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

The 4-channel GM-A6604 delivers a whopping 760 watts max - plenty of juice to power your speakers. It's also got built-in low-pass/high-pass crossovers, speaker level inputs for easy connection to an OEM headunit and oversized power terminals.

CEA2006 Specifications Power Output: 60 Watts RMS x 4 Channels (4 ohms ≤ 1% THD+N) Signal-to-Noise Ratio: 95 dBA (Reference: 1 Watt into 4 ohms)

 
Inspired by Excellence

Pioneer is constantly finding ways to make amplifier technology better. Our new and improved GM-Series prove how you can add cutting edge technology and more power to your system without breaking the bank. Like all Pioneer products, these amps are fully tested to ensure that each is designed and built for performance.

Higher Power

Having more power isn't just about LOUD. It's also about CLEAN, getting the most out of your speakers and your music. Constant road noise makes it hard for the music to be heard clearly. But with 760 watts max. power, you'll get to hear all the words and all the notes.

Variable LPF/HPF

Variable LPF (low-pass filter) and HPF (high-pass filter) allow for adjustable frequency between 40 Hz to 500 Hz and greater car audio system flexibility according to subwoofer characteristics and personal listening preferences. The GM-A6604 has a variable LPF/HPF on Ch. B and fixed LPF/HPF on Ch. A.

High Capacity Switching Power Supply

To suppress power supply loss, GM-Series ampl...

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

The 4-channel GM-A6604 delivers a whopping 760 watts max - plenty of juice to power your speakers. It's also got built-in low-pass/high-pass crossovers, speaker level inputs for easy connection to an OEM headunit and oversized power terminals.

CEA2006 Specifications Power Output: 60 Watts RMS x 4 Channels (4 ohms ≤ 1% THD+N) Signal-to-Noise Ratio: 95 dBA (Reference: 1 Watt into 4 ohms)

 
Inspired by Excellence

Pioneer is constantly finding ways to make amplifier technology better. Our new and improved GM-Series prove how you can add cutting edge technology and more power to your system without breaking the bank. Like all Pioneer products, these amps are fully tested to ensure that each is designed and built for performance.

Higher Power

Having more power isn't just about LOUD. It's also about CLEAN, getting the most out of your speakers and your music. Constant road noise makes it hard for the music to be heard clearly. But with 760 watts max. power, you'll get to hear all the words and all the notes.

Variable LPF/HPF

Variable LPF (low-pass filter) and HPF (high-pass filter) allow for adjustable frequency between 40 Hz to 500 Hz and greater car audio system flexibility according to subwoofer characteristics and personal listening preferences. The GM-A6604 has a variable LPF/HPF on Ch. B and fixed LPF/HPF on Ch. A.

High Capacity Switching Power Supply

To suppress power supply loss, GM-Series amplifiers incorporate a large toroidal transformer and are driven using a high-speed switching MOSFET. This stabilization of power supply maintains stable playback of all types of music.

Gain Control

What is power without control? To accommodate the varying range of signal levels coming from today's factory and aftermarket radios, all of Pioneer's GM-series amplifiers feature adjustable gain controls. This means that no matter what kind of radio is connected to this amplifier, the appropriate gain control adjustment can be made to ensure loud, clear, distortion-free music. And even if the gain control level is set improperly, Pioneer's Gain Control Caution feature will automatically reduce the amplifier's output until the headunit volume is decreased to acceptable levels. This added layer of protection helps to prevent damage from occurring to the amplifier and the speakers connected to it due to improper gain control adjustments.

Bringing the System Together

What, you DON'T own a Pioneer headunit? Well, we won't hold it against you. In fact we'll even help you build onto your system. The GM-A6604's speaker level inputs allow you to connect your OEM unit (or any unit that doesn't have the typical RCA-type inputs) without having to buy add-on adapters. SO, the install goes faster, you save money, and you've got a Pioneer amp in your vehicle.

Specifications

• Total Harmonic Distortion (4 Ω) : <0.05% (1 kHz) 4Ω
• Signal to Noise Ratio (IHF-A, at 1kHz) : > 95dB
• Channel number : 4/3/2
• Maximum Power : 760 Watts
• Continuous Power (2 Ω, ≤ 1% THD + N) : 90W x 4
• Continuous Power (4 Ω, ≤ 1% THD + N) : 60W x 4
• Inputs RCA's : 4 Channel
• Bridge Continuous Power (4 ohms) : 180W x 2
• Frequency Response : 10Hz ~ 70kHz
• Dimensions (Width x Height x Depth) : 348 mm x 60 mm x 215 mm

 

• Amplifier Class : Class-AB
• Load Impedance : 2 ~ 8 Ohm (Stereo), 4 ~ 8 Ohm (bridge)
• Bridgeable : Yes
• Channel number : 4, 3 or 2 Channels
• Balanced Isolator Input Circuit : Yes
• Regulated MOSFET Power Supply PWM : Yes
• Power Output (4 Ohm, <= 1% THD) : 60 Watts x 4
• Power Output (4 Ohm Bridge, <= 1% THD) : 180 Watts x 2
• Output Power (2 Ohm, <= 1% THD) : 90 Watts x 4
• Speaker Level Input : 4 Channel
• Input Level Control / Gain) : High-voltage (300mV ~ 6.5v)
• Crossover : LPF / HPF Variable (B-ch) LPF / HPF Fixed (A-ch)
• Crossover range : A B-ch-ch 80Hz 40 Hz to 500 Hz
• Crossover Pending : -12dB/oct.
• Reinforcing frequency Grave : 50Hz
• Reinforcement Level Grave : 0 ~ 12dB

 

• Power Output (4 Ohm, <= 1% THD) : 60 Watts x 4
• Power Output (4 Ohm Bridge, <= 1% THD) : 180 Watts x 2
• Output Power (2 Ohm, <= 1% THD) : 90 Watts x 4

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