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Rockford Fosgate P500-4

500W RMS Punch Series 4-Channel Amplifier (P5004)

Discontinued
|

We apologize

This item has been discontinued

  • Punch Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 60 watts x 4 chan.
    • 2 ohms: 125 watts x 2 chan.
    • Bridged, 4 ohms: 250 watts x 2 chan.
  • Dynamic Rockford Power Output: 726 watts
  • MOSFET power supply
  • Remote bass level input (remote level control sold separately)
  • LED power, thermal, and protect indicators
  • Tuned bass EQ (0 - 18 dB bass boost at 45 Hz)
  • On-board differential inputs eliminates noise picked up by the signal cable
  • DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature
  • Integrated Trans-ana technology simplifies the signal path of the amplifier allowing the signal to travel through the amplifier at a lower voltage. The result is greater reliability and exceptional sound quality
  • Featured custom designed TO-247 MOSFETs have 60% more metal tab area providing more power handling capacity, lower impedance and improved heat dissipation over traditional TO-220 MOSFETs found in most competitor's amps
  • Built in NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances
  • Cast aluminum heatsink allows for a high performance energy tolerance
  • Dynamic Thermal Management evenly distributes excess heat across entire amplifier heatsink
  • 4/2 channel operation for additional adjustments
  • Heavy duty aluminum alloy heatsink
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable high-pass filter (50-500 Hz, 12 dB/octave)
  • Variable low-pass filter (50-500 Hz, 12 dB/octave)
  • Frequency response: 20-20,000 Hz
  • CEA-2006 compliant amplifier
  • Dimensions: 13-1/64"L x 7-5/8"W x 2-1/4"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Sonic Electronix warranty

Product History:

Rockford Fosgate P500-4 thumbnail
(newest, current model)
Rockford Fosgate P450.4 thumbnail
(previous model, replaced by Rockford Fosgate P500-4)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

60 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

125 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

250 watts x 2 channels

Amplifier Specifications

Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

726 watts
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

500 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
8 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.05%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
2 pairs
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 500 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 500 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
105 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 18 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
100A x 1 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
83%
4 Star
17%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.5
Features
5.0
Design
5.0
Usability
4.7

928 Nut

Dallas, Tx

Overall
Durability
Value
Features
Design
Usability

Great sounding solid system Amp

March 8, 2012

I have been into car audio since I was 16. I am 40 now, and still have the car audio bug. I just purhcased a brand new Ford Ecoboost F-150 and this is a great truck. But the stock stereo was pathetic. I wanted a decent system for under a grand. So, I bought a JL Audio clean sweep, replacement 6x8 door speakers (pioneer in the front, Alpine in the back doors), and installed two very old school amps that I had kept from back in the day. A Kicker ZR240 for the highs, and a ZED Autotek 7150 "Bass Thrust" for my two kicker 6.5" comp VR woofers (already owned these as well) under the rear seat (supercrew) in a custom ported box. That put a 2 ohm stereo load on the kicker, and a 2 ohm mono load on the autotek which both are rated for. Everything sounded great, but then the Autotek stopped working (this amp is 20 years old after all). So I broke down and bought this 4 channel Fosgate amp, and for the time being, I am running my whole system on it. The four door speakers are bridged to the front channels, high pass set at about 160hz, and the 6.5" kickers are on the rear channel, bridged 2 ohms mono, also crossed LP at 160hz. The birth sheet states like 664 total watts RMS at a 2 ohm load. The sound difference with the new amp is night and day. I was blown away. The sound is extrememly crisp, clean, clear, and the lows are incredibly tight and with the bass boost dialed in, these little kicker 6.5's drop way down into the frequency range even though they won't win any SPL contests. I put them in a .6 cu ft ported box each, and they drop pretty low for 6.5's. I bought a single polk MM1040 DVC 10" woofer that I haven't built a box for yet, but that is next. I will add another 10 down the road. This amp is plenty loud enough for my music tastes now. My ears and hearing are a lot more sensitive to loud music after running around with four 12's and two 15's back in college. The built in crossovers works well and allows a smooth transition from my door speakers on the front channel to the two litte subs under the seat on the rear channel. The treble boost sounds best about half way up on my set up anyway. The bass boost is set to about 6/10 to 7/10 of the way up for a good rich deep bass output. I just purchased the bass gain remote so that I can control the rear channel bass boost on my rear subs. This little amp is worth every penny. Could not find it anywhere cheaper, and this is a brand new amp, not refurbished. I didn't think it would sound this much better, but it does.

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TROY

Lawton, OK

Overall
Durability
Value
Features
Design
Usability

First experience with RF gear.

November 11, 2011

This was my first time using rockford electronics in my car audio. Simply, this was by far the best decision I have made in car amps, period. Sound quality is awesome, features on this amp are fantastic, I have never had a better sound quality and range in any other amp like the P500-4 has given me. I get complimants all the time on how good my system sounds and what I am using, good speakers are essential but without the right amp, they are only so good. Rockford is on point and I only wish I had found this out years ago. You will be truly satisified with this amp, I know I am.

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DarkSasukE971j

Guadeloupe

Overall
Durability
Value
Features
Design
Usability

Power and Sound Quality....that's you'll get

March 20, 2013

Sound quality is awesome, my speakers (JBL P660c and P6560c) sound so crisp and clean and very loud. my system is active and the highs frequencies are more accurate and dynamic. Medium is great too if u set nicely ur equalizer, specially higher medium. I dont use anymore bass, cause my JBL dont need to play under 80-100hz : i hav rockford P3D212 ^^ The gain fixed at 1/3 in this amp and is good for my ears.

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Daryl

Enid, OK

Overall
Durability
Value
Features
Design
Usability

Awesome

January 19, 2013

Rockford Fosegate one of the best products on the market, in my opinion. very clean power from this amp...makes my speakers sound so crisp and clean and very loud....

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decible2003

Houston,TX

Overall
Durability
Value
Features
Design
Usability

AWESOME PRODUCT!!!! NIB AS DESCRIBED!!! AAA+++

June 8, 2011

I was very skeptical about buying electronics online. That being said, Sonic Electronix sent me the same amp. That I would have bought in the store.......NIB as described. This thing is running a set of 6 1/2" focal components (ie: also purchased from Sonic Electronix) as well as a pair of Focal 8" co-axials with power to spare......It is loud and clear.

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Patrick

Louisville, KY

Overall
Durability
Value
Features
Design
Usability

A little pricey, but a good product

March 30, 2011

Overall the amp has a clean sound and produces enough power for my tastes. CEA-2006 Compliant listing guarantees the advertised power rating. The size of the amp allows for installation in tight locations. The sound quality meets my expectations. Frequency and crossover adjustments exceeds what will be required for tuning. All in all I believe you will not be disappointed with this product but you may be able to find something just as good for a little less dollars. Pros: - Small footprint - Power output exceeds listed rating - Wiring terminals are top notch - Frequency and crossover adjustments Cons: - Amp adjustments are not easy to get to if amp is mounted Vertically - Price

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Accessory Tools and Products

Accessories added

NVX XKIT84 4-Channel 8-Gauge Wiring Kit

In case you didn't know, NVX has top notch wire and this kit has everything you need!

Your Price $69.99

Rockford Fosgate RFK8 Wiring Kit

Get a matching Fosgate wiring kit for your new Fosgate amplifier! Don't forget the RCA's!

Your Price $47.99

StreetWires ZN1K-08 8-Gauge Wiring Kit

Great wire for your awesome new amp! Don't forget the RCA's!

Your Price $16.95

Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

Your Price $7.99

Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

Your Price $11.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $21.99

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $44.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $99.95

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $29.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

The Install Bay IB-CAP1F

True 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $37.99

e2 ECAP1 by Scosche - Mid-Level 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $49.99

Rockford Fosgate RFC1D - Top of the Line 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $104.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

AutoSound 2000 CD-104

The ultimate amplifier level setting disc used for evaluation of audio components

Your Price $11.99

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

Product Summary

Manufacturer

Model Number

P500-4

UPC

780687329907

Weight

13.50lbs

Internal SKU

p500-4

Internal Product ID

22583

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Rockford Fosgate P500-4