Short answer: the Genelec 8020D for better sound quality, the KEF LSX II LT for the lower price. The Genelec 8020D ranks #6 of 58 powered bookshelf speakers at $1100. The KEF LSX II LT ranks #27 at $600, $500 cheaper.
What the KEF LSX II LT offers: 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. Watch for: 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.
What the Genelec 8020D offers: Klippel-based spinorama measurements show a flat, well-behaved on-axis response from about 60Hz to 10kHz, with listening-window and early-reflections curves tracking closely together - a sign of well-controlled directivity. Horizontal directivity holds tight out to about ±30 degrees before starting to narrow. Applying EQ correction visibly closes the gap between the on-axis and predicted in-room curves, raising the calculated on-axis preference score from 5.4 to 6.4 and the in-room score from 5.6 to 6.6 - a straightforward, worthwhile tuning target for anyone using it with room correction. Watch for: Sound power rolls off starting around 500Hz-1kHz as the small 4.1” woofer/tweeter pair begins to beam, a typical trait of small nearfield monitors at this price. Off-axis response (measured out to 90 degrees) narrows noticeably above 1kHz, so off-center listening loses top-end energy. High price for the driver size.
Buy the KEF LSX II LT if the price matters more than sound quality. Buy the Genelec 8020D if sound quality matters more than the price.
Specifications Side By Side
| KEF LSX II LT | Genelec 8020D | |
|---|---|---|
| Price | $600.00 | $1100 |
| Ranked | #27 of 58 in Medium Size Powered Bookshelf Speakers | #6 of 58 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 9.5"H x 6.1"W x 7.1"D (241.3 x 154.9 x 180.3 mm) | 9.5"H x 5.8"W x 5.6"D (241.3 x 147.3 x 142.2 mm) |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | XLR |
| Outputs | RCA Subwoofer | - |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 4.1" woofer, 0.75" metal dome tweeter |
| Weight | 15 lbs / 6.8 kg | 7.1 lbs / 3.2 kg each |
| App | No | No |
| Bluetooth | No | No |
| EQ | No | Yes (Bass tilt, desk proximity) |
| Output Power | 100w RMS Per Speaker | 100W (50W woofer + 50W tweeter) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 56Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 50Hz (measured, Audio Science Review) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Frequency Response | - | 56 Hz - 25 kHz (-6 dB) (Manufacturer specified) |
| Max SPL | - | 103dB @ 1m |
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Prices on this page were last checked August 24, 2026 at 6:53 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
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.
Full KEF LSX II LT review and specifications →
| 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 |
- Links
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Genelec 8020D: $1100 Bhphotovideo eBay
Pros: Klippel-based spinorama measurements show a flat, well-behaved on-axis response from about 60Hz to 10kHz, with listening-window and early-reflections curves tracking closely together - a sign of well-controlled directivity. Horizontal directivity holds tight out to about ±30 degrees before starting to narrow. Applying EQ correction visibly closes the gap between the on-axis and predicted in-room curves, raising the calculated on-axis preference score from 5.4 to 6.4 and the in-room score from 5.6 to 6.6 - a straightforward, worthwhile tuning target for anyone using it with room correction.
Cons: Sound power rolls off starting around 500Hz-1kHz as the small 4.1” woofer/tweeter pair begins to beam, a typical trait of small nearfield monitors at this price. Off-axis response (measured out to 90 degrees) narrows noticeably above 1kHz, so off-center listening loses top-end energy. High price for the driver size.
Full Genelec 8020D review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 56Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Dimensions | 9.5"H x 5.8"W x 5.6"D (241.3 x 147.3 x 142.2 mm) |
| Drivers | 4.1" woofer, 0.75" metal dome tweeter |
| EQ | Yes (Bass tilt, desk proximity) |
| Frequency Response | 56 Hz - 25 kHz (-6 dB) (Manufacturer specified) |
| Inputs | XLR |
| Max SPL | 103dB @ 1m |
| Output Power | 100W (50W woofer + 50W tweeter) |
| Weight | 7.1 lbs / 3.2 kg each |
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- Reviews, Comparisons and Sound Samples
- Audio Science Review Measurements More from Audio Science Review →
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