User manual BOSS GT GT1380

[. . . ] They also all feature a +18 dB Bass Boost switch. All GT amplifiers have been designed to utilize100% MOSFET power supplies, ensurin g extremely rapid switching response for plenty of clean power. Four Channel Amplifiers GT 1180, GT 1380, GT 1480 Four Channel Bridgeable MOSFET Amplifier Tri-Mode Capable Heavy-duty Aluminum Alloy Heatsink Class A-B Operation Continuously-Variable Low Pass Crossover: 45Hz-90Hz Bass Boost Switch: 0 to +18dB Remote Subwoofer Level Control Continuously-Variable Input Gain Control High Pass Crossover: 200Hz Nickel Plated RCA And Speaker Level Inputs Remote Turn-On/Turn-Off Circuit MOSFET Pulse Width Modulated Power Supply 2 Ohm Stable Stereo Operation with Output Power Increase Soft Turn-On Circuit Thermal and Speaker Short Protection Circuitry LED Power and Protection Indicators Protection Circuitry 4 The amplifier protection circuitry will disable the amplifier if the inputs are overloaded, short-circuited or if extremely high temperature conditions are detected. [. . . ] It can also cause the protection circuit to engage. AUDIO SYSTEMS Electrical Wiring All BOSS GT series power amplifiers are equipped with easy top access screw terminals. These terminals are n ickel-plated in order to ensure excellent electrical contact and resist corrosion. High Level Inputs The GT 4-Channel amplifiers utilize a separate connector for Channels 1/2 and Channels 3/4. When making electrical connections to the amplifier, please observe the following: Use at least 8 gauge or heavier wire for power and ground connections. Wire the amplifier directly to the car battery. Make sure there is circuit protection (such as a fuse) on the positive power lead, within 18 inches of the battery. For the ground connection, use the shortest possible wire to a good chassis ground point. Wire the Remote connection to the remote turn-on lead of your equalizer or head unit. In some cases cases this may be the power antenna lead of the head unit. Four Channel Amplifiers: GT 1180, GT 1380, GT 1480 WARNING: If you use the HIGH LEVEL (speaker) inputs, do not use the LOW LEVEL inputs at the same time. Remote Subwoofer Level Control 6 All BOSS GT series power amplifiers are equipped with a dashboard mount remote subwoofer level control. Run the supplied dashboard remote control from the front panel of your amplifier. By turning the level knob clockwise, you will increase the output of low frequencies. CHANNEL 2 (+) CHANNEL 2 (-) CHASSIS GROUND CHANNEL 1 (-) CHANNEL 1 (+) 7 Fuses Fuses protect both the amplifier and the electrical system of your vehicle from faulty conditions. If you must replace the fuse in your GT amplifier, use a fuse of exactly the same type and rating. A different type or rating may result in damage or cause a fire. HEAD UNIT Mounting the Amplifier Mark the location for the mounting screw holes by positioning the amplifier where you wish to install it and use a scribe (or one of the mounting screws) inserted in each mounting hole to mark the mounting surface. If the mounting surface is carpeted, measure the hole centers and mark with a felt tip pen. [. . . ] If the channel which is silent switches to other side, the problem is either in the head unit/other source or the connecting tables. Weak Output Noise in the Audio Readjust the Input Sensitivity Control to better suit the input signal. If the noise is a "whine" whose pitch follows the engine speed, confirm that the amplifier and any other signal sources ( head unit, etc. ) are properly grounded. [. . . ]