Step up your car's audio game with the Pioneer GMDX874 4-channel amplifier. The mighty yet mini Pioneer GMDX874 is crafted for a versatile fit and easy installation into all kinds of vehicles, thanks to its small size—half the size of the brand's class-AB amplifiers. Car audio is a game of swappability and customization, and finding the right audio components for your car can be tough. If you've never heard of an amp like the Pioneer GMDX874, this tech is designed to take in a weak, low-voltage signal from your car's stereo, then cleans and boosts it as the signal moves to your car's speakers. If you're upgrading your car audio, an amp like this is a must-have. Boosted Bass & Variable LPF/HPF Pioneer knows that one thing every driver wants out of their car audio amplifier is extra bass, and it's why they've upgraded the Pioneer GMDX874 amplifier with higher bass capabilities. The wired bass control remote lets users easily adjust the levels of lows in their car to match their listening preferences perfectly. And you won't need to worry about poor audio quality from the wrong signals; the Pioneer GMDX874 is designed around a variable low-pass filter. Between variable LPF and HPF, the audio frequency is adjustable to fit your preferences and what your subwoofers need. Adjust between 40HZ and 500Hz to hear things just the way you want to. Better Design, Optimized Circuitry This mini-master of audio is made for more than just bass: it's crafted for truly efficient circuitry. The Pioneer GMDX874 is designed with the circuit's Protection Control System. This can detect an unsafe rise in internal temperature, and can lower the amplifier's input level to help drop the temperature. The result is smarter circuitry that tries not to fry itself, even when you're busy enjoying the best elements of your playlists. Order your Pioneer GMDX874 amplifier online, or call our experts at 800-860-3577 if you have any questions. Abt's car audio specialists can help you tackle your auto audio project too: check out our car audio service page to learn more, or do a bit of research ahead of time with our car amplifier buying guide.