Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

I think you should save up and buy yourself a cab and not mess with the wiring. I don't doubt you are good at soldering and a good tinkerer but with limited understanding of circuits, speaker load, and impedance, how will you know you connected it right before you fire it up? Remember if something is incorrectly hooked up it could blow the 2/90/2 output transformer(s) or the speakers in the combo. And then you'd be in worse shape than if you waited for a cab.

If this is simply not an option, I suggest a semi-permanent modification to the combo amp. I would recommend removing the wires to the speakers in the combo, conecting the speakers in series, and drilling a new jack in the back of the combo to connect to the speakers. Doing so gives you 100W handling at 16ohms (these are 8 ohm speakers right?). You will not be able to run the combo amp as an amp without removing the modification however and putting it back to stock form. But if you have a 2/90/2 I can't think of a good reason why you would ever touch the behringer again.

This is about the simplest I could suggest without worrying you'll fry yourself or the amp.

Another idea just popped in my head which may not require as much work ... Get a male to double-female "Y" cable. The male side goes into the 2/90/2 the female sides are paralleled and you can simply unplug both speaker jacks from the combo and into the Y cable, set the amp for 4ohms (again these are 8 ohm speakers right?) and youre good. Problem is I do not know of a male to double female Y speaker cable. You may have to build one using wire and plugs from a cable store online. Maybe lavacable? This would probably be the least intrusive and safest method if you can acquire the necessary parts. BUT please use a continuity test on a multimeter to be SURE beyond a shadow of a double that your cable is wired properly. If it's not or it fails as an open circuit (something disconnects) say goodbye to your 2/90/2 output transformer and hello to a 300 dollar minimum cost to repair.

When you weigh the liabilites out I STILL think a cheaper cabinet or used cabinet is the way to go.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

Thank you all so much for your insights and advices. I better be safe than sorry. I will try to find a used cab. And for the short them I will try to hard wire the speakers in series only just to be on the safe side.
Do you know where I can purchase speaker electronics and parts?
 
Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

It only takes a short while to blow something. I wouldn't recommend rewiring that cab at all. Wait, buy a cab.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

It only takes a short while to blow something. I wouldn't recommend rewiring that cab at all. Wait, buy a cab.

Fryette recommended me to wire the cab in parallel creating a 100W/4ohm cab and use it only with Channel A. In this setup they said even if one speakers fails the other one will protect the amp from damages.

Do you agree?
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

That's pretty much what I've been telling you to do the whole time.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

That's pretty much what I've been telling you to do the whole time.

Sorry for the hard time I gave you mate, This stuff is very new to me. I was under the impression that dual single wiring of a cab and parallel are the same thing. Now I know there are every different.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

Fryette recommended me to wire the cab in parallel creating a 100W/4ohm cab and use it only with Channel A. In this setup they said even if one speakers fails the other one will protect the amp from damages.

Do you agree?

It'll protect from a blown output transformer but at that point the amp is still hinging on that 50 watt max.

Really, the best thing to do here is just buy a decent cab.

Plugging a Fryette power amp into the speakers of a Bugera combo amp is sorta like shoehorning the engine & trans from a Ferrari into a Honda Civic... well, actually... I think a Civic is a little too nice to be compared to Burgera.

Maybe a kia rollerskate car...

Not a week goes by where there aren't at least 3 cabs listed on my local craigslist... usually a marshall 4x12 runs $300-350. Why mess around with anything else? If you have to ask where to buy speaker cable, then you probably shouldn't tackle rewiring a speaker cabinet.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

It'll protect from a blown output transformer but at that point the amp is still hinging on that 50 watt max.

Really, the best thing to do here is just buy a decent cab.

Plugging a Fryette power amp into the speakers of a Bugera combo amp is sorta like shoehorning the engine & trans from a Ferrari into a Honda Civic... well, actually... I think a Civic is a little too nice to be compared to Burgera.

Maybe a kia rollerskate car...

Not a week goes by where there aren't at least 3 cabs listed on my local craigslist... usually a marshall 4x12 runs $300-350. Why mess around with anything else? If you have to ask where to buy speaker cable, then you probably shouldn't tackle rewiring a speaker cabinet.

Well said. New cab it is.

But just for the record, I asking where to buy jack plates and switching jacks. I asked what kind of cable should I buy as there were many choices out there.

Thank you all again for you help and participation.
 
Re: Modding a Combo 2X12 Cab for Stereo/Mono (Speaker Rewiring)?

Plates, jacks & such can be gotten from Magic Parts or Antique Electronics Supply... I get most of my speaker cable from the hardware store a reel at a time. I put together a 50' 14-gauge a few days ago for under $20... that'd be a $70 cable in a music shop.

I don't think I've ever bought a new cab either... they've always been used. I'm just gonna beat it up anyway... and if its a well made cab it'll last through decades of abuse, blown speakers aside. Aside from speakers and maybe replacing a handle now and then its hard to "kill" a good plywood cabinet unless you have a forklift or some other heavy machinery.
 
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