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Topic: question |
Wayne Harris
From:
Kentucky, USA
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Posted 9 Mar 2016 4:06 pm |
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| i have a fender twin reverb amp and has two 8 ohm speakers can i use one 8 ohm and one 4 ohm in it thanks much |
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DG Whitley
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Posted 9 Mar 2016 4:44 pm
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Wayne, is it wired series or parallel? (probably Fender twin owners know, I don't)
If it is wired in series then the amp is "seeing" 16 ohms and putting a 4 in there would drop it to 12. Would depend on whether the amp is set to handle it.
If it is wired in parallel, then the amp is "seeing" 4 ohms and I don't think I would drop below 8 ohms on the second speaker.
Just my 2 cents, YMMV. |
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Ken Fox
From:
Nashville GA USA
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Posted 9 Mar 2016 7:55 pm
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| An 8 ohm and 4 ohm in parallel would be a 2.66 ohm load. |
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Ken Pippus
From:
Langford, BC, Canada
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Posted 9 Mar 2016 8:21 pm
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| Which should be "close enough," right? |
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DG Whitley
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Posted 10 Mar 2016 6:43 am
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| Thanks for the correction Ken, I haven't been seriously into electronics math since my TV repairman days in the 70's and 80's. I was just guessing off the top of my head, thank you for the reminder. |
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Lane Gray
From:
Topeka, KS
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Posted 10 Mar 2016 7:48 am
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For two loads in parallel, you divide the products by the sums, or Load1*Load2/Load1+Load2
In this case, 4*8=32 and 4+8=12
32/12 is, as Ken said 2.66
Since they say the Fenders can deal with a mismatch between half and double, you'd be OK, as long as the output transformer is in good shape. It'd make me nervous about pushing it, though.
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects |
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George Piburn
From:
The Land of Enchantment New Mexico
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Posted 23 Mar 2016 6:48 pm mis match
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Your 4 ohm speaker will be more driven than the 8 ohm - the fender basically can handle the load even though it is not recommended , but one speaker will be louder than the other , if they are the same model except for the ohms.
The Big answer you want is to have a matched pair of 8 ohm speakers.
To keep consistent , either replace both at the same time or have both re coned at the same time.
I am a Factory Trained certified JBL EV - Warranty Service person. Retired from Repairs.
George Boards |
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Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
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Posted 23 Mar 2016 7:10 pm
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| Click |
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