This compact multi-channel powerhouse employs our Single-Cycle Control switching design and R.I.P.S. technology to deliver 150 W x 4 or 300 W x 2. Tight power supply regulation keeps distortion down and maximizes sound quality. When using the HD750/1 or HD1200/1 to drive a subwoofer system, the HD600/4 is the ideal satellite amplifier, delivering huge dynamics with pristine resolution. From a pure sound quality perspective, we invite you to compare the real-world, in-car performance of this amplifier to any other amplifier on the market, of any type, at any price. It can also be deployed on its own as a very capable 3-channel system amplifier with 150 W x 2 to the satellites and 300 W x 1 to a subwoofer system. This amplifier features a brushed aluminum finish with black powder-coated cast alloy heat sinks and bottom panel. A black powder-coated, gasketed cover is also provided to protect the controls. Single Cycle Control™ High-Fidelity, full-range Class D is a reality. R.I.P.S. – Regulated, Intelligent Power Supply The remarkable R.I.P.S. System ensures consistent power delivery over a wide range of battery voltages and load impedances. Advanced Rollback Protection JL Audio's exclusive Advanced Rollback Protection circuit monitors the amplifier's thermal condition and adjusts amplifier operation to eliminate annoying amplifier shut-down events. RealSink™ Vertical, cast alloy fins effectively dissipate heat, without resorting to noisy fan-cooling. HD Mounting Options Two mounting options plus a space-saving stacking feature ease installation. Differential-Balanced Inputs JL Audio’s Differential-Balanced Inputs are engineered to combat induced cable noise, which is a common problem in car and marine audio installations. This technology allows for the use of conventional RCA cables, while delivering many of the benefits of a true balanced connection and accepting a wide range of input signal levels. | Number of Channels 4 Class D Peak Power Rating (Watts) RMS Power Rating (Watts x Channels) - 4 Ohms 150 x 4 RMS Power Rating (Watts x Channels) - 2 Ohms 150 x 4 RMS Power Rating (Watts x Channels) - 1.5 Ohm 150 x 4 RMS Power Rating - Bridged 3-8 Ohms 300 x 2 Minimum Impedance Unbridged (Ohms) 1.5 Minimum Impedance Bridged (Ohms) 3 THD at Rated RMS Power 0.03% Bulit-in Crossover - Low Pass Yes Built-in Crossover - High Pass Yes High Pass Crossover Frequency (Hz) 50-500hz Low Pass Crossover Frequency (Hz) 50-500hz Signal-to-Noise Ratio 110dB Bass Boost 0-15dB Bass Remote Included No Fuse Rating 50A CEA-2006 Compliant Yes Maximum Power Wire Gauge Size 4 Gauge Warranty 1 Year
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