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Pioneer GM Digital Series Amplifiers

A Commanding Performance
Traditional analog amplifier designs are electrically and thermally inefficient--converting as little as 30% of their electrical power into acoustical energy, while the rest is wasted as heat. The dispersion of this excess heat requires large and heavy heatsinks, increasing the size and reducing the installation flexibility of a traditional analog amplifier. Pioneer's GM Digital amplifiers utilize Class-D amplifier technology to produce a compact, high-power amplifier that converts as much as 70% of its input power to sound.

Serious Sound. Small Space.
The compact size of the GM digital amplifiers enables them to be installed in more places in your vehicle. If you want your system to be heard and not seen, Pioneer's GM digital series is the perfect choice, as it's both small and powerful. The advanced circuitry of the GM-7500M model for instance, is 45 percent smaller than its analog counterparts, increasing your installation options in tight spaces. Now you can enjoy superior audio amplification and installation flexibility from a compact product.

Bridge Your System With Digital
The GM Digital line of amplifiers has already earned an impressive reputation with Pioneer retailers and customers alike. This year, for the first time, a full-range solution joins the digital line-up in the form of the GM-D9500F. You can now harness the compact, powerful qualities of digital design to create a full-range, fully digital system.

GM-D8500M Features

Efficiently Compact, Awesome Power
Class-D amplifiers overcome the inefficiencies of traditional Class-A or AB amplifiers. Pioneer's Class-D amps transform very little power into heat so a higher percentage of the power supply (67 %) is transformed into the load. This results in a very compact amp which needs less input power to produce very high output power. The Class-D amplifier's PWM (Pulse Width Modulator) modulates the original audio input signal with a triangulated signal wave which has a much higher fixed frequency. The result is a digital signal which contains both the input signal and a band of frequency components around the modulation frequency. A LPF (Low Pass Filter) then filters out the high frequency pulses and the resulting amplified output signal is then sent to the subwoofer and/or speakers.

Selectable 50Hz Bass Boost
Bass boost gives you more control over how your music sounds. It lets you set the optimal bass level for each speaker/sub connected to the GM-D8500M, so the tone controls from your headunit can do what they do best. And because this is variable bass boost, you can set the level between 0 and 12dB with the remote.

Built-In Crossover (40~240Hz Low-Pass Filter)
Built into the GM-D8500M is a very smart crossover network. It works like a gateway, routing the big bass signals (adjustable from 40 to 240Hz or lower, at -12dB/octave) and filtering out higher-frequency signals to that subwoofer. This optimizes your system's efficiency and delivers the best possible sound quality.

Speaker Level Inputs
What, you DON'T own a Pioneer head unit? Well, we won't hold it against you. In fact we'll even help you build onto your system. The GM-D8500M'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.