SWR Mo' Bass, Owner'S Manual

Page: 19 / 47

REAR PANEL FEATURES
THE INTERFACE PANEL
We call the right-most section of the Mo' Bass back panel the "Interface Panel" because between the unbalanced and
balanced output jacks and various switches available, you can "interface" with just about anything you want. Mixing boards in
a live venue or recording studio, additional power amps or signal processing - the options for what kind of signal you can
send to where are practically limitless.
Here's a rundown of what you get from the various outputs and features, and how the front and back panel controls and
switches affect them while running the unit in its simplest form: in Single Channel Mode ("Dual Mode" switched off) and with
nothing in the external effects loops.
UNBALANCED OUTS
Tuner Out
This is a direct signal straight off the input buffer, before the first gain stage, pre-everything. No controls will affect it, not
even the "Preamp Volume." This feature is totally isolated from the rest of the Preamp, therefore avoiding the "loading down"
of the instrument which could cause a loss in dynamic range.
To use this feature, plug in a shielded patch cord from the Tuner Out to the INPUT on your tuner. Turn the amplifier on and
you're ready to go.
Direct Out
With the "Line/Direct" switch in the "Direct" position, your signal sees the first tube stage and the limiter. Only the "Preamp
Volume" and "Limiter/Leveler" controls will affect the signal. With the "Line/Direct" switch in the "Line" position, the Direct Out
jack sees everything, including the Preamp EQ at all times and Mo' Bass effects when engaged.
Mo' Bass Out
This signal sees "Preamp EQ" at all times and Mo' Bass effects when engaged.
BALANCED OUTS
Direct Out
This output differs slightly from the unbalanced "Direct Out." With the "Line/Direct" switch in the "Direct" position, your signal
sees the first tube stage and the limiter, and only the "Preamp Volume" and "Limiter/Leveler" controls will affect the signal.
With the "Line/Direct" switch in the "Line" position, the signal will see the entire "Preamp" section, including the EQ. Mo'
Bass effects are never present on this jack. The 3-position pad switch (-10dB, 0, -20dB) directly underneath the jack will pad
the signal as indicated.
Mo' Bass Out
Like the unbalanced Mo' Bass out, this signal always sees everything, including the Preamp EQ at all times and Mo' Bass
effects when engaged. The 3-position pad switch (-10dB, 0, -20dB) directly underneath the jack will pad the signal as
indicated.
Ground/Lift Switch
The "Ground/Lift" switch affects the XLR jacks only, and affects both at once. Most often the "Ground" position is correct.
With the switch in the "Ground" position, the ground to pin 1 is engaged. In case of excessive ground noise (most likely
caused by a non-standard wiring of an XLR connection at a mixing console), use the "Lift" position. Moving the switch
to the "Lift" position will interrupt or defeat the ground on pin 1. Pin out for the XLR jacks on the Mo' Bass are as follows:
Pin 1 = ground
Pin 2 = positive
Pin 3 = negative
If a persistent hum exists after trying both positions of the ground lift, there is probably a miswire or bad ground in the feed
lines to the mixing board, or a dirty or miswired A/C socket.
13