About the Rockford Fosgate Power T400-4
MEHSA is a Rockford Fosgate proprietary process that increases the heat transfer from the MOSFET devices to the heatsink. This allows the heat to escape more readily from the amplifier, so that the transistors stay cooler.
"Differential Input" circuitry helps eliminate any electronically induced noise or hum that could be picked up by the input cables, allowing only clean signals to enter the amplifier. You get more music with less heat and noise in a stylish package that's up to 40% smaller than previous models.
Product highlights:
- 4-channel car amplifier
- 60 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
- 200 watts RMS x 2 bridged output at 4 ohms
- CEA-2006 compliant
- Dynamic Thermal Management cooling system
- Differential Input circuitry eliminates hum
- variable high- and low-pass filters (50-500 Hz, 24 dB/octave)
- variable bass/treble boost (0-18 dB at 45 Hz, 0-12 dB at 12k Hz)
- optional remote bass/treble boost (available soon)
- Class-AB amplifier design
- MOSFET power and output stages
- preamp inputs
- 4-gauge power and ground leads and a 100-amp fuse recommended — wiring and hardware not included with amplifier
- no on-board fuses — when installing multiple amps in a system, an additional 100-amp in-line fuse between the distribution block and the amplifier is recommended
- 13-5/8"W x 2-1/4"H x 9-5/8"D
- warranty: 2 years
- MFR # T400-4
- Item # 575T4004P
What's in the box:
Rockford Fosgate Power T400-4 owner's manual
If you need assistance accessing this owner's manual, please give us a call.- 4-channel amplifier
- Four 1-1/2" Self-tapping screws
- Installation & Operation manual (English/ French/ Spanish/ German/ Italian)
- Punch Amplifier Performance Verification Certificate
- Optional PEQ remote EQ control information
More details on the Rockford Fosgate Power T400-4
Features & specs
| Performance | ||
|---|---|---|
| RMS Power Output (Watts x Channels) |
60 x 4 | |
| Peak Power Output (Watts x Channels) | N/A | |
| Power at 2 Ohms (Watts x Channels) | 100 x 4 | |
| Power at 1 Ohm (Watts x Channels) | --- | |
| Bridged Power (Watts x Channels) | 200 x 2 | |
| Minimum Impedance Bridged | 4 | |
| Minimum Impedance Unbridged | 2 | |
| Best Frequency Response | 20-20k Hz | |
| THD at Rated RMS Power | 0.1% | |
| Signal to Noise Ratio | 85 dB | |
| Input Voltage | 14.4v | |
| Features | ||
| Amplifier Class | AB | |
| Built-in DSP | No | |
| Remote Control | Optional | |
| Low-Pass Crossover Frequency | 50-500 Hz | |
| Low-Pass Slope (dB/octave) | 24 dB/octave | |
| High-Pass Crossover Frequency | 50-500 Hz | |
| High-Pass Slope (dB/octave) | 24 dB/octave | |
| Bass Boost | 0-18 dB | |
| Bass Boost Frequency | 45 Hz | |
| Fan Cooled | No | |
| Fuse Rating | 100 | |
| Speaker Level Inputs | No | |
| Preamp Outputs | No | |
| Width (inches) | 13-5/8 | |
| Height (inches) | 2-1/4 | |
| Depth (inches) | 9-5/8 | |
| Parts Warranty | 2 Years | |
| Labor Warranty | 2 Years | |
Product Research
Features
Cast Aluminum Heatsink: The cast aluminum heatsink dissipates heat generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over conventional extrusion heatsink designs.
Dynamic Thermal Management (DTM): DTM Evenly distributes excess heat across entire amplifier heatsink.
MEHSA³ (Maximum Efficiency Heat Sink Application-Third Generation): MEHSA is a Rockford Fosgate proprietary process that increases the heat transfer from the MOSFET devices to the heatsink. The multi-layer insulated metal MEHSA substrate operates with minimal thermal resistance, spreading heat both downward and outward to quickly dissipate heat from each device across the heatsink. This allows greater power output, enhanced thermal stability, and maximum reliability.
Trans-ANA (TRANSconductance Active Nodal Amplifier): Trans-ANA is a circuit that allows the audio signal to pass through the amplifier at low voltage. The signal is directly level-shifted to the fixed high voltage rails via a pair of drive transistors. Signal linearity is assured by an active node formed by the drive transistors at ultrasonic frequencies. The result is crystal clear sound quality.
NOMAD (NOn-Multiplying Advanced Decision): NOMAD is an intelligent protection circuit that uses an analog computer to make real time decisions regarding temperature, voltage, current and impedance. The unit is protected without limiting sound output unless needed.
TO-247 MOSFET: The Power T400-4 utilizes ultra high performance MOSFET output devices, giving the amplifier more power handling capability as well as lower thermal impedance for more reliable operation, even under the harshest load conditions.
DSM (Discrete Surface Mount): In the manufacturing process high speed robotics are used to place 1% tolerance parts and large board traces. DSM improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.
Power and Protection LEDs: The LEDs are located on top of the amplifier. A blue Power LED illuminates when the amplifier is turned on. A red Thermal LED illuminates if the amplifier overheats. The yellow Protect LED illuminates if a short circuit or too low an impedance is detected at the speaker connections. When any of the protection circuits engage, the amp automatically shuts down until the problem is corrected.
Controls
2/4-Channel Switch: The 2/4-channel switch changes the T400-4 between 4-channel and 2-channel input mode. When operating in the 2-channel mode, the amplifier produces 4-channels of output with connections to only the front channel inputs.
Internal Crossovers: The amplifier's internal front and rear crossovers have a 24 dB/octave slope. Each is independently selectable for high-pass, all-pass (full range), or low-pass operation and is variable from 50Hz to 500Hz.
Punch EQ: Punch EQ works along with the crossover switches. Like the crossovers, the front and rear EQs are independent of one another. When the crossover is set to low-pass, the Punch EQ acts as a variable bass boost; 0-18 dB at 45 Hz. When the crossover is set to high-pass, the Punch EQ acts as variable treble boost, 0-12 dB at 12 kHz. When the crossover is set to all-pass, both the bass and treble boost circuits are active.
Connections
Power Connections: The power and ground terminals are nickel-plated captive c-clamp wire connectors and will accommodate up to 4-gauge wire. An external 100-amp fuse (not included) must be installed on the power wire. The remote turn-on terminal will accept wire sizes of 12- to 24-gauge. A Phillips-head or slotted screwdriver (not supplied) is required to tighten/loosen the terminals.
Speaker Connections: The 4-channel nickel-plated clamp wire connectors will accept 8-gauge to 18-gauge wire. A Phillips-head or slotted screwdriver (not supplied) is required to tighten/loosen the terminals.
Remote Punch EQ (PEQ) Connection: An RJ-45 jack is provided for connecting an optional remote PEQ control (575ROCKPEQ, sold separately). If you use the remote PEQ, the rear Punch EQ control on the amp is disabled, and replaced by the remote. Note: Previous model Punch Bass and Para-Punch remotes will not work with this amp.
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Customer Q&A
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I've owned 2 of these. This amp is the cleanest "Highs" amp I've ever owned. The only thing close was the old Sound Stream reference amp. I'd choose this amp any day. Hands down..
Courtney from Roanoke Rapids, NC