More about the product
The Pioneer GM-A6704 is a 4-channel bridgeable amplifier designed to deliver solid performance for car audio systems. With a sleek black chassis and compact footprint, it fits easily into most vehicle setups without taking up too much space. The GM-A6704 offers a maximum power output of 1000W, making it suitable for powering a combination of speakers and subwoofers in a mid-range system.
This model supports both 2-channel and 4-channel configurations, giving users flexibility depending on their setup. It features a variable low-pass filter and high-pass filter, allowing for better control over sound frequencies and helping to optimise audio clarity. The built-in Bass Boost function enhances low-end response, which is useful for those looking to add more depth to their music.
Installation is straightforward thanks to speaker level inputs, which allow the GM-A6704 to connect directly to factory head units without needing RCA outputs. This makes it a practical choice for upgrading stock systems. The amplifier also includes automatic signal sensing and turn-on, simplifying integration with existing setups.
The GM-A6704 uses Class AB amplifier technology, which balances sound quality and efficiency. While it may not be as power-efficient as Class D models, it offers cleaner audio reproduction, especially at moderate volumes. The unit includes protection circuitry to guard against short circuits and overheating, helping to ensure long-term reliability.
Although the GM-A6704 doesn’t include wireless connectivity or advanced DSP features, it focuses on delivering dependable power and sound control for everyday use. It’s best suited for users who want to improve their car’s audio performance without investing in high-end gear.
Overall, the Pioneer GM-A6704 is a well-rounded amplifier that offers flexibility, ease of installation, and solid sound enhancement features. It’s ideal for powering a full speaker setup or bridging channels to drive a subwoofer, depending on the user’s needs.
Technical details
- Brand
- Pioneer
- Warranty
- 12-months
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Why Choose Bankstown Sound for Your Car Audio & Tech Upgrades
At our Bankstown Sound store and workshop in Sydney, our team ensures every car and auto audio installation and upgrade starts with an understanding of how you use your car. Our team works with you to understand your driving habits, the features you rely on, and the problems you’re trying to solve.
Most factory setups are built to broad standards and often lack the clarity or seamless connectivity required for how people actually drive. That’s why we focus on modernising your dashboard and audio performance based on how you use your vehicle.

