Pioneer GM-A4704 4-channel 520w Bridgeable Amplifier

CEA2006 Specifications Power Output: 40 Watts RMS x 4 Channels (4 ohms ≤ 1% THD+N) Signal-to-Noise Ratio: 78 dBa (Reference: 1 Watt into 4 ohms)

TECHNOLOGY OF 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) allow for adjustable frequency from 40 Hz to 500 Hz* and greater car audio system flexibility according to subwoofer 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 RCA level or speaker level.

Plays loud and clear

Why put an amplifier in your car? Pioneer's GM-A4704 4-channel amplifier will greatly improve the sound quality in your vehicle, so you'll find yourself looking forward to your time on the road. This punchy Pioneer will power your front and rear speakers with 40 watts RMS each, which is actually a large jump over the power supplied by a typical car radio. You'll hear much more of the little details in your music, especially when you turn your system up to overcome road noise.

4-channel versatility

Here's why lots of people start building their systems with a 4-channel amp. You can run your front speakers with the front channels (A) on this Pioneer, then combine the rear channels (B) to drive a subwoofer. Then, when you've got enough cash to buy a second sub and a dedicated amp for your bass, you can use your 4-channel to run all your speakers. You can also put this versatile amp into 2-channel mode to send up to 130 watts RMS each to a couple of component speakers or subwoofers.

Tone controls

The front channels sport variable high-and low-pass filters so you can better adjust the sound for critical front soundstaging or a finely-tuned bass. Switchable high- and low-pass filters on the rear channels help take the rumble away from full-range speakers or the sizzle away from a sub. Speaker-level inputs allow you to add the GM-A4704 to a factory system. If your vehicle needs a sonic upgrade, this amp's performance features and reasonable price make it a great choice.

Product Features:

• Pioneer A-Series GM-A4704
• Class-AB FullRange 2-Ohm Stable 4-Channel Amplifier
• RMS Power Rating:
• • 4 ohms: 40 watts x 4 chan.
  • 2 ohms: 65 watts x 4 chan.
  • Bridged, 4 ohms: 130 watts x 2 chan.
• Max power output: 520 watts.
• CEA-2006 Compliant Amplifier
• Pulse Width Modulated MOSFET power supply
• Balanced Isolator Input Circuit
• LED power (on) and protect (off) indicators
• Soft start turn-on
• 4, 3 or 2 channel operation
• Speaker-level (high-level) inputs with Signal Sensing Turn-on
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation
• Input sensitivity:
• • Low level: 300mV - 6.5V
  • High level: 3V - 26V
• Frequency Response: 10 - 70,000 Hz
• Total Harmonic Distortion (THD): <0.05%
• Signal to Noise Ration: >94 dB
• Selectable crossover modes (Ch A&B): LPF / OFF / HPF
• Crossover frequency Ch A: 80hz, 12 dB/octave
• Variable crossover frequency (Ch B): 40 - 500 Hz, 12 dB/octave
• Fuse Rating: 30A x 1
• 4 - 8 gauge power and ground wiring is recommended for installation. 
• Dimensions: 12-1/2"W x 8-1/2"L x 2-3/8"H
• 1-year Warranty