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TM400x4 AD
Technical Highlights
- 400 W, 4-channel, Class AD technology, coated circuit board.
- Thermal sensors, top-mount controls, 2 heat sinks.
- Compatible with Harley-Davidson®, versatile audiovisual enhancement.
- More technical details
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TM400x4 AD by Rockford Fosgate
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.
- 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
- 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

