Lexicon
Front Panel Controls
Power and Standby
Guitar Input
Gain
(Pull for Boost)
As with any tube amp, you’ll get the longest life from the tubes by using the Power and Standby controls properly.
The Standby switch should be in the standby position before turning the amp on with the Power switch. After switching the Power on, allow the amp to warm up for 30 seconds or so before switching Standby to On.
To protect speakers and other audio equipment connected to the Signature 284 (as well as your ears), switch the amp to Standby before inserting a guitar cord into the input jack. Do not switch out of Standby until all connections between the guitar and the amp (stomp boxes, etc.) have been made.
Switch to Standby whenever the amp will be idle for more than a few minutes (between sets, or when listening back to the mix). If the amp is not going to be used for an extended period of time (more than an hour or so),switch to Standby and turn Power off.
Guitar Input jacks are provided at both the front and rear. Select one of these for your guitar input. (The rear panel input is provided as a convenience for custom installations — the input at the front panel overides any input at the rear panel.)
This is the preamp input sensitivity control. It controls the amount of preamp overdrive or distortion. For guitars with passive pickups, the cleanest tones can be found at settings from
The Gain knob is also a push/pull switch. Push the knob in for tones ranging from clean to vintage blues. Pull the knob out for tones that cover the range from vintage blues to modern, high gain distortion.
Throughout this manual, the drawings that represent the Gain control will be shaded to show the knob pulled OUT, unshaded to show it pushed IN.
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