Topmusicanswers
What is parallel effects loop?
In a Parallel Loop the signal of your amp is NOT routed through the effects unit but it stays inside the amp. The effects signal on the parallel input (Return) is mixed by a (Level) potmeter with the signal of your amp inside the amp. Therefore, the sound of your amp can not be affected by the effects unit.
How do you tell if your effects loop is series or parallel?
The giveaway is the presence of a Mix control. A Parallel FX loop will have a Mix control, but a Series loop will not. Also, do not confuse Send Level (found on certain Mesa amps) or Return Level controls with being Mix — some Series effects loops will have those, but they will not be labeled Mix.
