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Rockford Fosgate TM400X4adPower 400 Watt Class-ad 4-Channel Element Ready™ Amplifier
The TM400X4ad is a compact 400 Watt 4-channel amplifier using Rockford Fosgate’s high-efficiency Class‑AD topology and Constant Power technology to maximize output, sound quality and efficiency.
Highlights
- 2-Year Warranty
- 2/4 channel input switch
- Differential inputs with high level auto turn-on feature
- Remote-Out feature when using high level inputs
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 100 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 128 Watts x 4 @ 4-Ohm 152 Watts x 4 @ 2-Ohm 290 Watts x 2 @ 4-Ohm Bridged
- Bridgeable
- Yes Front Terminals: Left (+) Right (-) Rear Terminals: Left (+) Right (-)
- Frequency Response
- 20Hz-20kHz +/-1dB
- Input Sensitivity
- 150 mV to 12 V
- Circuit Topology Class
- Class AD
Key specs
Full specs- Number of Channels
- 4
- Total Power (Sum of Rated Power)
- 400 Watts
- Rated Power (RMS Continuous Power)
- 100 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 128 Watts x 4 @ 4-Ohm 152 Watts x 4 @ 2-Ohm 290 Watts x 2 @ 4-Ohm Bridged
Highlights
Overview- 2-Year Warranty
- 2/4 channel input switch
- Differential inputs with high level auto turn-on feature
Overview
The TM400X4ad is a compact 400 Watt 4-channel amplifier using Rockford Fosgate’s high-efficiency Class‑AD topology and Constant Power technology to maximize output, sound quality and efficiency.
Best for
- Marine and motorsport audio installations where moisture resistance is needed
- Compact or space-limited installations requiring a full-range 4-channel amp
- Setups that benefit from flexible input options and on‑top control access
Key points
- 400 Watt total power in an ultra-compact 4-channel package
- Class‑AD topology with Constant Power for consistent output at 4Ω and 2Ω
- Element Ready design with conformal-coated PC boards for improved environmental resistance
- Top-mounted C.L.E.A.N. input/output clip detection, built-in crossover and Punch EQ
- High- and low-level inputs with differential input noise rejection and auto turn-on
- Remote-out trigger available when using high-level inputs
Fit and use
Top-mounted controls provide easy access to gain, crossover and C.L.E.A.N. settings. Use low- or high-level inputs depending on source equipment; differential inputs help reduce incoming noise. The amp’s compact footprint and Element Ready construction suit installations exposed to moisture or vibration common in marine and motorsport environments.
What to know
The amplifier includes active thermal protection (dual fans and real-time monitoring) to manage heat during high output. Element Ready and conformal coating increase resilience to moisture and contaminants. Confirm the amplifier’s electrical and physical specifications match your system requirements before purchase.
Highlights
Key features
- 2-Year Warranty
- 2/4 channel input switch
- Differential inputs with high level auto turn-on feature
- Remote-Out feature when using high level inputs
- 4 Ohm bridged capable
- Dual fan cooled
- Real time thermal sensing
- Dual extruded heat sinks
- Rockford Fosgate proprietary Class AD technology
- 4/2 Ohm muti-impedance Constant Power
- Discrete surface mount technology
- 8 AWG power/ground connector w/ upgraded RCA connectors
More info
Manufacturer details
The TM400X4ad is a powerful and compact 400 Watt 4-channel amplifier. The amplifier features our proprietary high efficiency Class-ad topology for maximum power, sound quality and efficiency in full-range amplifier. It also integrates our patented Constant Power technology which results in up to 25% more output power. Top mounted controls feature our patented C.L.E.A.N. circuit to easily set your gains, integrated low-pass crossover, and our famous Punch EQ.
The amplifier also features high and low level inputs combined with our differential inputs to eliminate incoming noise. It can also provide a remote-out trigger when using high level inputs. Dual fan cooling, real time thermal monitoring and dual extruded heat sinks maintain heat dissipation even at high outputs keep the amp cool.
In addition to the conformal coated pc boards, the Element Ready™ design ads protection against water, dust and UV rays, making it great for multiple applications where it could be exposed to harsh outdoor environment.
Additional details
The Power TM400X4ad 400 Watt 4-channel ultra-compact, amplifier is built on Rockford Fosgate’s proprietary Class-AD technology, featuring Constant Power to produce the same output at both 4-Ohm and 2-Ohm impedances. Flexible vehicle integration enabled through low-level and high-level inputs with auto turn-on. Top mounted controls allow easy access to built-in crossover and C.L.E.A.N. input/output clip detection circuits. The 3-stage thermal lock extrusion with dual fan forced induction keeps everything cool while real-time thermal/protection schemes safeguard the amplifier.
Technologies
3-Stage Airflow
3-stage airflow method effectively exhausts heat and ensures your amplifier runs cooler for optimum performance.
CE Compliant
This product fulfills all essential safety and environmental requirements as defined in the European Directives
Engineered In The USA
[av• uh•tahr -noun] 1. an embodiment or personification, as of a principle, attitude, or view of life 2. a
DSM
DSM - An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance
CTA-2006 Compliant
Power ratings on Rockford Fosgate amplifiers conform to CTA-2006 industry standards. These guidelines mean your
Patent: 7,994,857
Constant Power
Music and speakers have a dynamic relationship. As the frequency of music varies, so does the impedance of the
Class-AD
Rockford Fosgate's AD topology brings out high efficiency bd amplifier design to a full range application.
Patent: 8,712,066
C.L.E.A.N. Technology
Time and sophisticated test equipment have been replaced, with Rockford’s integrated level setting technology
Element Ready™ | Amps
All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion &
Specs
Specifications
29
| Number of Channels | 4 |
| Total Power (Sum of Rated Power) | 400 Watts |
| Rated Power (RMS Continuous Power) | 100 Watts x 4 @ 4-Ohm 100 Watts x 4 @ 2-Ohm 200 Watts x 2 @ 4-Ohm Bridged |
| Dynamic Power (PVC/PowerCube®) | 128 Watts x 4 @ 4-Ohm 152 Watts x 4 @ 2-Ohm 290 Watts x 2 @ 4-Ohm Bridged |
| Bridgeable | Yes Front Terminals: Left (+) Right (-) Rear Terminals: Left (+) Right (-) |
| Frequency Response | 20Hz-20kHz +/-1dB |
| Input Sensitivity | 150 mV to 12 V |
| Circuit Topology Class | Class AD |
| Efficiency (average) | >75% |
| Total Harmonic Distortion (THD+Noise) | 4-Ohm: <1.0% 2-Ohm: <1.0% |
| Signal Input | Front High/Low Level Input: 4-Pin harness Rear High/Low Level Input: 4-Pin harness |
| Signal Output | — |
| Tone Controls | Treble: 0 to +14 dB @ 12.5 kHz Bass: 0 to +18 dB @ 45 Hz |
| Crossover Controls | High-Pass: 50Hz-250Hz @ 12dB/Octave Butterworth Low-Pass: 50Hz-250Hz @ 12dB/Octave Butterworth All-Pass: Yes |
| Remote Controls | — |
| Visual Indicators | Power: Blue LED Protect: Red LED Input Clip: Red LED3 Output Clip: Blue/Violet/Red LED1,2,3 LED Color Legend: 1BLUE: <0.5% THD 2VIOLET: 1% THD 3RED: 10%+ THD |
| Power Wire Gauge | 8 AWG |
| Power Input Connector | Detachable Compression Terminal Replacement 1040-57997 |
| Speaker Wire Gauge | 16 AWG |
| Speaker Output Connector | Front: 4-Pin Harness Rear: 4-Pin Harness |
| Cooling | Dual Fan Cooled |
| Heatsink | Extruded Aluminum |
| Operating Voltage | 9 - 16 VDC |
| Recommended Fuse (not included) | 60 A |
| Average Current Draw (13.8V Music) | 28 A |
| Max. Current Draw (13.8V Sinewave) | 55 A |
| Suggested Alternator | 75 A |
| Dimensions (H x W x D) | 1.6 x 4.3 x 8.3 (in.) 4.1 x 10.8 x 21.1 (cm) |
| Shipping Weight | 3.4 Lbs. (1.54 Kg.) |
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Installation resources
Wiring diagrams
10
Wiring Diagram #1
Source: Rockford Fosgate
Wiring Diagram #2
Source: Rockford Fosgate
Wiring Diagram #3
Source: Rockford Fosgate
Wiring Diagram #4
Source: Rockford Fosgate
Wiring Diagram #5
Source: Rockford Fosgate
Wiring Diagram #6
Source: Rockford Fosgate
Wiring Diagram #7
Source: Rockford Fosgate
Wiring Diagram #8
Source: Rockford Fosgate
Wiring Diagram #9
Source: Rockford Fosgate
Support
Return Authorization
If you bought this product from Onkar Electronics, use the Contact Us page on the Onkar Electronics website and we will help with return authorization and warranty support. If you purchased it from another dealer, contact that authorized dealer first for return assistance.
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