#1342858 - 09/21/01 03:09 PM
4X12 mod question
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timrocker
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Hi All;
I have a Jackson 4X12 cabinet with 4 Celestion 16-ohm speakers. It's wired for mono now, and I'd like to add a switch and be able to use it in stereo or mono. Any one have experience in that department? Thanks.
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#1342859 - 09/21/01 04:52 PM
Re: 4X12 mod question
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velvetoceansound_dup1
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e-mail me and I can send you info on how to do this. There is too much involved to describe it with text only. Don't worry though, it is possible with a little re-wiring and two more input jacks.
James
nislyj@timken.com
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#1342860 - 09/21/01 05:03 PM
Re: 4X12 mod question
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Chip McDonald
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Originally posted by timrocker:
Hi All;
I have a Jackson 4X12 cabinet with 4 Celestion 16-ohm speakers. It's wired for mono now, and I'd like to add a switch and be able to use it in stereo or mono. Any one have experience in that department? Thanks.
Not worth the trouble IMO. The only people that will hear the stereo effect will be those standing point blank in front of the cabinet, and if they're doing that the volume is probably killing them.
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#1342861 - 09/22/01 02:35 AM
Re: 4X12 mod question
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lrbreez
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Actually it is worth doing this. There is a dramatic effect even when you are not infront of the speakers and are to the side.
Buddy
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#1342862 - 09/22/01 03:05 AM
Re: 4X12 mod question
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Matt.Hepworth
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I'm with chip on this one. Stereo in a single cab is nearly useless. The people on one side will hear that side much better and vice versa. The people directly in front will hear a little bit of stereo imaging, but not much. Leave stereo stuff for the studio - it really has no place in live sound. Just my $0.00000002 million.
Matt
No clever saying.
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#1342863 - 09/22/01 05:22 PM
Re: 4X12 mod question
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timrocker
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Thank you all for your replies and input. I realize that stereo in a single 4X12 cabinet is regarded as an unhearable condition for most of the room. That said, I have a need to try it, because my Lexicon Signature 284 is a stereo power amp. I'll actually be printing the output from the discrete XLR's or 1/4 inch direct outs on it. So, the need to use my 4X12 is primarily so that I can monitor effectively, and so the power of the amp will have somewhere to go. Make sense? If I were to try to achieve this effect live, it would probably take another amp and a cabinet on either side of the drum riser. Someday... Thanks again.
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#1342864 - 09/24/01 07:10 PM
Re: 4X12 mod question
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velvetoceansound_dup1
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Registered: 09/21/01
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Another great aplication for this is if you want to run two different amp heads on one cabinet. Say, a fender head on the right for clean, and a cranked marshall on the left for overdrive, then switch between the two amp's inputs. This requires two mics in front of the cab live, but I have seen it done with much success.
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#1342865 - 09/27/01 12:14 AM
Re: 4X12 mod question
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timrocker
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Thanks for the idea, velvetoceansound! I think I have also seen that done very successfully at a show or two.
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#1342866 - 09/27/01 11:29 AM
Re: 4X12 mod question
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DC
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Tim, your quickest fix is to just wire the two left speakers in parallel (both hots to the tip part of the jack, both colds to the sleeve/round part) to the existing jack. Drill a hole and put in another 1/4" jack and wire the two right speakers to it. Problem sussed.
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#1342867 - 09/27/01 06:58 PM
Re: 4X12 mod question
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velvetoceansound_dup1
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DC, the only problem with the above sugestion is that you will be stuck with two 8 ohm loads without the option of going back to mono 16 ohm. What would you do if you wanted to use that cab with a mono amp that was only stable down to 8 ohms? Can't be done. I sent tim a circuit alowing instant switches between 8 ohm stereo and 16 ohm mono. It's probebly similar to what Marshall and Mesa use. I can send it to you if you are interested.
James
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#1342868 - 09/28/01 01:54 PM
Re: 4X12 mod question
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DC
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I see your point James. I wouldn't mind checking that wiring diagram so thanks...
davecharles@musician.net
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#1342869 - 09/29/01 02:34 AM
Re: 4X12 mod question
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Kingcrimson_dup1
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Registered: 07/22/01
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Not to highjack your thread timrocker, but is there a way to wire or mod a 16 Ohm mono cab to be 8 Ohm mono cab?
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#1342870 - 10/02/01 12:58 PM
Re: 4X12 mod question
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velvetoceansound_dup1
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Sorry,King, mathmatically impossible,you will need o ohm speakers. With 16 ohm speakers, your options are 64 ohms, (all four wired in series) 16 ohms, (two parallel pairs wired in series) or 4 ohms (all four speakers wired in parallel) any other combination would yield uneven power distrobution to the speakers.
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