the output stage of a class-ab amplifier combines the advantages of a class-a amplifier and a class-b amplifier, while reducing the problems of low efficiency and distortion associated with them.

adjustable high-pass/low-pass crossover filter

concert amplifiers have a high pass filter (hpf) and a low pass filter (lpf) that allows you to adjust the frequency from 40hz to 400hz based on your musical taste to deliver the appropriate music frequencies to your speakers.

automatic switch-on device

with high-level signal inputs, the amplifier automatically turns on as soon as a DC offset (>2.5 volts) is detected. using the line-level signal inputs, the amplifier will also turn on when a +12v signal is received from the remote turn-on wire.

efficient cooling design

high-performance amplifiers are not only powerful, but also compact, which depends on the overall effective cooling design.

concert sound and elegant appearance

jbl concert amplifiers provide an extraordinary sound experience with an elegant industrial design.

reliable performance

to ensure high-quality sound and reliable performance, concert amplifiers select high-quality components such as audio capacitors, power mosfet. these boosters must also go through a rigorous testing process to eliminate unstable boosters. jbl freezes them, bakes them, shakes them, shines ultraviolet light on them and runs them at full power for several days.

technical data

4 channel class ab car amplifier

rated power rms output: 70 wx 4 at 4 ohms; 90 wx 4 at 2 ohms; 180 wx 2 at 4 ohms in bridge mode, <1%thd

full/high-pass/low-pass filter: 40-400hz, 12db/octave

signal/noise ratio (1w at 4 ohms): >75db

frequency response (-3db): 10hz – 45khz