Input: Instrument input. Designed for both active and passive pickups.
Send: This jack provides an unbalanced output from the preamp, it does not include effects or tone control signal.
Return: This jack provides a signal pre-eq. It automatically disconnects the preamp when used.
Volume: Adjusts the overall loudness of the amplifier.
Bass: Adjusts the amount of cut or boost in the low frequency range. Treble: Adjusts the amount of cut or boost in the high frequency range.
HZ: Sets the frequency of the 18db cut NOTCH FILTER that is used to control resonant feedback.
Notch Filter: ON/OFF adjusts the amount of cut or boost in the low frequency range.
Shape: ON/OFF This toggle switch enables or disables the SHAPE control. The shape control is a mid dip control. In the on position the mid frequencies will be cut and the high and low frequencies will be boosted.
Power: This rocker switch turns the AC power ON and Off. When ON the switch is illuminated to indicate the unit is ready for play.
Back Panel AC Input: Connect the female end of the AC line cord here. Connect the male plug to a suitable source of line voltage. Refer to the voltage information on the back of the amplifier for its voltage and current requirements. This connector also acts as the main fuse holder and includes a compartment for a spare fuse.
Line out: This jack provides anunbalanced output from the preamp that is post eq and post efx. This send can be used to feed a signal to a recording or sound reinforcement mixer. Additionally this output can be used to drive a slave amp such as the ULTRASOUND AG-50E.
Direct out: Balanced output signal used to feed recording or sound reinforcement equipment. Protection Short circuit and thermal overload