FOOTSWITCH JACK: This is where you plug in the footswitch.
SEND JACK: This is where you plug the INPUT of your Effect(s). Use a high quality shielded guitar
cable.
RETURN JACK: This is where you plug the OUT of your Effect(s). Use a high quality shielded
guitar cable.
BALANCED OUT: XLR output used to send your JEL-20 tone straight to the mixing board. For
silent recording ability, have no speaker cable plugged in to the USE FIRST speaker jack.
SPEAKER OUT JACKS (2): Plug speaker cabinets here. Set Impedance selector to appropriate
position.
IMPEDANCE SELECTOR: Select between 16 or 8 Ohm to match your speaker set-up.
PRESENCE CONTROL: Adjusts the upper mids and highs in the power amp section. This is global
on all channels. Start at about 4-5 and adjust to taste. **Note: THIS POT WILL BE SCRATCHY—
THIS IS NORMAL
HT FUSE: Only replace with Type indicated on rear panel. If this fuse blows, it’s most likely a
bad power tube.
MAINS INPUT: Plug the supplied IEC power cord here.
MAIN FUSE: This fuse is in the compartment found below the AC receptacle. Replace only with
type indicated on rear panel. This is also most likely the result of a bad tube. Constant blowing
of this fuse (even when using new tubes) is an indication that something could be seriously
wrong with your amp. STOP and call us so we may help you diagnose.
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