Crate Amplifiers BT220H System Block Diagram:

BT220H Bass Amplifier
7
System Block Diagram:
BUFFER
INPUT
-15dB PAD LEVEL LOW LOW
MID HIGH MID HIGH CHANNEL
SWITCH
PRE LIMIT
POST
MUTE
EQ
NOISE
GATE
GAIN
DISTORTION
LEVEL
TUNER
A BC D EF G
SHAPE
LEVEL
OCTAVE
MASTER
BALANCED
LINE OUT
VOLUME
BALANCED
LINE OUT
GND/
GND
LIFT
EFFECTS
BLEND
EXTERNAL
SPEAKER
EXTERNAL
SPEAKER
SEND
HEAD
PHONES
POWER
AMP
ATTENUATOR
PREAMP
OUT
POWER
AMP IN
RETURN
CD
INPUT
EFFECTS LOOP
FOOT
SWITCH SWITCHING
CIRCUITRY