AMPEG SVPCL
User Guide

SVPCL Bass Preamp

Changing the Tubes:
Tube wear is in direct proportion to how often and how hard you play. Preamp tubes aren�t worked as hard as power tubes and typically last longer. When a preamp tube wears out, the preamp may squeal, get noisy, lose gain and sensitivity, or just quit working. A service center can determine which tube(s) may need replacing. To get to the tubes in the SVPCL, the top must be removed. This should be left to a qualified service person.

System Block Diagram:

TRANSFORMER BALANCED LINE OUTPUT PRE TUNER OUTPUT POST MUTE GND LIFT

PEAK

PAD INPUT

GAIN PREAMP OUTPUT MASTER ULTRA HIGH BASS TREBLE MID MID FREQ. BUFFER PREAMP OUTPUT

MUTE

ULTRA LOW

7