These JBL Club 5501 Mono Amplifiers feature a compact design to allow fitment into more vehicles. JBL Club 5501 amps come standard with speaker-level and low-level inputs, letting the Club amps integrate with just about any car stereo. Unlike inferior models, JBL Club amps utilize variable electronic crossovers and bass boost circuits to allow for fine-tuning. Get authentic JBL power and performance today with these high-performance, mono car amplifiers.