Operation Manual

DIRECT INTERFACE (DI)

This is a built-in, balanced Direct Interface that sends a buffered, unprocessed signal to an external mixer.

GROUND LIFT: This button is provided to prevent a ground loop that may result in "hum" noise. When

depressed (IN position), Ground Lift is engaged.

ACTIVE/PASSIVE PICKUP Inputs

These 1/4" inputs are included so you can choose the appropriate setting for your instrument. The gain

structure of the amplier is modied to accommodate the outputs of different pickup congurations.

GAIN

This knob controls input level of the instrument.

TT BOOST SWITCH

This TransTube

crunch circuit is designed so that the volume of the amp will not change when the boost

is switched on, but the distortion level will increase depending on the level of the GAIN knob. For best

results, rst set the distortion amount by adjusting the GAIN. Next, set the desired volume using the VOL-

UME knob. At this point, the clean volume will match if the TT BOOST is turned off.

PUNCH

This switch engages a boost of 6dB at 100Hz, which greatly enhances the low-end presence of the bass

guitar.

BASS

This knob provides a shelving tone control for low frequencies and provides cut/boost of +/-15 dB. The

center point is at. The center frequency is 50 Hz. -3 dB shelf corner frequency is 100Hz.

MIDDLE

This knob provides a peaking tone control for Mid frequencies and cut/boost of +/-15dB. The center point

is at.

MID SHIFT

This switch controls the center frequency of the MIDDLE knob. When the switch is OUT, the middle fre-

quency is 600Hz. The middle frequency is 250Hz when the switch is pushed IN.

TREBLE

This knob provides a shelving tone control for high frequencies and cut/boost of +/-15dB. The center

point is at and the frequency is 8 KHz. -3dB; the shelf corner frequency is 5 KHz.

BRIGHT SWITCH

This button provides a 10 dB boost to frequencies above 1KHz. To activate, depress the switch to its “IN”

position.

PSYCHO-ACOUSTICS EFFECT SWITCH

The human ear does not hear low frequencies as well as higher frequencies. This means that as bass

goes lower, more and more power is required. The MAX

Psycho-Acoustics effect solves this problem by

identifying extremely low notes, generating harmonics based on the notes, and then blending the har-

monics with the original note, making the lows seem louder and tighter without eating up excess power

amp headroom.

Front Panel MAX

115 and 112

1 7 8

1410