Rockford Fosgate TM400x4 AD

The Rockford Fosgate TM400x4 AD is a 4-Channel Amplifier with proprietary Class-AD technology, 4/2-ohm multi-impedance constant power, and 4-ohm bridging. Differential inputs with automatic turn-on function, a 2/4-channel input switch, top-mounted controls, and C.L.E.A.N. clip detection LEDs are integrated. Dual fan cooling, two extruded heat sinks, real-time thermal sensing, discrete SMD construction, and a two-component marine-grade epoxy coating on the circuit boards are present. High-pass and low-pass filters 50–250 Hz at 12 dB/octave (Butterworth), all-pass, as well as tone controls for treble (0 to +14 dB at 12.5 kHz) and bass (0 to +18 dB at 45 Hz) are included. The amplifier operates with a frequency response of 20 Hz to 20 kHz (+/-1 dB) and an input sensitivity of 150 mV to 12 V at 9–16 VDC operating voltage; compatible with all Harley-Davidson models. Features 4-Channel Amplifier Proprietary Class-AD technology (Rockford Fosgate) 4/2-ohm multi-impedance constant power 4-ohm bridgeable Differential inputs with automatic turn-on function (High-Level) 2/4-channel input switch Top-mounted controls C.L.E.A.N. input/output clip LEDs Dual fan cooling and two extruded heat sinks Real-time thermal sensing Discrete surface mount technology (SMD) Two-component marine-grade epoxy coating on circuit boards Compatible with all Harley-Davidson models Technical Specifications Number of channels: 4 Total rated power: 400 Watts RMS power: 100 Watts x 4 @ 4 ohms RMS power: 100 Watts x 4 @ 2 ohms RMS power bridged: 200 Watts x 2 @ 4 ohms Dynamic power: 128 Watts x 4 @ 4 ohms Dynamic power: 152 Watts x 4 @ 2 ohms Dynamic power bridged: 290 Watts x 2 @ 4 ohms Bridgeable: Yes Frequency response: 20 Hz–20 kHz (+/-1 dB) Input sensitivity: 150 mV–12 V Circuit topology: Class AD Efficiency (average): >75% THD+Noise: 4 ohms <1.0 %, 2 ohms <1.0 % Signal input front: High/Low-Level, 4-pin harness Signal input rear: High/Low-Level, 4-pin harness Front connections: Left (+), Right (-) Rear terminals: Left (+), Right (-) Treble tone control: 0 to +14 dB @ 12.5 kHz Bass tone control: 0 to +18 dB @ 45 Hz High-pass Crossover: 50–250 Hz @ 12 dB/octave Butterworth Low-pass Crossover: 50–250 Hz @ 12 dB/octave Butterworth All-Pass: Yes Optical indicators: Power blue, Protect red, Input clip red, Output clip blue/purple/red LED color legend: Blue <0.5 % THD; Purple 1 % THD; Red 10 %+ THD Power input connection: Removable compression terminal Power/Ground connection: 10 mm² Speaker wire gauge: 1.5 mm² Cooling: Dual fan cooled Heat sink: Extruded aluminum Operating voltage: 9–16 VDC Recommended fuse (not included): 60 A Average current draw (13.8 V, music): 28 A Maximum current draw (13.8 V, sine): 55 A Recommended alternator: 75 A Dimensions (H x W x D): 4.1 x 10.8 x 21.1 cm Shipping weight: 1.54 kg Replacement: 1040-57997