Description: Hand-assembled components housed in an electrostatically
shielded, epoxy module
Function: Master volume, pickup blend, bass, midrange, and treble boost/cut
with 3-position midrange frequency switch
Specifications: Output level -10dBm
Power requirements: One 9-volt battery
Battery life expectancy: 500 hours continuous use
About the systemMaster volume control. Controls overall volume level. Turning the control clockwise increases the volume; turning the control counterclockwise decreases the volume. Pickup blend control. Controls relative blend of pickups. Turning the control clockwise emphasizes the bridge pickup. Turning the control counterclockwise emphasizes the neck pickup. The detent, or “click,” in the center of the control is the point where both pickups are on equally. Bass control. 15dB boost or cut of bass at a center frequency of 50 Hz. Turning the control clockwise boosts the bass. Turning the control counterclockwise cuts the bass. The detent, or “click,” in the center of the control is the “flat” position, zero boost or cut. Midrange control. 15dB boost or cut of midrange at a center frequency determined by the switch selection. Turning the control clockwise boosts the mids. Turning the control counterclockwise cuts the mids. The detent, or “click,” in the center of the control is the “flat” position, zero boost or cut. Treble control. 15dB boost or cut of treble at a center frequency of 5kHz. Turning the control clockwise boosts the treble. Turning the control counterclockwise cuts the treble. The detent, or “click,” in the center of the control is the “flat” position, zero boost or cut. Mid frequency switch (ZB-4.3 only). Down position @ 250 Hz. Center position @ 400 Hz. Up position @ 700 Hz. Pickup input level trimmer (ZB-4.0 only). Attenuates input level from pickups. Turning clockwise increases input level from pickups to preamp. While this increases gain, too much input level can cause distortion. Factory setting is set clockwise, just under the first sign of distortion. Output level trimmer. This control on the circuit module attenuates overall output level. Its factory setting is the mid position. Caution: Setting gain too high may cause distortion. |
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