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Rockford Fosgate's Power Series Amplifiers

Rockford Fosgate has a well-deserved reputation for building high-quality mobile audio products. Their Power Series amps occupy the top of the amplifier food chain, with fine-tuned audio controls, extreme durability, and proprietary technologies that deliver stronger, more reliable performance than most other amplifiers on the market today.

High-grade internal components mean high-power output.

Even heat dispersal for longer life

Dynamic Thermal Management

Power Series amps use Rockford Fosgate's patented, award-winning "Dynamic Thermal Management," a 3-stage cooling system that uses forced air to dissipate heat evenly across the amp and out through the large heatsinks. This results in cooler internal components, higher efficiency, and lower distortion.

MEHSA cooling process

Maximum Efficiency Heat Sink Application increases heat transfer away from the transistors 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.

Extra-quiet inputs

Differential Inputs prevent noise from entering "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.

T500-1bd Power performance

The T500-1bd puts out 250 watts of continuous power to your single 4-ohm subwoofer, or 400 watts to a pair of subs. Either way, you can depend on clean, powerful sound from your Power Series amp.

T500-1bd connections

Product Highlights:

  • mono subwoofer amplifier
  • 250 watts RMS x 1 at 4 ohms (400 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • Dynamic Thermal Management cooling system
  • Differential Input circuitry eliminates hum
  • variable low-pass filter (35-250 Hz, 24 dB/octave)
  • selectable subsonic filter (28Hz, 12 dB/octave)
  • variable bass boost (0-18 dB at 45 Hz)
  • optional remote bass boost
  • Class-BD amplifier design
  • MOSFET power and output stages
  • preamp inputs and outputs
  • 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
  • 11-7/16"W x 2-3/16"H x 9"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Rockford Fosgate Power T500-1bd Reviews

Average Customer Review:

1 Review

Awsome Amp!

Written by: Anonymous from Lakeland, FL on August 31, 2009

I got this amp a couple months ago and this thing is amazing. I previously had a crunch p1500.1 for a while cause of money situation. That amp was twice the size and was SUPPOSED to put out three times as much as this amp. Not so much. As soon as i put this amp in and listened to it i could tell there was a huge difference. This amp hit harder, sounded cleaner, and is much more efficient. I had huge drops in my voltage with the crunch amp but not with this amp. Another issue was how hot the crunch amp would get. I can't get this rockford amp hot even at 1 ohm?! i banged some heavy bass for about 30 mins straight just to test it...barely warm. this amp is also conveniently small too i was actually very surprised how small it was. Rockford Fosgate is the way to go amp wise. nothing but good from them. Oh yeah by the way my birth sheet says 756 watts at 1ohm around 500 at 2 ohms and i can't remember 4ohms i think it was around 300... but yeah i have two kicker cvrs they each have 400 watts rms so this amp does a good job for them. The kickers are in a sealed box and i have the gain at about a quarter of the way up and ive got trunk shaking windshield flexing bass. I had to put 2 layers of Dynamat extreme on the trunk and rear deck of my car too help with the rattling i think my spoiler is starting to come loose. and no I don't have a 30 year car that rattles i have a 2008 mid-size sedan. got a power 400-4 it's amazing also.



Hands-on research

What's in the box?

Download owner's manual

  • Mono 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

Product Research



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.

TO-247 MOSFET: The Power T500-1bd 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.

Low Impedance: The T500-1bd is 1-ohm stable and outputs 500 watts RMS into a 1 ohm load.

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.


Internal Crossover: The amplifier's internal crossover has a 24 dB/octave slope. The crossover point is variable from 35Hz to 250Hz.

Punch EQ: Punch EQ acts as a variable bass boost; 0-18 dB at 45 Hz.

Infrasonic Filter: The infrasonic high pass filter is designed to prevent frequencies below the audible range from being applied to the subwoofer from the amplifier, consequently improving subwoofer performance and power handling, particularly in vented enclosures. The crossover point is fixed at 28 Hz, the slope is 12 dB/octave, and the filter can be turned on or off to suit your preference.


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 nickel-plated clamp wire connectors will accept wire sizes of 8- to 18-gauge. A Phillips-head or slotted screwdriver (not supplied) is required to tighten/loosen the terminals.

Note: Although there are two sets of speaker terminals, the amplifier still produces a monaural signal. The A and B speaker outputs are internally wired in parallel.

Line Input/Output: The RCA jacks are nickel plated to prevent corrosion. The full range line output allows easily adding another amp without running a second set of cables.

Remote Punch EQ (PEQ) Connection: An RJ-45 jack is provided for connecting an optional remote PEQ control (item number 575ROCKPEQ). If you use the remote PEQ, the 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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.