Surf_fan63
Joined: Jan 09, 2021
Posts: 36
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Posted on Mar 15 2023 12:44 PM
This question came to my head a while ago and maybe it's somewhat obvious but I don't have enough knowledge to answer it myself so I leave it for you, the most experts to answer it, greetings.
If anyone knows how to do it, I would be very grateful if you tell me how it is.
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DeathTide
Joined: Apr 13, 2018
Posts: 1379
New Orleans
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Posted on Mar 15 2023 04:17 PM
You'd have to either add another 4 ohm cab, change output transformers to one that has a 4 ohm tap, get a Weber Z Matcher, or not worry about it at all because good old fender iron can easily handle a 100% impedance mismatch.
— Daniel Deathtide
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DeathTide
Joined: Apr 13, 2018
Posts: 1379
New Orleans
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Posted on Mar 15 2023 04:19 PM
Oh right, one more idea: put either 4 or 16 ohm speakers into the cab and wire appropriately for an 8 ohm load.
— Daniel Deathtide
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kick_the_reverb
Joined: Feb 26, 2006
Posts: 1339
Escondido, CA
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Posted on Mar 15 2023 04:30 PM
You don't need to modify anything. If my 8 ohm showman amps run 12 hours straight with a 4 Ohm load year after year (SG101 Convention backline), yours should be fine. I put a small fan behind each head for some extra peace of mind.
I wouldn't try it with a 2 ohm load, though.
Ran
— The Scimitars
Last edited: Mar 15, 2023 16:30:52
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Pyronauts
Joined: Feb 27, 2006
Posts: 1170
Northern CA
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Posted on Mar 15 2023 06:54 PM
They sound better when they're running hot!
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edwardsand
Joined: Jun 29, 2018
Posts: 802
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Posted on Mar 15 2023 08:33 PM
kick_the_reverb wrote:
You don't need to modify anything. If my 8 ohm showman amps run 12 hours straight with a 4 Ohm load year after year (SG101 Convention backline), yours should be fine. I put a small fan behind each head for some extra peace of mind.
Ran
That's not very nice to the small fans - they won't be able to see the band very well.*
*Obvious bad joke that couldn't be resisted.
Otherwise, the best answers have been given and the other alternative would be to change the output transformer, but that is an extreme measure. Of course, if it's a recent repro head, the OT could have multiple taps, in which case you could have a switch installed to change between different impedances.
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