315 is a reply to message #29313] Mon, 26 August 2024 11:49 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4786
Registered: June 2004
Location: NY
Senior Member
Is this a vertical or horizontal 2-12" cab?
Kustom never made a horizontal vintage 2-12" cab.
Either someone added that two jack plate or it's one of the 2-12" cabs from  the year 2000/ 2001.

Please note that pictures can not be posted on this site.
Re: Dual jacks on speaker cab [message #29316 is a reply to message #29313] Mon, 26 August 2024 11:51 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4786
Registered: June 2004
Location: NY
Senior Member
Is this a vertical or horizontal 2-12" cab?
Kustom never made a horizontal vintage 2-12" cab.
Either someone added that two jack plate or it's one of the 2-12" cabs from  the year 2000/ 2001.

Please note that pictures can not be posted on this site.
Re: Dual jacks on speaker cab [message #29317 is a reply to message #29313] Mon, 26 August 2024 11:51 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4786
Registered: June 2004
Location: NY
Senior Member
Is this a vertical or horizontal 2-12" cab?
Kustom never made a horizontal vintage 2-12" cab.
Either someone added that two jack plate or it's one of the 2-12" cabs from  the year 2000/ 2001.

Please note that pictures can not be posted on this site.
Re: Dual jacks on speaker cab [message #29318 is a reply to message #29313] Mon, 26 August 2024 14:39 Go to previous messageGo to next message
Kustom14 is currently offline  Kustom14
Messages: 9
Registered: May 2024
Location: Batavia, Ohio
Junior Member
It's vertical (2-12B, S/N 57695, and it's rectangular -- no slant to the cab).

CTS 12 ohm speakers.

Clearly the back has been routed for this plate, which has two holes for jacks and another (empty) hole just above and between those two.

It looks like the wiring has the second jack "jumpered" to the first one. Just not sure what the motivation was to do this, or what its utility might be.
Re: Dual jacks on speaker cab [message #29319 is a reply to message #29318] Tue, 27 August 2024 14:30 Go to previous message
rodak
Messages: 523
Registered: October 2001
Location: Georgia
Senior Member
It was probably to allow connecting two speaker cabs in parallel.  The amp probably has only one speaker jack, so you'd need some way to connect the two in parallel.  This is ok, as long as the total connected speaker impedance isn't lower than what the amp is rated for (assuming solid-state amps - tube amps are a different matter).  K200 amps can drive a speaker load as low as 4ohms.  If your 2x12 cab is 8ohms (two 16ohm speakers in parallel), then you could connect a second 8ohm cab using that extra jack.



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