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Rockford Fosgate Punch P500X1bd Mono subwoofer amplifier — 500 watts RMS x 1 at 1 ohm

Item # 575P500X1B

Rockford Fosgate's Punch P500X1bd subwoofer amp can produce up to 500 watts RMS, giving you plenty of clean power...

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Rockford Fosgate's Punch P500X1bd subwoofer amp can produce up to 500 watts RMS, giving you plenty of clean power...

8 questions - 15 answers

Item # 575P500X1B

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$333.44

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About the Rockford Fosgate Punch P500X1bd

Buck Pomerantz

Big power for your sub or sub system

Rockford Fosgate's Punch P500X1bd subwoofer amp can produce up to 500 watts RMS, giving you plenty of clean power for your rhythm track. And the P500X1bd can drive a 1-ohm load, so you can power multiple subs without any trouble. A low-pass filter keeps the high notes away from your sub, while a subsonic filter helps you rein in runaway boom. The Punch bass boost lets you add some of that boom back into the mix when it's needed.

Big power for your sub or sub system

Rockford Fosgate's Punch P500X1bd subwoofer amp can produce up to 500 watts RMS, giving you plenty of clean power for your rhythm track. And the P500X1bd can drive a 1-ohm load, so you can power multiple subs without any trouble. A low-pass filter keeps the high notes away from your sub, while a subsonic filter helps you rein in runaway boom. The Punch bass boost lets you add some of that boom back into the mix when it's needed.

Easy to set for optimum performance

P300X2 control panel shown as example

P300X2 control panel shown as example

Once again, Rockford Fosgate steps away from the crowd with their C.L.E.A.N. technology (Calibrated Level Eliminates Audible Noise) — a setup system that ensures your music will sound as clean and powerful as possible. It works like this: first download the setup tones from Rockford Fosgate, then play the tone, adjust the receiver volume until a red clip light on the amp goes out, then turn the amp gain up until a blue light comes on. It's that simple — your amplifier will be perfectly set to match your receiver's output. When your receiver reaches maximum clean volume, you'll get maximum clean power from your Power amp. At quiet listening levels, you'll hear less background noise and more of your music.

Keeps an eye on things while playing

If that blue light turns solid red while you're playing music, the amp's telling you that your source is distorting and you should turn it down, or risk damage to your gear. The optional PLC2 remote level control also doubles as a clip indicator, so you can see from the front seat if your music's clipping. The amp's built-in computer keeps tabs on the output current, ensuring that plunging speaker impedances (they change during play) or even a short circuit won't hurt anything.

Maintaining coolness raises efficiency and lowers distortion

Rockford Fosgate's Dynamic Thermal Management system uses forced air to dissipate heat evenly across the amp and out through the high-mass heatsink, efficiently drawing heat away from vital internal parts. Their proprietary MEHSA cooling process maximizes the heat transfer from the MOSFET devices to the heatsink, allowing the heat to escape more readily, so the transistors stay cooler and work better.

Rockford Fosgate P500X1bd

P500X1bd connection panel with input clip light

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.

READ LESS

Product highlights:

  • mono subwoofer amplifier
  • 150 watts RMS x 1 at 4 ohms (300 watts RMS x 1 at 2 ohms)
  • 500 watts RMS x 1 at 1 ohm
  • CEA-2006 compliant
  • Features:
  • variable low-pass filter filter (50-250 Hz, 12 dB/octave)
  • selectable subsonic filter (28Hz, 12 dB/octave)
  • variable PEQ2 bass boost (0-18 dB at 45 Hz)
  • C.L.E.A.N. gain setup system includes clip lights and link to Rockford Fosgate's setup tones
  • Class-BD amplifier design
  • frequency response: 20-250 Hz
  • Dynamic Thermal Management and MEHSA MOSFET cooling systems
  • MOSFET power and output stages
  • preamp inputs and outputs
  • speaker-level inputs (speaker wire to RCA adapter required)
  • signal-sensing turn-on with speaker-level inputs eliminate need for remote turn-on lead
More Info:
  • optional PLC2 wired remote level control with clip light available
  • 4-gauge power and ground leads and an 80-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 80-amp in-line fuse between the distribution block and the amplifier is recommended
  • 11-1/8"W x 2-7/16"H x 8-13/16"D
  • warranty: 1 year
  • MFR # P500X1BD

What's in the box:

  • Mono subwoofer amplifier
  • Four 1-1/2" Self-tapping screws
  • 2.5mm Allen wrench
  • Quick setup instructions
  • Certificate of Performance

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

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Customer reviews for Rockford Fosgate Punch P500X1bd

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More details on the Rockford Fosgate Punch P500X1bd

Mark G.

Product Research

Features
Controls
Connections

Features

Class bd Design: Rockford Fosgate bd topology is a patented design, integrating a technology that is more efficient than typical class A/B amps, and has lower distortion than typical class D designs. Punch bd amplifiers are 75-80% efficient, while class A/B amps are typically less than 50% efficient. This means, more power from your amplifier with less drain on your vehicles electrical and charging system.

CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured with 1% or less Total Harmonic Distortion plus noise (THD+N) over a frequency range of 20 Hz to 20 kHz (for full range amplifiers). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4Ω. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. Using CEA-2006 criteria, the Rockford Fosgate P500X1bd is rated as follows:

  • Power Output:
    • 4Ω: 150 watts x 1-channel
    • 2Ω: 300 watts x 1-channel
    • 1Ω: 500 watts x 1-channel
  • Signal to Noise Ratio: 80 dBA (100 dB at rated power)

Cast Aluminum Heatsink: The cast aluminum heatsink dissipates heat generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% cooling improvement over conventional extrusion heatsink designs.

MEHSA³ (Maximum Efficiency Heat Sink Application-3rd 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.

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 amplifier is protected without limiting sound output unless needed.

DSM (Discrete Surface Mount): High speed robotics are used in the manufacturing process 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.

CLEAN Set-Up: Rockford's integrated level setting technology, CLEAN (Calibrated Level Eliminates Audible Noise), replaces sophisticated test equipment with input/output clip LEDs, allowing you to match the source unit's output to the amp's gain, and optimize the amp's output. The input clip indicator works in conjunction with the audio source volume, illuminating red when the source reaches it's clipping point. The output clip indicator works in conjunction with the input level dial on the amp, illuminating the appropriate color depending on the audio content used for the setup.

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.

Balanced Differential Inputs: Differential inputs eliminate noise picked up by signal cables by measuring the voltage of both the (+) and (-) input signal, then subtracting the voltage common to both conductors (noise), resulting in only the clean signal entering the amplifier.

Infrasonic Filter: The infrasonic filter is fixed at 28 Hz with a slope of 12dB/octave. This high-pass filter is designed to prevent frequencies below the audio range from being applied to the subwoofer, or reproduced by the amplifier. This improves your subwoofer performance and power handling, particularly in vented enclosures.

Controls

Input Level: To accommodate the varying range of signal levels from today's factory and aftermarket radios, the input level is adjustable from 150mV to 12V.

Crossover: The amplifier's internal low-pass crossover has a 12 dB/octave slope. The crossover point is variable from 50 Hz to 250 Hz. The crossover cannot be bypassed (it's not a full range amp).

Punch EQ: The Punch EQ bass boost circuit is continuously variable from 0 to +18 dB, centered at 45 Hz.

Remote Punch Level: When activated, this switch allows the use of a optional remote Punch Level Controller (PLC2).

Infrasonic Filter: A switch allows you to turn the infrasonic filter off if you prefer.

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 80-amp fuse (not included) must be installed on the power wire. The remote turn-on terminal will accept up to 12-gauge wire. A Phillips or flat-head screwdriver (not supplied) is required to tighten/loosen the terminals.

Speaker Connections: The two speaker outputs are internally wired in parallel, making it easy to connect two subwoofers. The speaker terminals are also nickel-plated captive c-clamps and will accept up to 8-gauge wire. A Phillips or flat-head screwdriver (not supplied) is required to tighten/loosen the terminals.

Signal Input: The RCA inputs will accept either a line-level or speaker-level input. A speaker-level signal can be connected using a Speaker Wire to RCA adapter (sold separately). When using a speaker-level input signal, the auto turn-on feature is active and the remote turn-on terminal becomes a 12 volt output to turn on/off up to two additional amplifiers or other components.

Line Level Output: The amplifier has a pair of RCA line level pass-thru outputs to feed another amplifier. The pass-thru output is passive (the same signal present at the amp's input) and the amp's crossover has no effect on the signal.

Punch Level Control (PLC): An RJ-45 jack is provided for connecting an optional wired remote PLC2 (item number 575PLC2, sold separately), allowing remote control of the output level of the amplifier. A second RJ-45 jack is the PLC output, used to daisy-chain additional amplifiers controlled by a single remote.

Note: Previous model PEQ, Punch Bass, and Para-Punch remotes will not work with this amp.

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Customer Q&A

8 questions already asked

Q
what wires would i need for this and 2 subs?
mason  Jun 26, 2023
1 answer
A
Greetings Mason, and thank you for your question. You will need an amp wiring kit. 4 gauge is recommended. Some come with RCA cables (if you have an aftermarket stereo), some kits do not come with RCAs. If your using a factory radio, you would have to tap into a left and right speaker for the signal, then you would, need RCA to speaker wire adapters, or a line output converter. From the amp to the sub, I would recommend 12 gauge speaker wire. You can give our advisors a call at 800-324-9695 and have them set you up for everything you will need.
hogan  Jun 26, 2023 (Staff)
Q
I Have the P500x1bd what do I set the hz to for a 12" P3 ported box?
clay  Apr 22, 2023
1 answer
A
There is some personal preference to the crossover settings on your subwoofer, Clay. If you have your gain adjusted properly and bass boost off (with remote knob at 0 if you are using), I would start with the rotary knob on the P500x1bd right between the 80/200 marks. This would be roughly 125 HZ or so and a great place to start tuning. Depending on your music style and personal preferences you can slowly turn the knob towards the 80 mark (or even lower if you like the sound). Keep in mind you also want to have any settings on your head unit or factory radio for bass adjustment set to 0 when tuning as well. I hope this helps!
bo  Apr 23, 2023 (Staff)
Q
Can I use a 8 gauge power line?
bill  Aug 20, 2022
1 answer
A
Greetings Bill, and thank you for your question. 4 gauge is recommended for the P500X1bd amplifier.
hogan  Aug 20, 2022 (Staff)
Q
is there a plug that connect the power,negative and the remote wire to a plug to make it easier to connect to the amp?
joseph g  Mar 13, 2022
2 answers
A
No the terminals on amp are mechanical lugs. Power wire needs to be pretty big
jared  Mar 13, 2022
A
The power connection + hot - ground. Are standard with most amps the only plug is with the bass control I use rockfordfosgate 4 ga wire. Amp never over heats. And I abuse it Easy to install ??
johnny  Mar 13, 2022
Q
Where is the heat sink located on the P500x1bd amp so I make sure its got its 1 inch clearence for proper air flow?
tim  Oct 18, 2021
4 answers
A
I believe the best way to answer this is , the casing of the amp would be considered the heat sink. Therefore having at least 1 inch breathing room is necessary. Standard with most amps. I run in tight quarters. Have a pair in series mounted to cab of truck. No heating issues ever. I'm a very avid listener to loud music! Beat etc.FYI. All Fosgate equipment come a build sheet , that describes testing factors. Fosgate always exceeds what is displayed.
brian  Oct 19, 2021
A
Both sides with the visible holes are the heat sinks
wayne  Oct 18, 2021
A
The fins on the left and right of the main body. If they are covered up air will not be able to pass along them to pull the heat from the amp.
david  Oct 18, 2021
A
On the lower left side and lower right side mine is in a box no vent I crank it never gets hot allways runs cool all the time
johnny  Oct 18, 2021
Q
What ohm speakers should I get 2ohm or 4 ohm for this amp?
chris  May 14, 2021
2 answers
A
There are a lot of factors that need to be considered when choosing the ohm of the subwoofer/subwoofers to get to use with an amp like this one because it supports 4, 2, and 1 ohm loads. I recommend contacting an advisor by calling 1-800-324-9695 to discuss your plans and goals to get a personal recommendation
jason  May 30, 2021 (Staff)
A
This amp is a mono amp that is one ohm stable. It's really made for one really good speaker at one ohm. If you want it to push multiple subs I would need to know what size and what their power rating is. Having said that if you're wanting to push multiple large subs at 2 or 4 ohms I would probably go with a different amp.
marc  May 29, 2021
Q
Will this amp work with 2 skar svr 12 inch subs?
chris  May 14, 2021
1 answer
A
It will run them ok, but not to their limits. Mine is running 2 12" P2s pretty hard. The average RMS of the Punch 500x1 is closer to 750 watts and peaks around 1000 to 1200 watts. The Punch 1000x1 would be the ideal fit. Always look at RMS watts over peak and try to match those.
matthew  May 14, 2021
Q
is this a good amp for my p3 10" ??
matthew  May 10, 2021
3 answers
A
Yes great amp I have a p 3 12 sounds great would recommend
johnny  May 13, 2021
A
I have this amp running two 12 inch Infinity Subs and it slaps! I don't loose my bottom end at all. Dope a$& amp! ??
brian  May 11, 2021
A
Oh yeah....i use it for a p3 12" and it slams...runs super cool
wayne  May 10, 2021
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