zapco Reference 360.4 - Dynamic Bass Control

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Dynamic Bass Control
ZAPCO offers a remote knob and mount for our bass equalization
circuitry. The Reference 500.1, 1100.1 and 1000.4 amplifiers have a “Bass
Boost” port on the control plate. Simply plug in the optional DBC (Dynamic
Bass Control) and you can make instantaneous changes in the bass contour
from the dash.