FX Return vs Power Amp In | Moe’s Tavern 2.0: A Guitar Forum

woodyblues
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FX Return vs Power Amp In Mar 28, 2023 18:02:10 GMT -5

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Post by woodyblues on Mar 28, 2023 18:02:10 GMT -5

Hello amp Oracles. I have a question about using an amp as a slave to another amp. I have seen some Fender Twin amps which on the back panel have both an FX loop AND a Power Amp In. I was under the impression that for an amp which only has an FX loop that using the FX Return to receive the line out from another amplifier would act like a power amp in bypassing the preamp stage of the slave amp. Does this sound correct?

pdf64
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FX Return vs Power Amp In Mar 30, 2023 3:56:28 GMT -5 via mobile

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Post by pdf64 on Mar 30, 2023 3:56:28 GMT -5

The Pro Tube series from the early 2000s has that arrangement.
The fx loop is before the amp’s reverb, whereas the pre out / power amp in loop is after the reverb.
Also the fx loop has a footswitchable bypass function, whereas the pre-power loop doesn’t.
el34world.com/charts/Schematics/files/Fender/Fender_pro_tube2.pdf

The above looks to hold true for the ‘94 Twin Amp model too el34world.com/charts/Schematics/files/Fender/Fender_twin_94.pdf

Last Edit: Mar 30, 2023 4:53:43 GMT -5 by pdf64

woodyblues
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FX Return vs Power Amp In Mar 31, 2023 4:03:36 GMT -5 pdf64 likes this

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Post by woodyblues on Mar 31, 2023 4:03:36 GMT -5

Thanks for your reply pdf64. I have a 15 watt amp which I love the sound of but in this small club with a drummer it is getting lost at times. I've never used a "slave" amp but this concept is perfect for what I want to do.