Polk Audio
- Hard-to-beat pricing
- Free shipping across Canada
- Manufacturer’s warranty
- Get a quote on new Polk
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.
Showing 1–12 of 44 resultsSorted by price: high to low
Polk Audio f/x 500i Bipole/Dipole Surrounds — Made in USA, Pair
A genuine mirror-imaged pair, labelled LC and RC, with two driver arrays set 45 degrees apart and a rear-panel switch that flips them between bipole and dipole — locatable effects on the wall behind you, a diffuse field on the side walls, same speakers either way. 19.4 lbs each, half again the weight of the FXi A6 that replaced them, and 2 dB more sensitive. Built in the United States, with keyhole mounts moulded into the cabinet. Very Good condition.
Polk Audio RT55 Bookshelf Speakers – Real Wood, 200W
Two 6.5-inch Dynamic Balance drivers and a 1-inch trilaminate dome tweeter per cabinet, 91 dB sensitive and rated 20 to 200 watts into 8 ohms. Real wood veneer in black, with dual 5-way binding posts for bi-wiring or bi-amping, 35 lbs each. The grilles have been freshly re-clothed. Condition very good.
Polk FXi A4 Dipole Bipole Surround Speakers, Pair
Two 1-inch silk/polymer dome tweeters aimed 45 degrees apart and a 5.25-inch Dynamic Balance woofer in a triangular, side-ported cabinet, with a switch that moves them between dipole and bipole. 88 dB, 8 ohms, 20 to 150 watts, keyhole-slotted for wall mounting. Voice-matched to Polk's RTi and CSi models. Good working condition, fully tested.
Polk Monitor XT35 Center Channel Speaker; Ultra-Low Profile
A one-inch Terylene dome tweeter with four three-inch bi-laminate paper woofers, front-ported, in a cabinet 24.4 inches wide and only 4.2 high — low enough to sit under a screen without covering it. Nickel-plated five-way binding posts, keyhole slots and a 1/4-20 threaded insert for wall mounting. Excellent condition, fully tested.
Large, Heavy TOTL Polk Center Channel w/ Real Wood CSi40
Dual 6.5-inch Dynamic Balance drivers either side of a 1-inch silk/polymer dome, in a real black wood veneer cabinet 22⅝ inches wide and 24 pounds heavy. Response runs to 50 Hz at 91 dB into 8 ohms, and it will take up to 250 watts. Two sets of gold-plated 5-way posts, so biamping or biwiring is open to you. Voice-matched to the Polk RTi series.
Polk CS2 Series II Center Channel Speaker – Dual 6.5″ Woofers
A Polk Audio Monitor CS2 Series II center channel speaker in black, with dual 6½-inch woofers for full-bodied, clear dialogue. It has been tested on our bench and is in very good condition.
✔️ Very good condition — black wood-grain, black cloth grille included
✔️ Dual 6½-inch Dynamic Balance woofers for clear, full-bodied dialogue
✔️ 90 dB, 8 ohms, magnetically shielded — tested on our bench
✔️ Covered by Radique Warranty
✔️ Includes Perpetual Trade-Back Program eligibility
✔️ Expertly packed for safe shipping
Polk Audio PSW350 10″ Front-Firing Powered Subwoofer 260W
A 10-inch front-firing Dynamic Balance woofer on a 100-watt RMS amplifier — 260 watts dynamic — in a dual-rear-ported cabinet good for 25 to 180 Hz. Speaker-level in and out, stereo line inputs and an unfiltered LFE jack, with a variable 60 to 160 Hz low-pass and a phase switch. 37 lbs, black matte. Very good cosmetic condition.
Polk Audio CS245 Center Channel Speaker – 19lbs!
Two 5.25-inch Dynamic Balance mid/bass drivers flanking a 1-inch dome, all video-shielded, with a cascaded second-order crossover at 2 kHz and 900 Hz to keep voices open. 90 dB, 8 ohms, 10 to 180 watts, 52 Hz to 26 kHz. Five-way binding posts, black finish, 16.75 inches wide and 19 lbs. Very good cosmetic condition.
Great Sounding Budget Speakers from Polk Audio R150
A 5.25-inch Dynamic Balance woofer on a butyl rubber surround with a three-quarter-inch neodymium-magnet tweeter, in a ported, video-shielded cabinet seven inches wide. 65 Hz to 20 kHz at -3dB, 89 dB, 8 ohms, up to 100 watts, on five-way binding posts. Two pairs are available: $145 a pair, or $245 for both.
New Polk Audio
New Polk Audio, quoted direct from the Canadian distributor
🍁 New Polk Audio is available to Canadian customers only.
We don't stock new Polk Audio, and that's why we can be so competitive: we source directly from the Canadian distributor and it ships free, straight to you, usually faster than a big-box store pulling from its own warehouse. From bookshelf pairs and towers to centre channels and subwoofers, we'll quote the exact models you're after.
Hard to beat pricing
Direct distributor sourcing and lean overhead mean sharper pricing. Simple as that.
Honest guidance
Not sure which model fits your setup? We'll help you compare without the upsell pressure.
Support after the sale
Questions after delivery? We're here, long after the big-box store has forgotten your name.
Small Canadian business
Ottawa-based, people-first, and genuinely passionate about audio. Your purchase keeps it that way.
Building a full system? Polk speakers are a natural match for the Denon and Marantz components we also quote new. Ask for a bundled quote and we'll spec the whole setup.
Request a new Polk Audio quote
Tell us the model you're after, or describe what you're building, and we'll get back to you quickly with pricing and availability. Waiting for a used Polk instead? The same form puts you on our list.
✔ Fast turnaround ✔ Free nationwide drop-ship ✔ No pressure, no runaround






































