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Amp Help!?


liludallas

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Um I'm an idiot and I've got a quick question. I just bought a Fender Stage 100 head and a fender 4X12 cab used. And this is the 1st time I've had an amp/cab split. I dunno if I connecrt the speakers to the back of the amp in the 8 load min input or the 4 load min input. Any ideas?

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You can stick a 1/4" plug in the cab's jack. Measure resistance across the + & -. Bingo. Now you know your load requirement. I will do this with any used cab. Even if I have specs on it. Never know when some well meaning DIY'er has been inside & changed speakers, rewired, stuck a Kat inside or whetever. (I'm gonna catch {censored} for that one!) And sometimes changes aren't written down. I'd hate to fry an amp because of someone else's negligence. BTW below 4 ohms = 4 ohm load. Between 4 & 8 ohms= 8 ohm load. Above 8 ohms = 16 ohm load. Never assume anything! That would be like flying an airplane without a good preflight. NOT ME! And how do I get the ohms symbol on my computer keyboard?

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You can stick a 1/4" plug in the cab's jack. Measure resistance across the + & -. Bingo. Now you know your load requirement. I will do this with any used cab. Even if I have specs on it. Never know when some well meaning DIY'er has been inside & changed speakers, rewired, stuck a Kat inside or whetever. (I'm gonna catch {censored} for that one!) And sometimes changes aren't written down. I'd hate to fry an amp because of someone else's negligence. BTW below 4 ohms = 4 ohm load. Between 4 & 8 ohms= 8 ohm load. Above 8 ohms = 16 ohm load. Never assume anything! That would be like flying an airplane without a good preflight. NOT ME! And how do I get the ohms symbol on my computer keyboard?

 

 

 

This is true, however in checking the cab's impedance with an ohmeter you are only checking the resistance portion of the impedance and not the inductive/capacitive. You will get close but know that your reading will be a little less. i.e. 4 ohms will read approx. 3.2, 8 ohms, 5-6 ohms, 16 ohms approx 14-15 ohms.

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Exactly why I explained it the way I did. When your hooking things up the other things aren't necessary. But the knowledge is good to have. Also, you can use your speaker cable for the same test. Tip to sleeve. I have a pedal crank I use for this. This aint the amp forum, so no comments about putting my crank in the jackhole.:lol:

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Exactly why I explained it the way I did. When your hooking things up the other things aren't necessary. But the knowledge is good to have. Also, you can use your speaker cable for the same test. Tip to sleeve. I have a pedal crank I use for this. This aint the amp forum, so no comments about putting my crank in the jackhole.
:lol:

 

 

Aaaawwww C'mon Teh Maplifiers Furom aint that bad is it????:cop: Its good comic relief if nothing else

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