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Post subject: 1965 Super Reverb Extension Cabinet
Posted: Thu Dec 22, 2011 8:14 pm
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Hey, I was looking at the back of my 1965 Fender Super Reverb, when I first got it, and I saw an output for an extension cabinet. I've done quite a bit of looking online for a paired extension cabinet for this amp but Fender doesn't seem to make one. Does anyone know if Fender has actually built a paired ext. cab for this amp and if so where do I purchase such an animal?

Thank you for your time and consideration,

Jake Newkirk


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Post subject: Re: 1965 Super Reverb Extension Cabinet
Posted: Fri Dec 23, 2011 12:53 pm
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I am unaware of any extension cabinet ever made for a Super Reverb. The SR already has 4 - 10 inch speakers so how much more air do you need to move?

Also the SR is already set up at 2ohms with the 4x10's so you will have some big difficulties with using an extension cabinet and getting the ohms straight!

Oh and welcome to the forum...and one unwritten rule, got to post pics of your instruments/amps.

FWIW

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Post subject: Re: 1965 Super Reverb Extension Cabinet
Posted: Fri Dec 23, 2011 9:16 pm
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Fender did make extension cabs,but they are rare and not mated to any amp.
The cabs for amp heads or the "piggy back amps" as they are called are pretty well known.
If you do want to use an extension cab,and really I can't imagine why with a Super Reverb :wink: ,do some research on speaker impedence and the different wiring configurations....it can get confusing.


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Post subject: Re: 1965 Super Reverb Extension Cabinet
Posted: Mon Dec 26, 2011 11:39 am
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There should be a picture of my gear associated with my profile picture. So, I think I have got it figured out but please correct me if I'm wrong. In my owner's manual for the Super Reverb it says that I would need to use two external speaker cabs each rated at 4 ohms in order to use external speakers and if my math is correct that would make for a total impedance of 8 ohms. So, my thinking is that I could use a super-sonic 2x12 external speaker cab that is rated at 8 ohms and it should work correctly right? For those of you wondering, I would like to have an amp configuration sort of like the Vibro-King setup that is mated with a 2x12 speaker cab. The idea behind it is to let the 3 ten-inch speakers, or in my case 4-ten inch speakers, handle the mid-high frequencies and the 2-twelve inch speakers handle the lower end frequencies and it gives a punchier more responsive bottom end. It's too bad that you can't put some sort of a cross-over in there to separate the bass frequencies and send them specifically to the twelve inch speakers or can you? Please keep in mind that this is only based on reviews that I have read by people who have actually tried this configuration and I have not tried it myself, yet.


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Post subject: Re: 1965 Super Reverb Extension Cabinet
Posted: Tue Dec 27, 2011 6:55 am
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Check this site out,good info on different speaker configurations,etc.
http://fenderguru.com/amps/super-reverb


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Post subject: Re: 1965 Super Reverb Extension Cabinet
Posted: Tue Dec 27, 2011 1:14 pm
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newk0001 wrote:
...In my owner's manual for the Super Reverb it says that I would need to use two external speaker cabs each rated at 4 ohms in order to use external speakers and if my math is correct that would make for a total impedance of 8 ohms....


Well, that would give 2 ohms, not 8.

If you want to use two external speaker cabs, and match the impedance to the amp, unplug the internal speakers from the jack and plug each external 4 ohm cab into both jacks, and this will give 2 ohms total speaker impedance. Typically, connecting speaker cabinets together puts them in parallel with each other, and using two 4 ohm cabs will yield 2 ohms, which will match the amp. You can still use two 8 ohm cabs for a total of 4 ohms with no problems, the amp just won't produce full power. I wouldn't go any higher than 8 ohms total impedance with any combination, but anything lower is fine.

If you use external cabs with the internal speakers connected, you can not get an impedance match no matter what combination of impedance is used, without rewiring the internal speakers. Again, a mismatch only means less power from the amp, but can still sound good.

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