Product Information

A combination of great design and massive power, the GM-A4704 amplifier gives you total installation freedom and no distortion. With a one-body heat sink and gain adjustment of up to 6.5V, you can turn your in-car audio experience into the sound staging environment that you’re looking for.   This 4-channel amp allows you to drive multiple speakers and sub woofers; it’s also bridgeable to power a single sub.

The technology of the GM Series
From dramatic distinction to dramatic design, Pioneer's new GM-Series amplifiers are thrillers in every sense, pushing the limits of flexibility and functionality.

Variable HPF
Variable HPF (high pass filter) allows for adjustable frequency from 40 Hz to 500 Hz* and greater car audio system flexibility according to sub woofer characteristics and personal listening preference.

Growing Power, Shrinking Size
New Pioneer amps brilliantly integrate high-power performance superior to that of previous models in space-efficient sizes for flexibility of installation in various car cabins.

Automatic Signal Sensing and Turn-On
Pioneer amplifiers automatically select the proper input signal mode, either RCA or speaker level. When the receiver is turned on, the amplifier automatically turns on. When connected to an OEM receiver or a receiver without RCA output and utilizing speaker level output, the amp automatically senses the input mode and powers up in sync with the receiver.

When connected to an OEM receiver or a receiver without RCA output using speaker wire, the amplifier is turned on at the same time as the receiver. Pioneer's amplifiers automatically detect the input signal and select the RCA level or speaker level.

Key features

• Number of Channels 4
• Amplifier Class AB
• Maximum Power Output 520W
• Maximum Power Output at 2 Ω 130W x 4
• Maximum Power Output at 4 Ω 80W x 4
• Maximum Power Output - Bridged at 4 Ω 520W
• Nominal Power (RMS) Output at 2 Ω 65W x 4
• Nominal Power (RMS) Output at 4 Ω 40W x 4
• Nominal Power (RMS) Output - Bridged at 4 Ω 130W x 2
• Frequency Response 10Hz ~ 70kHz (+0dB , -3dB)
• Total Harmonic Distortion (THD) <0.05% ( 10W, 1kHz)
• Signal-to-Noise (SN) Ratio > 94dB
• Fuse Rating 30A

What’s in the Box?

• Pioneer GM-A4704 520W Amplifier
• Fittings as per manufacturer
• User Manual

One Year Warranty