JBL Grand Touring Series GTO75.4 II 4-ch Car Audio Amplifier 104/142 watts RMS X 4 4-channel car amplifier 104 watts RMS x 4 at 4 ohms (142 watts RMS x 4 at 2 ohms) 284 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode) optional internal neon lighting (accommodates Street Glow AN9 tubes or equivalent, tubes not included) variable high- and low-pass filters (32-320 Hz, 12 dB per octave)