Features

Overview: The Sony XM-GS4 is a 4-channel amplifier with a wide frequency response of 10Hz-100kHz. The extended response allows you to enjoy the full-range sound of High-Resolution Audio sources, such as the RSX-GS9 Digital Media Receiver. The XM-GS4 comes with a 4-channel speaker-level input harness and mounting screws.

CEA-2006: The XM-GS4's power ratings are measured according to the Consumer Electronics Association's CEA-2006 standards. These standards allow you to accurately compare the rated power output of all CEA-2006 compliant amplifiers, even from different brands. Manufacturers who adhere to the standards can display the CEA-2006 logo on their products and packaging. CEA-2006 Specifications:

• Power Output: 70 watts x 4 at 4Ω (with <1% THD+N)
• Signal-to-Noise Ratio: 93 dBA (1 watt into 4Ω)

Other Power Ratings:

• 80 watts x 4 at 2Ω (14.4V supply voltage, 20Hz-20kHz, 1% THD)
• 160 watts x 2 at 4Ω bridged

Protection Circuitry: The amp has three protection circuits:

• Thermal: turns the amp off when the operating temperature is too high
• Short Circuit: turns the amp off when the speaker outputs are short-circuited
• DC Offset: turns the amp off when it generates direct current

Controls: The amplifier's controls are located on the top, under a removable cover. There are independent controls for the front and rear channels. The rotary controls can be set with a small slotted screwdriver (not included). The amp's controls include:

• Level: The Input Level control is rotary dial that sets the amp's input to the output of the source unit. The amp will accept a Line Level input between 0.3V and 6V, or a High Level (speaker level) input between 3V and 12V.
• Crossover: The crossover can be set to High Pass, Low Pass, or Off (full range) via a 3-way switch. The crossover cutoff frequency can be set via a rotary control (labeled "Filter") between 50Hz and 300Hz.
• Subsonic Filter: The Subsonic Filter sets the low end of the frequency range, and filters out extremely low frequencies that cannot be easily reproduced by speakers. With these frequencies eliminated, the amp runs more efficiently and cleanly. The rotary control can set the filter's cutoff frequency between 6Hz and 70Hz.
• Low Boost: The amplifier's Low Boost circuitry increases the bass response around 40Hz from 0dB and +10dB.

Connections: The XM-GS4 features gold-plated connectors that are all aligned on one side of the amplifier for ease of installation. The top cover should be removed when making connections to the amp. The power and speaker output connections are screw terminals that can be tightened/loosened with a slotted or Phillips head screwdriver (not included). The amp includes the following connections:

• Power/Ground Terminals: The power and ground screw terminals are 0.55" wide, and will accept bare wire or spade connectors. An 8-gauge amplifier wiring kit should be used to connect the amp, with a 60A fuse on the power wire within 18" of the battery.
• Remote Terminal: The remote turn on connection is a 0.36" wide screw terminal. A small gauge wire (18 AWG) can be used for this connection.
• Speaker Outputs: There are two pairs of screw terminals for connecting the speaker outputs. Each terminal is 0.36" wide, and will accept bare wire and spade connectors.
• Speaker-level Input Harness: A speaker level input harness with an 8-pin Molex connector is included, allowing you to easily connect the amplifier to a factory radio or a receiver without preamp outputs.