Music on the go is something that is commonplace with everyone who hits the road. The JBL GX-A644SI 4-channel Power Amplifier is an effective audio amplifier. It is compact in size and high on performance. Available at a highly competitive price and a reassuring one-year warranty at Autodrome, the device is a truly fruitful investment for every music loving car owner. You can now set off on long adventurous drives to locations that are isolated and setup your own in-car sound system to enhance your experience.