Johnson Acoustic 50R, Nstruction Manual

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PANEL FUNCTIONS
INTRODUCTION
Thank you for choosing this Johnson amplifier. Please read this manual
carefully and completely before operating your new amplifier.
1
INPUT JACK
Connect the cable from your instrument’s output jack to this
jack. Always use an undamaged, shielded instrument cable.
2
LEVEL LED INDICATOR
This LED lights when the instrument’s signal into the preamp
approaches its clipping point (when it is starting to distort).
Adjust the Gain control so that it only flashes occasionally.
3
GAIN CONTROL
This serves as an input level control. For the best sound pos-
sible, the level LED indicator (2) should flash occasionally as
you play.
Note: You may not hear any sound unless the other knobs
are turned up, please see (10) Level Control for controlling
the volume.
4
LO-TRIM CONTROL
Used to adjust the bass response from your instrument.
Note: Excessive bass boost can cause an unnatural “howl-
ing” effect and should be avoided.
5
HI-TRIM CONTROL
Used to adjust high notes and harmonic overtone response
from your instrument.