User manual LEXICON GX-7

[. . . ] Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus (including amplifiers) that produces heat. Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Unplug this apparatus during lightning storms or when unused for long periods of time. [. . . ] When the unit is in standby, pressing the standby/on button activates the power amplifier. Note: When the status of the GX-7 changes, relay clicks may be audible. 2-2 GX-7 Basic Operation REAR PANEL OVERVIEW The GX-7 rear panel is shown below. The numbers in the rear panel illustrations correspond with the numbered description items. 1 3 4 INPUTS RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE LEFT TRIGGER INPUT 12VDC GX-7 LEXICON, INC. Note: The Class 2 Wiring label is required for any unit in which the audio output power exceeds 10 watts per channel under normal operating conditions or the unit is intended to be installed or connected by a qualified person. 4 REMOTE TRIGGER INPUT Enables the GX-7 to be controlled by the MC-12HD/MC-8 or other external devices with a 12V DC trigger output. Connect the trigger output of the external device to the TRIGGER INPUT of the GX-7 amplifier. The GX-7 will automatically respond when the external device is powered on and off. When the controlling device is turned on, the amplifier will turn on after a short pause. This pause is intentional and serves to protect the speakers from damage while the unit stabilizes. This is normal operation. 3 MASTER POWER SWITCH Connects and disconnects power to the AC Input Connector. Set this switch to off when making or breaking connections to the amplifier. 2-4 GX-7 Basic Operation REMOTE POWER ON WITH EXTERNAL AC TO DC POWER CONVERTER If your preamplifier, processor or receiver does not have a dedicated trigger jack, it is still possible to activate the unit for automatic power on when a Switched Outlet is available on the source device rear panel. To control the GX-7 in this instance, a small AC to DC power converter capable of delivering a 6 to 12 volt DC signal is required. Plug the AC adapter into a switched outlet that will be activated when you wish to have the amplifier power on. This may be the switched outlet at the rear of an AC receiver or other audio component. Connect the 3. 5mm mini-plug from the adapter to the GX-7 rear panel TRIGGER INPUT. The GX-7 will now turn on and off automatically, depending on the status of the controlling device. 5 AC POWER CONNECTOR The AC input connector provides power to the unit with the supplied power cord. Do not use an extension cord. CAUTION! Never make or break connections to the GX-7 unless the GX-7 and all associated components are powered off. 6 FUSE HOLDER The GX-7 uses internal fuses to protect itself and the speakers from possible damage. In the event that a replacement fuse is needed, be sure that a fuse of the original rating is used. In this event, contact Lexicon customer service. POWER CONTROL CONNECTIONS The GX-7 features a built-in remote power-on system that will automatically switch the amplifier on when another device in the system is switched on. REMOTE TRIGGER POWER ON To connect to a 12V trigger jack: Using an accessory cable with a 3. 5mm mono mini-plug on each end, connect the trigger-output jack on the rear of the source device to the GX-7 rear panel TRIGGER INPUT. When these connections are made, the GX-7 will automatically power on whenever the triggering device is turned on. 2-5 Basic Operation POWER CONNECTION SAFETY After all audio and system connections have been made, connect the power cord to an AC power source. Be sure that the GX-7 is powered off and that the device connected to the remote trigger input is off when connecting the power cord and plugging it in to an AC outlet. Lexicon All volume and level adjustments are made on your preamplifier, controller or surround processor. When using the GX-7 for the first time, you should re-set the output levels of the channels on your processor. [. . . ] Customer Service assists authorized Lexicon dealers in solving problems effectively. When purchasing Lexicon products, customers make a substantial investment in audio/video equipment of exceptional quality. In the event that service is needed, Customer Service intends to provide assistance that matches that investment. If this Lexicon product requires service, contact an authorized Lexicon dealer for assistance. [. . . ]