Warwick ProTube IX, ProTube IV owner manual Front Panel Controls, Rear Panel

FRONT PANEL CONTROLS

1.	INPUT socket to plug in a bass guitar.				(overload) LED to mutually balance both
2.	GAIN control + 3 LEDs to adjust the input				channel levels. Should the OL LED light up,
	level:	CLIP	too high,		reduce OUTPUT of the respective channel.
		OK	optimum,		The standard setting, i.e. with neitherIX
		LOW too low.			attenuation nor amplification, is position 8
3.	CH. SELECT + 2-colored LED to switch from				(when tone controls are set linearly).
	channel 1 (red) to channel 2 (green).			8.	EFF. MIX controls determine the degree to
4.	LIMITER switch + 2-colored LED to				which the effects within the parallel stereo loop
	compress the signal (channel 2 only):				(rear panel) affect the signal of each channel.
		green	Limiter on,	9.	PHONES socket for connecting a headphone
		red	the signal level is actually		(min 200 Ω).
			bein reduced.	10.	MUTE switch + red LED cuts the signal from
5.	For features of CHANNEL 1, please refer to				all outputs, except from the PHONES socket,
	the chapter CHANNEL 1-TUBE.				and activates the TUNER output (rear panel).
6.	For features of CHANNEL 2, please refer to			11.	MASTER control determines the mains level.
	the chapter CHANNEL 2-SOLID STATE.			12.	POWER switch for turning the amplifier on
7.	OUTPUT control for each channel + OL				and off.	Tube
			REAR PANEL
GROUND		LIFT	switch isolates the earth	DI PRE/POST switches the signal lying at the DI
connection from the ground of signal. Should				OUT sockets.
several devices be simultaneously connected to				PRE the unmodified bass signal is retained on
earth by the same conductor as well as via line				both DI OUT sockets,
connections, a so called hum loop might appear. In				POST the tone control and effects loops are
this case operate GROUND LIFT to eliminate the				inserted into the signal path in stereo.		Pro
current hum.

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