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Post by Eddie on Feb 15, 2012 12:06:56 GMT -7
I have a SA Brakelite with the parallel out.
I have a MAZ Jr. head with 4 and 8 ohm taps.
I have two speaker cabinets - one is 4 ohms, the other 8.
Can I hook both cabs up to the Brakelite for a total ohm load somewhere between 8 and 4 and then use one of the taps on the MAZ Jr. to feed the Brakelite?
I certainly don't NEED to do this, I'm just wondering if it's safe and which tap on the amp to use.
Recap: MAZ Jr 4 _or_ 8 ohm out into the Brakelite. Brakelite dual parallel outs into each of two cabs, one is 4 ohm, one is 8.
Thanks! Eddie
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Post by benttop (Steve) on Feb 15, 2012 13:10:17 GMT -7
Well, sort of. You wouldn't want to hook them in parallel, because the total impedance would drop unacceptably lower than 4 ohms - without running the numbers I think I recall it being about 2.7 ohms or maybe 3.2 ohms. Anyway, you would have to put the two cabs in series, for a total impedance of 12 ohms, then use the 8 ohm tap on the amp. Trouble is, assuming the cabs have the same sensitivity, one of the cabs is going to get twice the power that the other gets, making it louder. That might work for you, or it might not. If the cab getting more power is also lower sensitivity, it might work out perfectly. Only your ears will be the final judge. You would need a special series cable to do this - Todd knows all about it and can have one made for you. You don't normally find them at GC or your local mom and pop shop. Good luck. Oh yeah, hate? Not even. Any question is fair game here, even repeats. Even repeats of repeats...
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Post by Eddie on Feb 15, 2012 15:34:32 GMT -7
Steve,
Thank you! That's exactly the info I was looking for. I certainly don't have a need to do this, but I was curious about how the numbers would add up or be divided.
Btw, I was running the MAZ throught he BL on 3 clicks today into the 1x12 cab. I had it cranked up to that sweet spot with both volumes about 1 o'clock. Good grief, I love the MAZ Jr.
Thanks again Steve. You the MAN! Eddie
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Post by doctorice on Feb 15, 2012 16:24:55 GMT -7
No argument from me, just the fyi that it will be a 2.67 ohm load in parallel, as Steve recalled.
For parallel loads, add up the inverses (reciprocals) of the loads, then take the inverse of the final sum. So here we get 1/4 + 1/8 = 3/8 and 8/3 = 2.67.
If you want to add to your gadget stash, Weber sells an impedance matcher that would allow you to connect a 2.67 ohm load to a standard 4, 8 or 16 ohm speaker out. I've been meaning to get one, but the current need is not pressing. So I bought a couple cheap pedals instead ;D
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Post by Eddie on Feb 15, 2012 17:19:59 GMT -7
No argument from me, just the fyi that it will be a 2.67 ohm load in parallel, as Steve recalled. For parallel loads, add up the inverses (reciprocals) of the loads, then take the inverse of the final sum. So here we get 1/4 + 1/8 = 3/8 and 8/3 = 2.67. If you want to add to your gadget stash, Weber sells an impedance matcher that would allow you to connect a 2.67 ohm load to a standard 4, 8 or 16 ohm speaker out. I've been meaning to get one, but the current need is not pressing. So I bought a couple cheap pedals instead ;D Cool - thanks Mike. The Weber Co. makes a LOT of cool things, don't they? Off topic, but I've always been curious about their speakers. Anyway, thanks for the info! Eddie
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Post by pcns on Feb 16, 2012 10:10:56 GMT -7
Steve, I certainly don't have a need to do this, rats, I thought I was smelling a Series Y cable sale coming! You sure you don't NEEEEED to do this eddie? ;D
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Post by Pete aka shouldb on Feb 17, 2012 8:23:54 GMT -7
No argument from me, just the fyi that it will be a 2.67 ohm load in parallel, as Steve recalled. For parallel loads, add up the inverses (reciprocals) of the loads, then take the inverse of the final sum. So here we get 1/4 + 1/8 = 3/8 and 8/3 = 2.67. If you want to add to your gadget stash, Weber sells an impedance matcher that would allow you to connect a 2.67 ohm load to a standard 4, 8 or 16 ohm speaker out. I've been meaning to get one, but the current need is not pressing. So I bought a couple cheap pedals instead ;D Cool - thanks Mike. The Weber Co. makes a LOT of cool things, don't they? Off topic, but I've always been curious about their speakers. Anyway, thanks for the info! Eddie Using their Blue Pup 10"s - 1x AlNiCo and 1x Ceramic) and LOVING them!! (Ghia and Z28)
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