The KEF LSX II LT ranks #26 out of 50 total Medium Size Powered Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.

Brand: KEF

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KEF LSX II LT - ranked #26 of 50 Medium Size Powered Bookshelf Speakers · Editor's rating 4.2/5

Check price at Amazon ($600.00) →

#26 KEF LSX II LT: $600.00 Amazon eBay

Pros: Coaxial (Uni-Q-style) driver keeps the tweeter centered in the midrange, giving wide and consistent dispersion both horizontally and vertically (about ±60° each) - a wide sweet spot for multiple seats or positions. The KEF Connect app provides genuinely useful DSP control: desk/wall boundary compensation, adjustable bass contour (standard/less/extra), treble trim, and subwoofer integration, letting you tune the sound to wherever it’s placed. Distortion at a moderate 86dB looks good for the speaker’s compact size. Tonal profile stays consistent from 0° to 30° off-axis, so side-seat listeners hear essentially the same balance as someone centered. Extensive connectivity for its size: HDMI, USB, optical, sub output, plus Wi-Fi/Bluetooth. Clearly outperformed the reviewer’s soundbars, including ones bundled with their own subwoofers, as a TV audio replacement.

Cons: Small drivers mean it’s SPL-limited: bass compression kicks in around 88-92dB/1m per speaker, and multitone distortion crosses the reviewer’s 3% threshold around 96dB - not intended for loud or large-room duty. F3 of 55Hz and F10 of 46Hz mean it loses much of its bass by around 50Hz; a subwoofer (controllable through the same app) is needed for real low end. Diffraction dips appear around 4-5kHz and again near 8kHz, likely tied to the tweeter housing or surround, giving a mild reduction in treble attack and sibilance. A possible port or enclosure resonance shows up around 800Hz in the rear-radiation measurements, though the reviewer wasn’t certain of the exact cause or whether it’s audible. No analog input on this LT variant, so a turntable can’t be connected directly - only the pricier standard LSX II model includes one.

How it compares: Just above it: Presonus Eris E5 - $490 cheaper, 20W less output power. Just below it: Dayton Audio M4 - $350 cheaper, 25W less output power.

App	No
Bass Extension (-10dB)	46Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)	55Hz (measured, Erin's Audio Corner)
Bluetooth	No
Dimensions	9.5"H x 6.1"W x 7.1"D (241.3 x 154.9 x 180.3 mm)
Drivers	115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter
EQ	No
Inputs	Wifi, USB-C, HDMI, Optical, Bluetooth
Output Power	100w RMS Per Speaker
Outputs	RCA Subwoofer
Sensitivity	84dB (measured at 0.3V/1m, Erin's Audio Corner)
Weight	15 lbs / 6.8 kg

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