Polk Audio CSW155

Passive in-wall subwoofer with matching amplifier

  • Polk Audio CSW155


Item# 700CSW155
Out of Stock
Ship date unknown
Contact us
Reserve yours risk-free
Call   Email   Chat
Email me when available
Price separately:
Package Discount
Package price $1,299.98
Add to cart

Our take on the Polk Audio CSW155

by Amanda P.
Polk Audio

Why add a powered subwoofer?

A powered subwoofer gives you bass you can feel as well as hear. Our customers love the depth and impact their subs add to music and movies. We hear comments like "it brings out sounds I didn't know existed in discs I've watched a million times." Powered subwoofers aren't just for big bass that rattles your picture frames; they can also deliver tight, accurate lows. If you haven't shopped for a powered sub in a while, you might be surprised at how small they get. Look for an ultra-compact model if you want to tuck your sub away under an end table or in a corner.

Experience deep, high-impact bass without sacrificing an inch of floor space. Polk's CSW155 installs discreetly in your wall for a clutter-free look. Its 10" driver delivers impressively full, powerful lows — from the earth-shaking rumble of an on-screen avalanche, to the fine, precise tones of an upright bass in a jazz concert. This capable sub features a high-quality build and sophisticated design to ensure clean, smooth low-frequency response. And once it's installed, all you'll see is the included aluminum grille.

Plenty of power for great bass
This subwoofer is packaged here with Polk's separate, cool-running digital amplifier that pumps out 500 watts of solid power. An included custom sound-shaping circuit card precisely tailors the amp's output for the CSW155. The resulting bass is deep, hard-hitting, and distortion-free. This stable amplifier can also power a pair of the CSW155s for even bigger, stronger bass.

The amp's standard chassis width lets you stack it neatly with your other audio/video components, or you can hide it away in a cabinet to reduce room clutter.

Got wire?
Most speakers don't include any. Learn more about in-wall wiring at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.


    CSW155 subwoofer:
    • 10" woofer
    • frequency response 36-120 Hz (-3dB)
    • rigid MDF (medium-density fiberboard) slot ported enclosure with steel plate reinforcement
    • Klippel-analyzed woofer for low distortion
    • 2" voice coil for high output and power handling
    • cast aluminum basket for minimal resonance
    • neodymium magnet
    • mounting hardware, anti-rattle isolation pads included
    • 15-1/2"W x 17-1/2"H grille included
    • cutout: 14"W x 60"H
    • mounting depth: 3-3/8"
    • lifetime warranty
    SWA500 amplifier:
    • 500 watts (mono) RMS into 4 ohms at <0.01% THD
    • frequency response 15-200 Hz (-3 dB)
    • Class D digital amplifier design
    • continuously variable 40-120 Hz low-pass crossover
    • includes custom sound-shaping circuit cards for CSW100, CSW200 and CSW155 subwoofers
    • speaker-level and line-level inputs and outputs
    • unfiltered LFE (Low Frequency Effects) input for connection to a home theater receiver's subwoofer output
    • detachable AC power cord
    • 17"W x 4-1/16"H x 14-15/16"D
    • warranty: 3 years
    • Our 60-day money-back guarantee

    Hands-on research from the Crutchfield Labs (what are the Labs?)

    Features and Specs
    Video Shielded
    Woofer Size (inches)
    Woofer Composition
    Firing Direction
    Into Room
    Preamp-Level Inputs
    Speaker-Level Inputs
    Speaker-Level Outputs
    Low-Pass Crossover Freq
    40 -120 Hz
    High-Pass Crossover Freq
    Phase Switch
    Amplifier Output (watts)
    Frequency Response
    36-120 Hz
    Height (inches)
    Width (inches)
    Depth (inches)
    36 lbs
    Speaker Parts Warranty
    Speaker Labor Warranty
    Amplifier Parts Warranty
    3 Years
    Amplifier Labor Warranty
    3 Years
    Product Research
    What's in the box?

    Download owner's manual

    • This package contains two individualy-packaged items: the Polk Audio CSW155 subwoofer and Polk Audio SWA500 subwoofer amplifier
    • The CSW155 box includes:
    • In-wall/in-ceiling subwoofer
    • 4 Metal mounting brackets
    • 5 Self-adhesive foam isolation pads (1" x 8")
    • Sixteen 1" Wood screws
    • 16 Flat washers
    • White aluminum grille w/plastic frame
    • Twelve 3/4" Wood screws
    • Owner's Manual
    • Installation sheet (English)
    • Installation sheet (French)
    • Online product registration sheet
    • The SWA500 box includes:
    • SWA500 Subwoofer amplifier
    • CSW100 SPEX card
    • CSW155 SPEX card
    • CSW200 SPEX card
    • 2 Rack mount brackets
    • 4 Machine screws
    • 7-3/4' AC power cord
    • Manual
    • Online product registration sheet

    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 open the box, verify contents, 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.

    Amplifier Controls


    Mounting Location: The CSW155 is designed to be mounted between wall studs or ceiling joists. It fits comfortably between 16" OC (on center) studs.

    Woofer: The CSW155 features a long-throw, Klippel-analyzed 10" fiber cone woofer with a rubber surround. By using a state-of-the-art Klippel Distortion Analyzer, Polk engineers optimized the woofer's motor structure, voice coil alignment and suspension for the best possible performance and low distortion even at extreme listening levels.

    Woofer Design: The woofer is equipped with the following structural features:

    • Neodymium motor structure makes the subwoofer shallow without sacrificing performance
    • rigid cast aluminum basket to suppress resonance
    • 2" voice coil for high bass output and high power handling
    • inverted roll surround for reliability
    • dual spiders ensure linear excursion and prevent the driver from bottoming out

    Enclosure Construction: The CSW155 has rigidly braced MDF enclosure construction for low resonance and rattle-free performance.

    Slot Vent: The enclosure features an integrated slot vent for deep, driving bass.

    Grille: The CSW155 is designed to fire through an opening in the wall or ceiling. Once the installation is complete, the opening is to be covered with the supplied 15-1/2" x 17-1/2" perforated aluminum grille.

    Shipping Cover: The enclosure comes with a 1/2" thick, 16" x 14" MDF panel secured to the enclosure protecting the woofer. In addition to protecting the woofer, the cover can be used as a template for cutting the drywall for the grille.

    Isolation Pads: When the enclosure is installed, it fits snugly against one of the wall studs or ceiling joists. To prevent rattling, the isolation pads should be installed between the enclosure and the stud or joist.

    Mounting Brackets: The supplied brackets and wood screws allow you to mount the CSW155 to any parallel wall studs or ceiling joists.


    Compatibility: The CSW155 should only be used with the SWA500 subwoofer amplifier. The SWA500 comes with a SPEX Card that configures the EQ, crossover, and power control circuitry to match the CSW155 subwoofer. One SWA500 amplifier can power up to two subwoofers at the same time.

    Class D Amplifier: The SWA500 has a hybrid Class D amplifier that produces 250 watts RMS into 8 ohms and 500 watts RMS into 4 ohms.

    Variable Crossover: The amplifier has a built-in variable crossover that makes it easy to achieve a seamless blend with the main speakers, while the 24dB/octave low-pass filter prevents the subwoofer from being easily localized by the ear, increasing placement flexibility. The crossover point may be adjusted from 40-120 Hz.

    Protection Circuitry: The SWA500 offers thermal, short circuit, and over-current protection.

    Auto On/Off Sensing: In Auto mode, the amplifier automatically turns on when it senses a signal and turns off when no signal is present.

    Amplifier Controls

    Front Panel:

    • Low-pass Knob: adjust the low-pass crossover point from 40 Hz to 120 Hz
    • Volume Knob: adjust the volume level up or down to match the bass level of the subwoofer to the level of the other speakers in the system

    Rear Panel:

    • Phase Switch: reverses the polarity of the two speaker outputs; the correct setting is that which yields the fullest bass
    • Power Switch: choose Standby, Auto, or On



    • Speaker Out (1 and 2): gold-plated binding posts; the binding posts are not 5-way because a plastic collar prevents their use with spade lugs; the outputs are wired in parallel and allow you to connect one or two subwoofers to the amplifier
    • Speaker In: gold-plated binding posts; the binding posts are not 5-way because a plastic collar prevents their use with spade lugs
    • Line In (filtered): left and right RCA audio jacks; use this input if you wish to set the subwoofer crossover point using the SWA500's low-pass control knob on the front panel
    • LFE In (unfiltered): single RCA audio jack; use this input to bypass the SWA500's internal low-pass filter
    • Line Out: left and right RCA audio jacks
    • SPEX Card: slot for the supplied SPEX Card; a 7-pin connector plugs into the card and the card bolts into the back panel of the amplifier


    • Spring Posts: one set of spring post terminals accept pin connectors or bare wire; the terminals are mounted on the bottom panel of the enclosure
    Be the first to review this product
    Great Gear Giveaway rewards card

    Submit a review and you will be entered to win a $150 gift card

    Crutchfield Great Gear Giveaway Official Sweepstakes Rules

    Review this product:

    Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

    Your email won't be visible. Please use the email address that is associated with your order.
    (e.g., JohnD) Your review will be signed using the display name and location
    (e.g., Charlottesville, VA)

    Click on a star to rate the overall product on a scale of 1-5
    1500 characters left
    Attach a YouTube Review
    Crutchfield Video Review Guidelines
    • Only submit videos that you made or are authorized to use.
    • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
    • Please see our Review Guidelines for more information.
    500 characters left
    500 characters left

    Add accessories for the Polk Audio CSW155

    Use a high-quality cable to send the bass from your receiver to your subwoofer's amp for the kind of bass that draws you into the action. See all categories & accessories

    CableTruth 303S Subwoofer cable (9 ft.)
    Your Price: $29.99
    Add to Cart
    Monster Cable SuperFlat™ Mini Decor-friendly speaker cable with gold pin connectors (50-foot spool)
    23 people say
    Your Price: $34.95
    Add to Cart
    AudioQuest FLX-14/2 14-Gauge 2-Conductor In-Wall Speaker Cable UL-approved for in-wall use; direct-burial rated (125 feet)
    48 people say
    Your Price: $129.99
    Add to Cart
    AudioQuest FLX-14/4 14-Gauge 4-Conductor In-Wall Speaker Cable UL-approved for in-wall use; direct-burial rated (125 feet)
    2 people say
    Your Price: $219.99
    Add to Cart
    AudioQuest FLX-16/2 16-Gauge 2-Conductor In-Wall Speaker Cable UL-approved for in-wall use; direct-burial rated (125 feet)
    23 people say
    Your Price: $99.99
    Add to Cart
    AudioQuest FLX-16/4 16-Gauge 4-Conductor In-Wall Speaker Cable UL-approved for in-wall use; direct-burial rated (125 feet)
    6 people say
    Your Price: $159.99
    Add to Cart
    Panamax MD2 Space-saving surge protector with two outlets
    6 people say
    Your Price: $39.99
    Add to Cart
    AudioQuest Golden Gate Stereo interconnect cable with RCA plugs (0.6 meter/2 feet)
    15 people say
    Your Price: $64.99
    Add to Cart
    AudioQuest Big Sur Stereo interconnect cable with RCA plugs (0.6 meter/2 feet)
    2 people say
    Your Price: $96.99
    Add to Cart
    AudioQuest Sydney Stereo interconnect cable with RCA plugs (0.6 meter/2 feet)
    4 people say
    Your Price: $154.99
    Add to Cart
    AudioQuest Evergreen Stereo interconnect cable with RCA plugs (0.6 meter/2 feet)
    31 people say
    Your Price: $31.99
    Add to Cart
    Monster Cable Stereo Audio 400i Stereo interconnect cables with RCA plugs (1 meter/3.3 ft.)
    4 people say
    Your Price: $39.95
    Add to Cart
    CableTruth 303A Stereo interconnect cable with RCA plugs (6 ft.)
    1 person says
    Your Price: $19.99
    Add to Cart
    AudioQuest NRG-2 High-quality replacement AC power cable (6 ft.)
    7 people say
    Your Price: $168.99
    Add to Cart
    AudioQuest G2 Speaker Cable 16-gauge cable, connectors optional (30 feet, Gray)
    15 people say
    Your Price: $38.99
    Add to Cart
    AudioQuest X2 Speaker Cable 14-gauge cable, connectors optional (50 feet, White)
    17 people say
    Your Price: $94.99
    Add to Cart

    Why choose SquareTrade?

    The #1-Rated Protection Plan

    Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

    5-Day Service Guarantee & Free Shipping

    We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

    Protection from Normal, Everyday Use

    Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

    For a more in-depth review and enhanced detailed information on the Polk Audio CSW155, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_700CSW155/Polk-Audio-CSW155.html ).

    Get live, personalized service from an expert

    Crutchfield Advisor: Hi there.

    Crutchfield Advisor: We're happy to answer questions or provide additional info about this item.

    Advisors also available at 1-888-600-3963