JBL Stage A6004 4-Channel 1000w Car Amplifier - Black Open Box JBL Stage Amps are available in a variety of configurations, delivering the right power and number of channels for full-range and subwoofer applications. For more than four decades, JBL has made the audio experience a lot more satisfying for the car audio enthusiast. With a broad array of loudspeakers, amplifiers and subwoofers available, you can drive with ease and exhilaration. 4 channels 1000watts