Boss Audio Systems GT 1180, GT 1480, GT 1580, GT 1380 specifications A T U R E S

A M P L I F I E R S

F E A T U R E S

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
4	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
	Five Channel Amplifier
	GT 1580
	Five Channel Bridgeable MOSFET Amplifier
	Tri-Mode Capable
	Heavy-duty Aluminum Alloy Heatsink
	Class A-B Operation
	Continuously-Variable Low Pass Crossover: 45Hz-90Hz
	(all channels)
	Bass Boost Switch: 0 to +18dB (CH1-CH4)
	Variable Bass Boost: 0 to +18dB (CH5)
	Remote Subwoofer Level Control
	Continuously-Variable Input Gain Control
	High Pass Crossover: 200Hz (Channels 1-4)
	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

Built-in Crossover

If you observe that the protection LED is lit, please check the system carefully to determine what has caused the protection circuit to engage. The amplifier can be reset by turning

All GT amplifiers feature built-in electronic crossovers.
The MonoBlock amplifier (GT1000M) features an continuously-variable low pass and an
+18dB Bass Boost switch.	AUDIO
The 2 Channel, 4 Channel and 5 Channel GT amplifiers feature continuously-variable low
pass crossovers and fixed high pass crossovers. They also all feature a +18 dB Bass Boost switch.
All GT amplifiers have been designed to utilize100% MOSFET power supplies, ensuring
extremely rapid switching response for plenty of clean power.
Protection Circuitry
The amplifier protection circuitry will disable the amplifier if the inputs are overloaded,
short-circuited or if extremely high temperature conditions are detected. When the protection
mode is in operation, the LED indicator on the front panel will be illuminated, indicating	SYSTEMS	5
the amplifier has gone into a self-preservation mode.
the remote power off and then on again. If the amplifier shuts down due to a thermal

overload condition, please allow it to cool down before powering up. If the amplifier shuts down because of an input overload or short circuit, be sure to repair these conditions before attempting to power up the amplifier again.

2 Ohm Operation (in stereo mode)

Your GT amplifier was designed to operate effectively at loads as low as 2 Ohms. This means that you can install four 8 Ohm speakers per channel when using parallel wiring. Increasing the number of woofers per channel at low frequencies (up to 100Hz) produces an acoustic coupling effect. This acoustic coupling increases your power output by 3 dB per speaker.

When operating at 2 Ohms, the amplifiers will increase their output power by approximately 50%. The current draw will also increase by about the same amount. So be sure you have enough current to run the amplifiers into a 2 Ohm load. If you lack adequate current, your music reproduction will be distorted.

Please note: The gain control of any car audio amplifier should not be mistaken for a volume control. It is a sophisticated device, designed to match the output level of your audio source unit to the input level of the amplifier. Do not adjust this input level to maximum unless your input level requires it. Ignoring these instructions will result in an input overload to the amplifier, and excessive audio distortion. It can also cause the protection circuit to engage.