Rockford Fosgate PS-8 Punch Powered Subwoofer Enclosure

300W 8" Punch Powered Under-Seat Loaded Subwoofer Enclosure with High & Low Level Input for OEM or Aftermarket Integration

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Rockford Fosgate Audio Store

Hidden, But Never Unheard

The Punch PS-8 is an self-contained amplified subwoofer system featuring a single Punch 8" driver in a sealed enclosure and a built-in 150 watt amplifier. Its main objective is to be completely hidden away within installations where space comes at a premium, but still provide modest sub output. At just under 3-1/2" tall, the PS-8 is perfect for Muscle Cars, Hot-Rods, Single Cab Trucks, and the like. The system is all-inclusive, so you only need to run power, ground and a signal from the source, then follow that up by sliding the enclosure under a seat to be completely hidden away. The enclosure itself it engineered with a durable exterior that resists scrapes and bumps while under a seat, in the trunk or cargo area.

Rockford Fosgate PS-8 Shallow Mount Loaded Enclosure




General Features:

  • Punch Single 8" Amplified Loaded Shallow Enclosure
  • Power Rating:
    • Peak: 300 watts
    • RMS: 150 watts
  • Integrated Class-D Amplifier
  • Remote bass level control included
  • Includes all power, ground, and turn-on wires
  • CEA-2006 Compliant Amplifier
  • CEA-2031 Compliant & Klippel Verified Driver
  • Cast aluminum wit an ABS backplate enclosure
  • Includes mounting hardware
  • Supports Hi-level (Speaker) / low-level (RCA) inputs
  • Remote/DC Offset/Signal Sense turn on select
  • Short circuit, thermal, and reverse polarity protection
  • Quick disconnect power and signal connections
  • "Closed-loop" design ensures optimum performance between woofer, amplifier and enclosure
  • Variable 12 dB/Octave Butterworth low pass crossover: 50 - 120 Hz
  • Built-in adjustable bass boost EQ: 0 - +12 dB @45 Hz
  • Selectable phase: 0°/180°
  • Frequency response: 25 - 150 Hz
  • Input sensitivity: 125mV - 9V
  • Fuse Rating: 30A x 1
  • Dimensions: 9.40"W x 14.4"D x 3.30"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Check out the Rockford Fosgate PS-8 Owner's Manual

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.

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.

300 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.

150 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.
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.
Yes - with included adapter
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.
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 - 120 Hz
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.
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A 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.


Subwoofer Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
25 - 150 Hz
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle

Enclosure Specifications

Box Type
Represents the style of the enclosure. Be sure to purchase the appropriate enclosure type and internal volume that will be compatible with your subwoofer's recommendation.

Sealed - Sealed boxes are those that have no holes or vents in it. The only hole in a sealed box is where the subwoofer is installed. Smaller sealed boxes require more power than a larger sealed box. They provide a tight, accurate bass, while the larger sealed enclosures provide a "boomier" and louder bass.

Ported / Vented - Ported/Vented Enclosures provide an even boomier, louder bass, but less accurate then a small, sealed box. Ported enclosures typically require more airspace per sub and also less power output from an amplifier to perform correctly.

Bandpass - Bandpass enclosures make subwoofers perform efficiently, but loose. The bass is not as "boomy" as a ported enclosure nor as punchy as a sealed enclosure. Bandpass enclosures work well with lower to mid-level subwoofers.
Number of Subs/Speakers
This value represents the number of speakers or subwoofers that the enclosure accommodates.
Box Style/Shape
The box style or shape refers to the actual shape of the box. Square and rectangular boxes are straight-edged boxes on all sides, whereas hatchback and truck style enclosures feature an angled front or back design that allows for installation in places short on depth such as single cab pickup trucks. You can also use such enclosures in hatchback cars or other vehicles where space is a premium. Tube and cylinder shaped boxes were made popular by Bazooka and are a great option for those looking for a nice amount of bass without sacrificing lots of space. They may even fit in locations that slim truck boxes cannot fit in. If the enclosure is vehicle specific, we encourage you to read the product description to find out which vehicles the enclosure is made for.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
Number of Terminals
The number of terminals the enclosure has. Each terminal represents 1 positive and 1 negative.
Terminal Type
Spring clip terminals work best with bare wire connections with small-gauge speaker wire, or pin-type connectors.

Binding post terminals are a sturdier, more versatile type of speaker terminal. Because binding post terminals are are threaded, you can tighten them down against the wire or connector for a tight, clean connection. The most popular style of binding post terminals is known as a "5-way binding post". This type can accept bare wire, or any of the common speaker wire connectors. Binding posts with the option to be used with banana clips are even more versatile

Spring posts are a hybrid of the two. Instead of using a thread and "screwing" them tight, they use a spring to allow the wire to fit and tighten against the terminal.

Set Screw Connector
Box Exterior Color
The color of the enclosure's exterior/outer finish.
Box Finish
The material used on the outside of the box. Most boxes are carpeted to prevent exterior scratches; however vinyl is popular as it can often be color-matched to a near exact look of your leather factory interior.
Black Cast Aluminium

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Oak harbor, WA

Great for small trucks

March 4, 2017

This sub mounts perfectly behind the seat. I'm upgrading my HU, speakers, with a jl amp. The componet speakers. I won't say which speakers because I'm stupid for paying as much as my home speaker system so I bought one more ps8 for behind each seat. 2 months work into this system and almost ready to add some power to it. I found the ground and fuse terminations on the RF PS8 the absolute worst terminations I have ever seen. Ck yours and give a little tug and see it break free from its connection. My sister who never made a ring terminal connection would have done better. Cut them out and redo them!! I like the size of the sub and 1 behind each seat should give the punch needed.

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South Charleston, ohio

Great transaction

January 8, 2017

Bought the Rockford PS8 for a friend's Jeep Liberty. Sounds great and has just enough bass to really do well with sound quality. I would recommend this to my friends and shipping was very next day. Great transaction

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Albuquerque, NM

Verified Purchase
Great sub!

September 11, 2016

Love RF! This 8" under seat sub was perfect for my scion xb under the passenger seat. Previously had a Pyle 8" tube sub in the car and this sub works just as well if not better for bass response(though the quality of the sound is obviously better).

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Harrisburg, PA

Great for Head Unit powered speakers

June 15, 2016

I installed this under the rear seat of my friend's 1500 Silverado. It was installed along with a Pioneer HU and new Polk Components/Coaxials in the doors. This little sub system is an amazing addition. I actually had to turn it off to make sure it was working because it was so well integrated. 150W RMS is perfect for an application like this (in-cabin/underseat).

I just had a chance to road tune everything on a 2.5 hour road trip, and at every volume, even with the windows down, this thing could be felt and heard.

As long as you don't go in expecting to feel 2-12's on 1000 Watts, this thing can't be beat. I've always been wary of slim subs, especially prefabbed/powered ones. I've always been a Rockford fan, and after seeing how much room we had to work with, I don't thnk I could have built anything better, especially for the price, and gotten these results.

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Your Price $59.99

Boom Mat Damping Material (050210)

20.8 sq.ft Damping Material - (10 pk - 12-1/2" x 24" x 2mm )

Your Price $99.99

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Browse 2 questions and 6 answers
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Why did you choose this?
Sonic Electronix Store
Rockford Fosgate PS-8 has a low enough freq. response to hit the lows I am looking to achieve.
Frank F on Jul 3, 2017
great product fits in my cj7 under the seat my friend has one
leon d on Sep 2, 2016
looks compact and sleek. fits my needs for a standard cab Silverado. has good reviews.
stephen r on Sep 9, 2016
Brand reputation, size, and price
Jamie B on Jul 16, 2016
How does this connect to RCA outputs?
BigCH on Aug 21, 2015
Best Answer: Hello Clinton,

With the provided RCA harness - pictured in the gallery.
Reply · Report · Rick MStaff on Aug 22, 2015
· Add Answer · I Have This Question Too (0)

Product Summary


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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 PS-8 Punch Powered Subwoofer Enclosure

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Rockford Fosgate PS-8 Punch Powered Subwoofer Enclosure

300W 8" Punch Powered Under-Seat Loaded Subwoofer Enclosure with High & Low Level Input for OEM or Aftermarket Integration


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