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Rockford Fosgate R500-1D

500W RMS PRIME Series Monoblock Amplifier

Discontinued
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This item has been discontinued

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Rockford Fosgate R500X1D

OUR PRICE: $149.95

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  • PRIME Series Single-Channel Monoblock Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 250 watts x 1 chan.
    • 2 ohms: 500 watts x 1 chan.
  • MOSFET Power supply
  • Power and protection LED indicators
  • Tuned Bass EQ (0-12 dB bass boost at 45 Hz)
  • Single-channel operation
  • 1 Pair of Preamp RCA outputs
  • Heavy duty extruded aluminum alloy heatsink for optimal heat dissipation
  • RCA level inputs
  • Screw terminals
  • Variable low-pass filter (40-130 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-250 Hz
  • Dimensions: 7-2/3"L x 7-2/3"W x 2-1/2"H
  • 1-year SonicElectronix.com warranty

Product History:

Rockford Fosgate R500X1D thumbnail
(newest, current model)
Rockford Fosgate R500-1D thumbnail
(previous model, replaced by Rockford Fosgate R500X1D)
Rockford Fosgate R500-1 thumbnail
(previous model, replaced by Rockford Fosgate R500-1D)

Power Specifications - Subwoofer Channel

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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
250 watts x 1 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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
500 watts x 1 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
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.

D
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.
1 - Mono
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.
4 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.
Not Bridgeable
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.
1%
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.
1 pair
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)
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 - 250 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.
80 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 - 12 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.
Yes
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.
25A x 2 
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
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.

Specials with this Item

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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
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
5.0
Value
5.0
Features
4.8
Design
4.6
Usability
5.0

RJ

Conroe, Texas

Overall
Durability
Value
Features
Design
Usability

Great Amp

March 6, 2013

Works great, easy to use, bought for a great price, free shipping is the best

0 of 0 found this helpful

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KC

Humble, TX

Overall
Durability
Value
Features
Design
Usability

A solid amp

February 21, 2013

Bought this to power my 2 alpine type e 10s and man am i happy. Makes the subs bump hard in only a 1.1 cubic foot box for both. Would recommend this amp to any one looking for a reliable amp. Came in at 546 rms.

0 of 0 found this helpful

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Matthew

Lakeland Fl

Overall
Durability
Value
Features
Design
Usability

Awesome

December 19, 2012

Using this with 2 JL Audio w3s (the 6.5" sub) subs rated for 125RMS and this puts out just enough to make them hit hard for how small they are. Tiny size makes it fit anywhere, could use some better terminals tho

0 of 0 found this helpful

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Matthew

Jensen Beach, FL

Overall
Durability
Value
Features
Design
Usability

I Really Like It

June 18, 2012

When I first pulled this amp out its packaging, I had to laugh a little. It's got a footprint that's only a bit bigger than a CD case. It weighs a couple of pounds at most, and has a very understated look. The birth sheet states 558 watts RMS @ 2ohms. I hooked it up to an MTX RTS12-04 in a factory spec box. I used 8-gauge power wire from RF and 10 gauge speaker wire. I put the box in the trunk of my Honda Accord with the port and cone facing into the cabin - back seats folded down. Let me tell you, this little amp does some serious work! My roof/trunk/door panels all flex like crazy. I can see my shirt and the plastic bags on my floor vibrating on the low notes. I can even feel my hair shaking and smell my poor sub's voice coil. Mind you, it's still only wired at 4 ohms! I can't wait to hook it up to a good 15 at 2 ohms. I think this amp is perfect for people wanting loud bass without having to modify their car's electrical system. My car came stock with a 130 amp alternator, so this little guy won't even come close to over-drawing my charging system. Also, it can't draw more than about 50 amps, so you can use 8-gauge power wire as long as it's high quality. You have to love the efficiency of a class-D amp. It barely gets warm to the touch after blasting for 20 minutes at full volume. If there is a better amp out there for the money, I haven't heard of it. Having owned it for only a few days, I have yet to test its durability. However, Rockford Fosgate is well known for the quality of their products. The bass remote knob is an awesome feature that you must buy separately with most other amps. The low-pass filter and bass boost controls work well and aren't obtrusive. The heat sink design is nice and clean, which is great because I hate bright flashy colors. Also, the blue power-on LED lights up my trunk at night, which is cool. All in all, this amp is better than expected and I could not be happier. If you want loud bass without a big amp, this is it.

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tha browncow

OHIO 45358

Overall
Durability
Value
Features
Design
Usability

amazing output for its size

May 26, 2012

I'm running this in a 99 olds intrigue (stock electric) with a hypnotic 12" zen in a 3.25 cuft box tuned at 34 hz and its nuts. I was disappointed when I seen I bought the smaller r500.1d instead of the older r500.1 which is roughly 9" wider. Regardless this little guy slams, it's definitely worth the price I recommend to all. Amp came with a birth sheet stating 560 rms @ 2 ohms Look/design received a 4 because of the spade terminals.

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Product Summary

Manufacturer

Model Number

R500-1D

UPC

780687340711

Weight

5.00lbs

Internal SKU

r5001d

Internal Product ID

43418

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 R500-1D