Unlike Any Store You've Ever Seen
Free Shipping on Thousands of Products
Award-Winning Customer Service
Discontinued Product

Polk Audio High Performance Black Bookshelf Loudspeakers - LSi7

Abt Model: LS17BK | UPC Code: 747192117542
Roll over image to zoom in
This product is no longer available.

Product Details

Polk Audio High Performance Black Bookshelf Loudspeakers - LS17BK

One Sweet Sounding Speaker

LSi7 sounds just as wonderful as all of its bigger brothers, with a little less bass. Works great for a system not needing as much power, yet it's extremely versatile. You can use it as a front channel or a surround speaker. Lsi7 also has a keyhole slot for easy wall mounting. This speaker is a real gem and will run rings around most bookshelf sized speakers on the market. Add a subwoofer and you've got the whole package


Ring Radiator Tweeters

These exotic tweeters offer some of the finest highs you'll hear out of a speaker. The ring radiator tweeter is the same one found on ultra-high end speakers that cost more than a car! But with Polk LSi, you can experience its precise accuracy and meticulous detail at a fraction of the price.

Ebony or Cherry Side Panels

Made from real wood veneer instead of simulated vinyl. The side panels bring each side's thickness to 1.5" to further brace the cabinet against unwanted resonances. Best of all they look marvelous.

Cast Aluminum Driver Frames

Other speakers use inferior stamped steel baskets which can flex while playing, muddying up the mids. Not so with LSi series- the midbass drivers use cast aluminum baskets to prevent unwanted flex.

Aerated Polypropylene Drivers With Dynamic Balance

How does LSi sound so warm and natural? The material the speaker is made of has a lot to do with it. Aerated polypropylene is stiff on the outside providing transient response, but "chewy' on the inside providing damping and light mass. Want to learn more about the benefits of this space age material? Click here for an in-depth explanation. Dynamic Balance is a Polk perfected method of analyzing a speaker's behavior at the microscopic level with lasers to tune out unwanted resonance and distortion.

Mirrored Design

Ordinary speakers use the same speaker as the left and right, but higher end speakers such as LSi are mirrored, designated left and right. This brings you perfectly balanced stereo imaging.

Adjustable Rubber Feet/Carpet Spikes

On tower models, the feet are adjustable incase your floor isn't as perfect as your speakers. Use the non skid rubber feet on hard surfaces and spikes on carpet.


Patented Polk technology is featured on every LSi Series speaker. PowerPort provides deep bass while preventing unwanted air chuffing.

Piano Gloss Black Cabinet

The piano gloss black cabinet looks classy and blends in with either antique décor or modern high tech furnishings, but it doesn't stop there. The cabinet is extensively braced killing any unwanted cabinet resonance. Knock on any LSi speaker to give them the knuckle test and feel how solidly they're built.

Magnetically Shielded

All models* are magnetically shielded for safe placement near CRT displays. *Except LSiFX, but you wouldn't put your surround speakers next to your TV anyway.

ARC Port

Featured in all models*. Unfortunately all speakers have a resonance point that will cause midbass boom causing vocals to sound "chesty." We address this problem head on with patented** ARC Port technology bringing you clear, resonance free midrange.

Cascade Tapered Array

Cascade Tapered Array is an advanced crossover configuration providing wider dispersion and greater midrange accuracy on multi-driver speakers. It's only used on higher end speakers. Your mids will sound more natural and every seat will hear spectacular sound. Pretty neat?

Perfectly Matched To LCi In-Wall/Ceiling Speakers

Do you have freestanding LSi front speakers but can't mount surrounds or a center? The perfect solution is to use Polk LCi series in-wall/ceiling speakers. They use the same Ring Radiator Tweeter and Aerated Polypropylene Drivers as their freestanding counterparts. You'll have stealth and a perfectly matching system keeping everybody happy.

Bi-Amp*/Bi-Wire Capable And Premium Connectors

All speaker connectors are gold plated for maximum signal transfer. In addition, you may bi-amp or bi-wire each speaker to further maximize sound quality. *LSi25 is already bi-amped but may be bi-wired.

Complete Your System With A DSW MicroPRO Subwoofer

Our top-of-the-line subwoofers are a perfect match for LSi Series Loudspeakers. Their piano gloss black finish, deep reaching lows and accuracy complement the LSi series bringing you the best. It's like a match made in heaven.


Driver Complements

  • Mid/Woofer: 1 - 5-1/4" Diameter (13.34cm) Dynamic Balance with Aerated Polypropylene cone, cast basket and rubber surround (shielded)
  • Tweeter: 1 - 1" Diameter (2.54cm) Dynamic Balance Ring Radiator (shielded) Electrical


  • Overall Frequency Response: 45Hz - 27kHz
  • Lower -3dB Limit: 53Hz dB
  • Upper -3dB Limit: 26kHz dB
  • Nominal Impedance: 4 ohms
  • Recommended Amplifier Power: 20 -150 w/channel
  • Efficiency: 88 dB
  • Crossover: 2.4kHz; HPF 18dB/oct, LPF 12dB/oct.
  • Inputs: Dual 5-way binding posts for bi-amp/bi-wire


  • Mounting Options: Bookshelf, stand, on-wall with built-in keyhole slot
  • Enclosure Type: Vented via rear-mounted Power Port and a single front mounted ARC port
  • Accessories: Rubber bumper pads

Approximate Weight:

  • Unit: 40 lbs
  • Shipping: 50 lbs

Approximate Dimensions:

  • Depth: 10.25"
  • Height: 13.63"
  • Width: 8.63"

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): 5 Years Parts And Labor
Downloadable Resources
Get Adobe Reader
Key Features
Ring Radiator Tweeters/ Ebony or Cherry Side Panels/ Cast Aluminum Driver Frames/ Aerated Polypropylene Drivers With Dynamic Balance/ Mirrored Design/ Adjustable Rubber Feet/Carpet Spikes/ PowerPort/ Piano Gloss Black Cabinet/ Magnetically Shielded/ ARC Port/ Cascade Tapered Array/ Perfectly Matched To LCi In-Wall/Ceiling Speakers/ Bi-Amp/Bi-Wire Capable And Premium Connectors/ Black Finish/ Price Per Pair
More reasons to buy the Polk Audio LSi7 from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The Polk Audio LSi7 is Brand New.
  • The Polk Audio LSi7 Ships in a Factory Sealed Box.
Frequency Response2.4kHz; HPF 18dB/oct, LPF 12dB/oct.
Impedance4 ohms
Tweeter Size (inches)1 - 1" Diameter (2.54cm) Dynamic Balance Ring Radiator
Woofer Size (inches)1 - 5.25" Diameter (13.34cm) Dynamic Balance
Height (inches)13.63"
Width (inches)8.63"
Depth (inches)10.25"
sign up for our newsletter
Join Our Email List & Get $25 Off your next order of $250 or more.