#1
My head, Some model Randall, is currently being played through a Crate combo amp. However, when I tried using my friend's Marshall cab to substitute, it didn't work. What gives? Could it be that I need a cab with it's own power? Was the resistance off? What?
#2
Probably something to do with the Ohms settings.
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#3
resistance would stop the amp from working entirely? Huh. Well, I'd better figure out how to change it then, if I can.
#4
ohms may not match up- i dont see why that would stop it working entirely but....
What Marshall cab is it? once you find out the amount of ohms the cab has, then you should be able to adjust it accordingly on the back of your Randall with a switch that is usually changeable between 4, 8 and 16 ohms.

If you can't get the ohms to match up, then don't try it, because you can severely damage both pieces of equipment.
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#5
im assuming you played it through an MG cab
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#6
Ohms not matching may make it not work at all if the Speakers are a lower amount of Ohms than the head.

If they're higher, you would blow the speakers instantaneously.

Either way it results in not hearing anything.
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#7
^ Theres the answer lol
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#8
SO I guess my head had higher ohms than the cab, because we plugged in another head after and used that one (leading me to believe that the speakers weren't blown). It was sort of embarrassing though, it was before a little show at my friend's graduation party.
I'm not sure I have a switch, at least none that I've ever seen. Should it say somewhere on the back of the head the Resistance?
#9
Quote by TehNez
Ohms not matching may make it not work at all if the Speakers are a lower amount of Ohms than the head.

If they're higher, you would blow the speakers instantaneously.

Either way it results in not hearing anything.

what?

maybe it's late and I'm just not understanding you, but that makes no sense at all to me. First, it depends if he's got a SS or tube amp with impedance matching output transformer. If it's SS, it shouldn't hurt it at all, even with mismatch ohms, it just may not put out the rated power. SS heads usually have a max or min impedance rating.

With tube heads, if you use a lower impedance speaker than the head is expecting, it can cook the output transformer from too much current. There will be less power mismatching in either direction however. If you use a higher impedance speaker than the amp is expecting, it pushes less current, and can change the sound due the output tranny running cooler.

Blowing the speakers is usually too much wattage or massive clipping, not mismatched ohms. It's the OT's that usually die from mismatched ohms.
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#10
Yeah if it's a solid state, the mis-matched ohms (while certainly not good for either piece of equipment) shouldn't damage the head. If the speaker was rated at 16 ohms, and the SS head output is rated at 8 ohms, neither would be instantaneously damaged (and you'd still get a sound). If the reverse was true, I'm not sure what would happen. There might be some damage caused, but you'd still get sound. Tube amps, however, are a totally different story and I can't comment there, sorry.
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#11
It's solid state, and no matter what I did, it wouldn't make any noise. Actually, it did, but it wasn't audible unless my ear was right next to the amp.
So. Yeah.