Polk Audio CS175 center channel speaker in black, grille off, showing the round front port, centre tweeter and mid-bass woofer

Polk Audio CS175 center channel speaker seen at an angle with the grille off, matte black cabinet, port, tweeter and woofer

Polk Audio

Polk Audio CS175 Center Channel Speaker – Front-Ported, Black

Name: Polk Audio CS175 Center Channel Speaker – Front-Ported, Black
Brand: Polk Audio
SKU: 19852
Price: 125.00 CAD
Availability: InStock

$125.00

A Polk Audio CS175 two-way center channel speaker in black, a solidly built cabinet at nearly 14 pounds, with a front port and proper 5-way binding posts, fully tested on our bench and in very good condition.

✔️ Very good condition — free of significant marks, grille included
✔️ Front-ported two-way center with 5-way binding posts
✔️ Solidly built, at nearly 14 pounds
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping

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Description

A Polk Audio CS175 two-way center channel speaker in black, a solidly built cabinet at nearly 14 pounds, with a front port and proper 5-way binding posts, fully tested on our bench and in very good condition.

What it is

The center channel does the most important job in a home theater: it carries the dialogue and keeps it anchored to the screen. The CS175 is Polk Audio’s two-way answer, and it is more substantial than it looks: a long, low cabinet nearly 17 inches wide and close to 14 pounds, with a tweeter in the middle and a mid-bass woofer beside it. It sits on a shelf, a stand or a TV console, and it sounds great for its size.

The round port on the front reinforces the bass, and because it vents forward rather than out the back, the CS175 is happy close to the wall or tucked into a cabinet under the TV. Polk rates it at 89 dB and 8 ohms, with a frequency range of 55 Hz to 22 kHz and up to 100 watts of power handling, so any home theater receiver drives it easily.

Around the back, a pair of 5-way binding posts take bare wire, spades, pins or banana plugs. We recommend our own Radique Audio gold-plated banana plugs, and our Custom Speaker Cable Builder will make a pair to length, ready to plug in.

The service it has had

Fully tested on our bench before listing.

Condition

Very Good, and free of significant marks. The black cloth grille is included.

A solidly built Polk center that puts dialogue where it belongs, with great sound for its size.

Available for pickup in Kanata, or shipped across Canada and internationally — we have sent equipment to fifteen countries in the past year, each piece packed in-house in 275 lb test double-wall boxes. Live shipping rates for your address are calculated at checkout. Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. Available for audition by appointment in Kanata.

Polk Audio CS175 Specifications

Type: two-way center channel speaker, front-ported
Service: fully tested on our bench
Drivers: one tweeter, one mid-bass woofer
Frequency range: 55 Hz to 22 kHz
Sensitivity: 89 dB
Nominal impedance: 8 ohms
Maximum power handling: 100 watts
Terminals: one pair of 5-way binding posts; take bare wire, spades, pins or banana plugs
Finish: black, with black cloth grille
Dimensions: (Width x Height x Depth) 16.7 x 6.3 x 9.25 inches (425 x 161 x 235 mm)
Weight: approx. 13.7 lbs (6.2 kg)

🔌 Speaker Cable, Built on Our Own Bench

The speaker terminals here are five-way binding posts, so they take banana plugs or spade lugs and you have the run of the options. We hand-build speaker cable here in any length you need — choose the gauge and the terminations on our Custom Speaker Cable Builder. If you would rather terminate cable you already own, we make our own gold-plated banana plugs and spade connectors as well. 👉

✅ Buy With Confidence — The Radique Promise

Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. When you’re ready to move on, we’ll take it back. That’s the Radique difference.

📦 Watch how we protect your gear — our unboxing video.

📺 Curious about our business? Check out our YouTube channel for behind-the-scenes videos and more!

📞 Questions? Use the Ask a Question button above, or call us at 613-416-9995.

$125.00

Additional information

Weight	15.7 lbs
Dimensions	13.25 × 20.7 × 10.3 in
Impedance	8 Ω
Power Handling	51–100 W
Sensitivity	86–89 dB

About brand

Polk Audio at Radique

New Polk Audio, too, quoted direct from the Canadian distributor:

Hard-to-beat pricing
Free shipping across Canada
Manufacturer's warranty
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Shop used Polk Get a quote on new Polk

We service Polk, too. Bring us your own Polk speakers and subwoofers for repair, servicing or restoration (speakers up to 80 lbs each), with a 90-day warranty on the work. See our Audio Service page

Polk Audio began in Baltimore in 1972, founded by Matthew Polk, George Klopfer and Sandy Gross. Its SDA speakers of the 1980s used a cable between the left and right speakers to widen the stereo image. We carry Polk towers, bookshelf speakers, centre channels and subwoofers. We've had more than 180 Polk listings so far, covering more than 80 different models. Every used Polk here is inspected, tested and serviced as required, then photographed in-house and covered by our Bumper-to-Bumper Warranty and Perpetual Trade-Back Program. Looking for new Polk? We also quote new Polk Audio direct from the Canadian distributor, with free shipping within Canada: request a quote below. Don't see the model you want? Tell us on First Dibs and we'll email you when one arrives.

Our five best-selling Polk models so far: the RTi10 towers, the PSW10 and PSW125 subwoofers, the RTi4 bookshelf speakers and the CSi3 centre.

The Polk story, 1972 to today

Matthew Polk, George Klopfer and Sandy Gross, graduates of Johns Hopkins, founded Polk Audio in Baltimore, Maryland, in 1972. The Monitor 7 of 1974 was their first model to succeed, and the Monitor 10 followed in 1976.

SDA. In 1984 Polk introduced SDA (Stereo Dimensional Array). A cable between the left and right speakers lets each one cancel the sound that crosses over to the wrong ear, for a wider stereo image.

Growth. Polk went public in 1986 and moved to new premises in Baltimore. It began moving manufacturing to Tijuana, Mexico, in 1988, and by 2012 Stereophile reported that Polk designed in the US and built in China.

New owners. Directed Electronics agreed to buy Polk in 2006. Polk later became part of Sound United, Masimo bought Sound United in 2022, and in September 2025 HARMAN, a Samsung company, completed its purchase of Sound United. The 2018 Legend series brought SDA back.

Which Polk is which?

Monitor (1970s to early 1990s): the Monitor 4, 5, 7, 10 and 12, with A, B and C revisions.

SDA (1984 to about 1991): the SDA-1 and SDA-2 families, CRS, SRS and the later "TL" models.

RTA (1979 to 1992): towers such as the RTA 11t, with two woofers and two passive radiators.

RT and RTi (2001 onward): Polk's lower-priced lines. Our best-selling RTi10 towers and RTi4 bookshelf speakers come from here.

CSi centres and PSW subwoofers: the CSi3 centre and the PSW10 and PSW125 subwoofers are among the Polks we sell most.

LSi (about 2001 to 2010) and LSiM (2011): Polk's flagship lines of that decade, followed by Signature (2016), Legend (2018) and Reserve (2021).

Buying used Polk: what to check

SDA cable. SDA speakers need the interconnect cable between them for the SDA effect, and early SDA models need a common-ground amplifier. Make sure the cable comes with the pair.

Tweeters. Owners report that some SL3000 tweeters on the 1989 to 1991 SDA TL models leaked their ferrofluid and failed, and that Monitor-series pairs may carry mismatched factory or replacement tweeters. Check that every tweeter plays.

Surrounds. Some early Polks used foam surrounds, which rot with age; later models such as the RTA 11t and LSiM use rubber. Press gently on each woofer surround.

Everything we list is inspected, tested and serviced as required here, and comes with our warranty.