Warwick AMPs Owner's Manual

Also see for Amplifier Quad IV: Owner's manual User guide Wiring diagram Owner's manual

Contents

18Pro Tube IVFRONT PANEL CONTROLSREAR PANELGROUND LIFT switch isolates the earthconnection from the ground of signal. Shouldseveral devices be simultaneously connected toearth by the same conductor as well as via lineconnections, a so called hum loop might appear. Inthis case operate the GROUND LIFT switch toeliminate the current hum (when pressed).DI PRE/POST switches the signal lying at the DIOUT sockets.PRE unmodified bass signal (it is retained onboth DI OUT sockets),POST the tone control and effects loops areinserted into the signal path in stereo.DI OUT LEFT and DI OUT RIGHT sockets forsupplying a stage or studio mixing console.TUNER OUT socket for the connection of a tuner.When MUTE mode is activated,the unmodified bass signal is retained here.LINE OUT L + R sockets allow to connectadditional power amplifiers.EFF. LOOP for the insertion of effects units.Connect SEND with the input and RETURN L.and RETURN R. with the outputs of the effectsdevice.CHANNEL 1/2 FOOTSWITCH allows toconnect a footswitch for selecting between bothchannels. To do so use a switch (latch) and not akey (unlatch).SPEAKER OUT sockets designed to supplyloudspeaker cabinets. One XLR and one Speakonsocket are provided. Both are connected inparallel. The signal from the Speakon output isleaded by 1+ and 1-.INPUT socket to plug in a bass guitar.GAIN control + 3 LEDs to adjust the input level:CLIP too high,OK optimum,LOW too low.LIMITER switch + 2-colored LED to compressthe signal (channel 2 only):green Limiter on,red the signal level is actually beingreduced.For features of CHANNEL 1, please refer to thechapter CHANNEL 1-TUBE.For features of CHANNEL 2, please refer to thechapter CHANNEL 2-SOLID STATE.OUTPUT control for each channel + OL(overload) LED to mutually balance both channellevels. Should the OL LED light up, reduceOUTPUT of the respective channel. The standardsetting, i.e. with neither attenuation noramplification, is position 8 (when tone controls areset linearly).CH. SELECT + two LEDs to switch from channel1 (red) to channel 2 (green).PHONES socket for connecting a headphone (min200 Ω).MUTE switch + red LED cuts the signal from alloutputs, except from the PHONES socket, andactivates the TUNER output (rear panel).MASTER control determines the mains level.POWER switch for turning the amplifier on andoff.