features may be provided with the active pickup, such as equalization, volume control and compression. Tuner Output Jack — The “tuner output jack” is provided to allow a tuner to remain plugged into the amplifier while playing. This output remains active when the “mute switch” is pressed, allowing for tuning your instrument while not sending signal to either the “direct output” or the speaker. Signal level of
Input Signal Mute Switch — The input on the
Input Gain Controls & O/L LEDs — The “input gain” controls, in conjunction with the signal and clip LEDs, allow you to adjust the preamp input gain sensitivities to the instrument you are playing. Basses can have an output level from a few thousandths of a volt to several volts. Generally, you want to see only an occasional flash of the red clip LED when you really hit the string hard, then adjust the master volume control for playing volume. Distortion of the preamp gain stage will occur when the red clip LED is illuminated, so plan accordingly. The best signal to noise ratio will result with the above method. Setting your playing volume will be a combination of the “FET gain control” (FET channel), “TUBE gain control” and “TUBE volume control” (TUBE CHANNEL) and the “master volume control”, depending in part on individual preference. Intentional overloading of the tube channel may be desirable and the O/L LED indicates that you are operating the tube preamp stage in the overdrive mode. The FET and TUBE preamps are switchable and mixable. These features are also controlled by the optional 2 button footswitch. Both CHANNEL O/L LEDS are active at all times monitoring each channel’s audio level, independent of channel switch position.
Signal Shaping Switches and Controls — There are 3 separate shaping filters on the
Active 5 Band Equalization — The “active 5 band equalization” used in the
Low Frequency - 80 Hz
Mid Frequency – 500 Hz
High Frequency - 4000 Hz
Master Volume — The “master volume control” is
Master Section Status Indicators —
∙The “power LED” indicates that the amplifier is on and the low voltage regulated power supplies are active.
∙The “protect LED” indicates that the amplifier is in “protect” mode and the output relay is