Warwick ProTube IX Manuel D’Utilisation

23

GROUND LIFT switch isolates the earth
connection from the ground of signal. Should
several devices be simultaneously connected to
earth by the same conductor as well as via line
connections, a so called hum loop might appear. In
this case operate GROUND LIFT to eliminate the
current hum.

DI PRE/POST switches the signal lying at the DI
OUT sockets.
PRE

the unmodified bass signal is retained on

both DI OUT sockets,
POST the tone control and effects loops are
inserted into the signal path in stereo.

1.  INPUT socket to plug in a bass guitar.
2.  GAIN control + 3 LEDs to adjust the input

level:

CLIP too high,
OK

optimum,

LOW too low.

3.  CH. SELECT + 2-colored LED to switch from

channel 1 (red) to channel 2 (green).

4.  LIMITER  switch + 2-colored LED to

compress the signal (channel 2 only):

green Limiter on,
red

the signal level is actually
bein reduced.

5.  For features of CHANNEL 1, please refer to

the chapter CHANNEL 1-TUBE.

6.  For features of CHANNEL 2, please refer to

the chapter CHANNEL 2-SOLID STATE.

7.  OUTPUT  control for each channel + OL

(overload) LED to mutually balance both
channel levels. Should the OL LED light up,
reduce OUTPUT of the respective channel.
The standard setting, i.e. with neither
attenuation nor amplification, is position 8
(when tone controls are set linearly).

8.  EFF. MIX controls determine the degree to

which the effects within the parallel stereo loop
(rear panel) affect the signal of each channel.

9.  PHONES socket for connecting a headphone

(min 200 Ω).

10. MUTE switch + red LED cuts the signal from

all outputs, except from the PHONES socket,
and activates the TUNER output (rear panel).

11. MASTER control determines the mains level.
12. POWER switch for turning the amplifier on

and off.