REAR PANEL
16
17
18
19
(16)
EFFECTS SEND LEVEL
This calibrated (0 – 10) control sets the level of signal being sent to external effects and/or
signal processors. Clockwise rotation increases the amount of signal being sent;
counterclockwise rotation decreases the amount. For the quietest operation, the EFFECTS
SEND LEVEL should be set as high as possible. Generally, the SEND and RETURN levels
should be set oppositely. If the EFFECTS SEND LEVEL is set low, the EFFECTS RETURN
LEVEL (19) is set high to achieve unity gain. If volume boost is desired, turn both controls to
higher settings.
(17/18) EFFECTS SEND / EFFECTS RETURN
These 1/4" mono (TS) jacks allow signal to be sent to and returned from external effects
and/or signal processors. Using shielded cables with 1/4" mono (TS) phone plugs, patch from
EFFECTS SEND to the input of the external device, and from the output of the external
device to EFFECTS RETURN. Only devices that do not increase signal gain should be used
in this effects loop (chorus, delay, reverb, etc.). If the footswitch is used, the EFFECTS
SELECTOR (33) switch must be depressed to activate the effects loop. See the
FOOTSWITCH section of this manual for explanation of switch operation.
(19)
EFFECTS RETURN LEVEL
This calibrated (0 – 10) control sets the level of signal being returned from external effects
and/or signal processors. Clockwise rotation increases the amount of signal being returned;
counterclockwise rotation decreases the amount. Again, SEND and RETURN levels should
be set oppositely, with the SEND level being high and the RETURN level low to ensure the
quietest operation.
(20)
REMOTE SWITCH
This seven-pin DIN connector is provided for the connection of the remote footswitch. The
footswitch cable should be connected before the amp is powered up. See the FOOTSWITCH
section of this manual for explanation of switch operation.
(21)
BIAS TEST TERMINALS
These terminals are provided to measure the bias of the amplifier's power tubes. A knob
behind the back panel grill allows for adjustment. Bias adjustment should only be done by a
qualified technician.
(22)
DAMPING SWITCH
This three-position switch allows adjustment of the amplifier's damping factor. Damping is the
20
21
22
23
24
25
26
6
27
28
29