Alpine PWE-S8

Compact 120-watt powered 8" subwoofer

Item #: 500PWES8

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13 Reviews

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Big sound from a small box

Don't have the space for a big subwoofer enclosure, but still want the thrill of sub-bass? At only 3" deep, Alpine's PWE-S8 powered subwoofer fits in all kinds of tight spaces: in the trunk of your car, behind the seat in your pickup, or even under the seat in some cars. And it's made to stand up to life on the road, with its rugged cast metal enclosure that's built to take the hard knocks of a tight installation while protecting your equipment.

In the box

Alpine PWE-S8 side view

At only 3" deep, the PWE-S8 can fit almost anywhere.

Alpines uses a Class D amplifier rated at 120 watts RMS to drive the PWE-S8's 8" shallow-mount, high-excursion subwoofer, so there's plenty of power for your bass. The amp features controls for phase, gain, and a low-pass crossover, so you''ll be able to match the bass up to the rest of your system.

You'll also find an input for a wired remote control that lets you dial in your sound from the driver's seat. Easy-access RCA line-level inputs and speaker-level inputs with automatic turn-on make it easy to integrate this sub into almost any system. The PWE-S8 has everything you need to bring bass to places where there was never the room for boom.

Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

Product Highlights:

  • powered subwoofer with cast metal enclosure
  • 8" woofer high-excursion cone
  • built-in Class D amplifier (120 watts RMS/240 watts peak)
  • frequency response: 32-150 Hz
  • variable low-pass crossover (80-200 Hz)
  • variable phase control (0-180 degrees)
  • preamp- and speaker-level inputs
  • dimensions: 13-1/2"W x 9"H x 3"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Who needs a powered subwoofer?

To produce bass, you need a sub, an enclosure, and an amplifier, and it can be little tricky to match them all up. A powered sub eliminates all the hassle, as the manufacturer designs the enclosure to house the sub and amp together. This all-in-one solution is especially useful in smaller vehicles, where there's no room to mount a separate amp, or in any vehicle where you need every bit of cargo space. Powered subs range from small, flat boxes that fit under your seat to larger boxes that go in your trunk.

Alpine PWE-S8 Reviews

Average Customer Review:

13 reviews
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Amazing sound

Written By TomS, Missouri on Monday, November 09, 2015

I looked at a lot of powered subs, articles, reviews, and decided on this one based on some of the reviews and the Alpine reputation. What a great decision. I had it professionally installed in my 2013 Ford Supercrew and couldn't be happier. It fills the cab with clean bass and way more than enough volume. You won't be disappointed.

Pros: Size, quality construction, sound

Cons: I would have liked to hear it before buying. It would have made my choice much easier.

Great Sub for Tight Spaces

Written By Daniel, California on Tuesday, September 01, 2015

Crutchfield Customer Review (What's this?)

This is a great high powered 8" unit. I installed one under the driver seat and one under the passenger seat in my '04 Double Cab Tacoma. They take up virtually no space and are complexly hidden under the seats. Two of these together makes for a solid sub combo.

Pros: Small. High powered. High quality unit enclosure.

Cons: Expensive.

Made a huge difference in my 2013 Audi S4

Written By wohoho, Massachusetts on Thursday, August 20, 2015

Crutchfield Customer Review (What's this?)

When I bought my 2013 S4, it was at the end of the model year and I was unable to get one with the B&O sound system. Although the basic Concert system has 10 speakers, its deficiencies became clearer over time. The free air sub on the rear deck is by far the weakest link. I hate to add one with an enclosure in the trunk that would lose a good part of the luggage space. The PWE-S8 proves to be the perfect choice. The 8" sub may seem small, but the 120W amp and solid aluminum chassis are designed as an integrated unit. make it perform far better than what one might expect from an 8" driver. I can't see ever needing more for listening to music. I see some people who installed this sub and say that it's not doing much, but that could be a defective unit, improper adjustment or bad installation. There is simply no way that this sub would ever have little or no effect on the bass. There are other choices of compact powered subs. I chose this one because I decided on Alpine SPR-60C for the front and rear door replacement after listening and comparing to others under $500/pr. So it's an easy decision to get the Alpine sub. I placed it just behind the passenger's seat on the driver's side. Folding down the seat makes easy access to the adjustments and connections. Otherwise they are out of the way. The factory amp is 40Wx2 for the front pair and 20Wx2 for the rear. Having 120W for the sub is more than enough.

Alpine PWE-S8 Reviews

Written By Anonymous, Virginia on Wednesday, July 08, 2015

The unit is small enough to tuck it away in a small car and not very obvious

Pros: small enough, quality workmanship

Cons: not powerful enough

Excellent sub!

Written By Anonymous, Indianapolis, IN on Wednesday, June 03, 2015

Crutchfield Customer Review (What's this?)

Great frequency response, plenty of punch for a "normal" system without being muddy. This is a much better package than the Sound Ordinance powered sub it replaces. Well worth the extra bucks!

Powered Sub

Written By Brian, Westchester, New York on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

This fit perfectly behind the waterfall in a C5 convertible. What a great improvement to audio systems in small interiors.

Pros: Built like a tank.

Cons: None

Great Things Come in Little Packages

Written By Colton, Oklahoma City on Wednesday, February 25, 2015

If you're looking for a great subwoofer that takes up little space, then this is just the ticket. Fits perfect under the driver or passenger seat and delivers exceptional sound. It completed my sound system without adding boxes in the back of my SUV.

Pros: Small and powerful

Cons: None

Quality sound

Written By CmG, Washington on Tuesday, January 27, 2015

Crutchfield Customer Review (What's this?)

Installed 2, 1 under drivers and 1 under passengers seat in my 2007 extended cab Nissan Frontier and I'm happy with them. Using an Alpine receiver that already had a nice sound quality to start with and these units were a nice compliment. Best feature in my opinion is the small footprint which allowed for a discreet installation location. Sound quality exceeded my expectations, not extremely powerful but thats not what i was after anyway. I like the build quality as well, heavy construction with nice fit and finish throughout. Installation maybe took half an hour at most.

Pros: Great sounding, heavy construction, extremely simple installation

Cons: Id prefer if the power and ground leads weren't built into the speaker wire harness just to eliminate some wire clutter but could always clip some unused wires to clean things up

more than pleased

Written By Butch, Texas on Tuesday, December 30, 2014

I've tried multiple powered subs like this and this one is the best so far. I'm an Alpine guy since the early 80's and I'm glad that Alpine has finally joined the compact sub group. I put this behind the back seat in a 2013 F-150 SuperCrew. It fills out the music nicely. It's not the slam your head into a wall subwoofer but rounds it out and has enough thump to let you know it's there. The higher volume setting will make the mirrors and the seat vibrate but not to the point of it becoming mind numbing. I couldn't be happier.

Pros: size, hookup, Alpine

Cons: none

Small subwoofer big sounds

Written By Flys4u, Houston, TX on Sunday, November 30, 2014

Crutchfield Customer Review (What's this?)

I installed this on my Porsche 944. Don't have much room so needed small sub without the big box. This creates so much better sounds than with just speakers.

Pros: Small size. Easy to install. Great sounds

Doesn't make much difference

Written By Julio L., Elk Grove, CA. on Wednesday, October 29, 2014

Crutchfield Customer Review (What's this?)

I didn't expect that this subwoofer would be loud, but I did expect that would improve the sound quality, but it didn't. I have a stock headunit connected to a 4-channel amp that feeds a pair of components and a pair of 2-ways, the adition of the sub didn't make much difference.

Pros: compact size and solid construction

Cons: doesn't kick enough.

PWE-S8 Subwoffer

Written By Rod L., Wisconsin on Monday, September 29, 2014

Crutchfield Customer Review (What's this?)

I would not buy this product again, nor recommend it, it lacks power output and clairity. There are a number of better quallity subs that pack more output.

Pros: Small in size, easy to mount

Cons: Poor amplification, way over priced! Lacks power

Quality product

Written By Darren, Folsom, CA on Friday, September 19, 2014

Crutchfield Customer Review (What's this?)

Very pleased with this powered sub. I purchased this for my 2010 Ford F-150. It fit perfectly under the rear seat on the passenger side. Build quality of this sub is exceptional. This sub is not cheap, but it also will not disappoint. Install time in my truck was approx 2.5hrs. Sound quality is exceptional if you are looking for fidelity and not to rattle your doors. The sub does include the wired remote. The Crutchfield Overview states the wired remote is an optional assessory... Not the case....Very happy with this purchase

Pros: High quality build, excellent sound/fidelity, fits under the seat of a Ford F-150 ??

Cons: High side of the price range

Crutchfield response on Monday, September 22, 2014 We looked into it and Darren is correct: the wired remote is included in the box with the powered sub. We've updated our records and website accordingly.

Hands-on research

What's in the box?

Download owner's manual

  • Amplified enclosure with one 8" subwoofer installed
  • 12" Wiring harness (Power with in-line fuse holder/ Ground/ Remote turn-on/ Speaker level input)
  • Two 15 amp ATO fuses (one installed in the power wire fuse holder/ 1 spare)
  • Remote level control with 15' cable attached (3.5mm mini-plug on the end)
  • Adhesive backed hook and loop mounting fasteners (to mount the remote)
  • 4 Mounting brackets
  • Eight 5/8" Pan head self-tapping screws
  • Eight M4x7.5mm Machine screws
  • Owner's manual (English/ French/ Spanish)
  • Warranty information
  • On-line product registration information
  • System installation notice

Features and Specs

Enclosure Type Sealed
Finish Material Cast Aluminum
Grille Steel
Connector Type RCA/Harness
Bi-amp Inputs No
Woofer Size (inches) 8
Woofer Material Poly/Aluminum
Passive Radiator ---
Width 13-7/16"
Height 2-7/8"
Depth 9-1/16"
Second Depth N/A
Parts Warranty 1 Year
Labor Warranty 1 Year
Frequency Response 25-152
Amplifier Power (RMS) 120 watts
Maximum Wattage 240 watts
Sensitivity N/A
Impedance N/A
Second Voice Coil Impedance N/A
Crossover Point 50-150

Product Research


Auto Turn-on: If using the speaker level input, an automatic circuit turns the amplifier on when it senses an input signal. When using the line level inputs you must also use a remote turn on lead.

Low Pass Filter: The amp has a built-in low-pass filter, variable from 50 to 150 Hz.

Speaker Level Input: A speaker level input harness is included, making it easier to add the amplifier to a factory radio or to a receiver with no preamp outputs.

Wired Remote: Using the included wired remote you can easily adjust the bass output level from the driver's seat (or wherever you mount the remote). The range is 0 to -20 dB, relative to the gain setting on the subwoofer chassis.


  • Gain: rotary control; 0.2-4.0 volts line level; 0.5-10 volts speaker level
  • Low Pass Filter: rotary control; 50-150 Hz
  • Phase: two position switch; 0° or 180°
  • Power Mode: two position switch; SP IN (speaker level input, auto sensing) or REM (wired remote turn-on)


  • Harness: the included 12" harness contains power (+12 volts), ground, remote turn-on, and speaker level inputs (left and right)
  • RCA: left and right line level inputs
  • Remote: 3.5mm mini-jack for use with the included wired remote


  • Width: 13.4"
  • Height: 2.875"
  • Depth: 9.062"

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.