| wiring for a 4-12b cabinet [message #6157] |
Sat, 17 September 2005 00:03  |
ajenks
Messages: 2
Registered: September 2005
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Junior Member |
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I recently aquired a Kustom IV Lead with a 412B cabinet. I'm pretty sure it was manufactured in early '76. My problem is the person that I got it from decided to gut the cabinet. All that is left inside is the speakers. I think I have 4 8ohm speakers. What do I need to rebuild this cabinet? Also I'm not sure of the output impedence of the Amp. Any help would be appreciated.
[Updated on: Sun, 18 September 2005 01:52] Report message to a moderator |
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| Re: wiring for a 4-12b cabinet [message #6771 is a reply to message #6157] |
Mon, 13 March 2006 07:55  |
stevem
Messages: 4773
Registered: June 2004
Location: NY
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Senior Member |
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If you log on to parts express, they carry all sorts of flat and recessed , single and dual jack plates.I would opt for a STEEL type jack plate if they offer one that will cover the area needed. I do not think you will ever need to play thru more than 4-12s but the original jack plate had the jacks in parallel. With 4 8 ohm speakers their is only two different impedances you can wire the cab for, 8 or 16 ohms, so you would wire for 8 ohms. you can get this two ways(1) wire 2 speakers in serise, than parallel those two pairs to the jack(S). Or wire each pair in parallel and then feed them in serise off the jack.Each way will sound slightly different,one way will be brighter then the other, I would try them both and pick what you like. If you wire in parallel, and you get a jack plate big enough to mount a mini toggle switch on, you can cut out 2 speakers and inturn cut the sound pressure in half if you want, this will be 4 ohms to the amp. 4-12s can be quite loud by the time you get the tone you want, halving the speakers may help.try it when you are wiring things up.
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