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Polk TSi400 BLACK

Floorstanding Speaker (Single Speaker)

Availability: In stock



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Polk TSi400 BLACK Details

Polk TSi400 Floorstanding Speaker (Black): Small footprint, big performance

  • 4-way design
  • 1-inch Silk Dome tweeter
  • Three 5-1/4-inch Polymer Cone bass/mid-range drivers
  • Beautiful pewter accents and a high gloss piano-black top plate
  • Proprietary, patented Dynamic Balance technology dramatically reduces distortion-causing driver and system resonances
  • Dual gold-plated, 5-way binding posts provide the most secure connection options

Smaller rooms want big sound, too, and the Polk TSi400 Floorstanding Speaker delivers for them. Taking up less than one square foot of floor space, this beautiful, value-packed performer reveals detailed highs with realistic imaging. A silk dome tweeter and three resonance-free Dynamic Balance® midrange/bass drivers (arrayed with specially tuned narrow baffle geometry) belt out a wide soundstage that brings your music to life. A flared bass port keeps things anchored on the low end, blending beautifully with this speaker’s full range capability.


Unlike most other speakers in this price range, TSi enclosures are constructed of extensively braced, solid MDF with 3/4-inch baffles. This virtually eliminates internal resonances and damps energy-stealing vibrations, for more efficient operation and more transparent sound.

Polk’s proprietary, patented Dynamic Balance® technology allows their engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.

Klippel motor optimization uses laser measurement technology to ensure a smooth excursion path at either end of the volume spectrum for uniform performance at both low and high volumes.

TSi design combines smaller drivers (for more overall driver area with less driver mass) and narrow baffle geometry (taking up less than one square foot of floor space), for wider range and more spacious soundstaging, so you’ll receive optimum performance from every seat in the house.

Unlike horns or metal domes, silk dome tweeters deliver clear and detailed highs, without fatigue, even at high volume. And the durable, efficient polymer cones are tuned with Polk’s Dynamic Balance process for the smoothest, most natural sound.

Surprisingly deep, musical bass response thanks to our critically tuned flared port venting system, which minimizes port noise ("chuffing") and smooths the turbulence of port air flow, to reveal big, full-bodied bass that blends effortlessly with the speaker’s overall dynamics.

All Polk loudspeakers are timbre-matched within their series, designed with the same components throughout, to achieve seamless speaker-to-speaker blending effects in multi-channel systems.

Polk’s high efficiency design results in sound that’s spacious and clear, warm and realistic, when combined with practically any electronics, even the most modestly-powered amplifier or receiver.

The high performance crossover system boosts performance with premium components, like mylar bypass capacitors, to extend response in the higher, more detail-oriented frequencies.

Dual gold-plated, professional-style 5-way binding posts provide the most secure connection options as well as the ability to bi-amp or bi-wire your spekaers.

Fat stabilizer feet on TSi Series floorstanding models make a solid stand on both carpet and hard wood floors, with the stability and efficiency to deliver more precise bass response and superior imaging.

All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.

Additional Information

Name Polk TSi400 BLACK
Sub Title Floorstanding Speaker (Single Speaker)
Manufacturer Polk Audio
Manufacturer Part# TSi-400-Black

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  • Enclosure: Bass Reflex
  • Finish: Wood-grain vinyl
  • Color: Black
  • Tweeter: Dome
  • Tweeter Size (inches): 1
  • Midrange Size (inches): ---
  • Woofer Size (inches): 5.25
  • Woofer Composition: Organic Fiber
  • Woofer Surround: Butyl Rubber
  • Built-in Powered Sub: No
  • Video-Shielded: No
  • Connector Type: 5-way post
  • Bi-amp Inputs: Yes
  • Parts Warranty: 5 Years
  • Labor Warranty: 5 Years
  • Power Range: 20-200
  • Frequency Response: 44-24k Hz
  • Sensitivity: 91 dB
  • Impedance (Ohms): 8
  • Amplifier Power: ---
  • Dimensions (HWD): 38.75" x 8.19" x 14.5"
  • Weight: 32 lbs

    What's in the Box
  • Black tower speaker
  • Detachable cloth grille (installed)
  • Owner's Manual
  • Wall-Mount template
  • Online registration sheet
  • Polk Audio product brochure