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FX loop volume control
FX loop volume control
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Old 6th February 2013, 08:42 PM   #1
johnguitar is offline johnguitar
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Join Date: Jan 2012
Default FX loop volume control


I have a Guitar Tube amplifier with an FX send-return loop. I would like
to create a passive (or active) volume control (attenuator) to insert it in that FX loop to control the volume of the amp (like master volume).
Should it be be line-level? (in general FX loops work at line level or is it irrelevant and is different from amp to amp?)
A 10K potentiometer should be fine or will I have problems with the impedances?

Any response will be appreciated.
Thanks in advance
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Old 7th February 2013, 12:41 AM   #2
jjman is offline jjman  United States
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Depends on the output impedance of the "send" but a simple 100k may work.
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Old 7th February 2013, 01:18 AM   #3
kevinkr is offline kevinkr  United States
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FX loop volume control
Moving thread to Instruments & Amplifiers which is the correct place for this discussion. Please look at forum sub-headers before starting a new thread to determine whether or not you are posting to the correct forum.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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Old 7th February 2013, 10:13 AM   #4
Tesla88 is offline Tesla88  Italy
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Try different pots value if you go passive , try a 10K and a 100K , then chose the one operating more linear on control...
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Old 7th February 2013, 07:00 PM   #5
Enzo is offline Enzo  United States
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Yes, a simple pot wired as a "volume control" can be stuck in the FX loop as a master sort of control. I have a 250k in a small metal box with in and out jacks, and a pot thusly wired as a handy level adjuster for around the shop. It works fine for this.

Send wired to top leg of pot, ground/gommon wired to bottom leg of pot, and wiper of pot wired to return.
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