Short answer: the Mackie MR524. It ranks #25 of 64 powered bookshelf speakers by sound quality at $380; the KEF LSX II LT ranks #27 and costs $469.99, so there is not much of a tradeoff to weigh.
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 Mackie MR524 offers: The available measurement stays within a 2.0dB reference band and reaches 46.2Hz at -3dB, 41.8Hz at -6dB, and 36.7Hz at -12dB. Its preference score is 4.30 without a subwoofer and 6.25 with one. It includes balanced XLR and TRS inputs, RCA, boundary compensation, high-frequency trim, and 50W of bi-amplification per speaker. Watch for: The low-quality Spinorama measurement shows a +0.47dB-per-octave on-axis rise, 1.158dB on-axis average absolute deviation, low 0.170 predicted-in-room smoothness, and a 3.61 sound-power directivity-index standard deviation. Output is also limited by the 5-inch woofer and 50W amplifier.
Buy the Mackie MR524. It ranks higher for sound quality than the KEF LSX II LT and costs less, so there is no real case for the other one.
Specifications Side By Side
| KEF LSX II LT | Mackie MR524 | |
|---|---|---|
| Price | $469.99 | $380/pair |
| Ranked | #27 of 64 in Medium Size Powered Bookshelf Speakers | #25 of 64 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) | - |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | Balanced XLR, balanced TRS, RCA |
| Outputs | RCA Subwoofer | - |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 5-inch polypropylene woofer; 1-inch silk-dome tweeter |
| Weight | 15 lbs / 6.8 kg | - |
| App | No | - |
| Bluetooth | No | - |
| EQ | No | - |
| Output Power | 100w RMS Per Speaker | 50W bi-amplified per speaker |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 46.2Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | approximately 38Hz (measured, spinorama.org) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Frequency Response | - | 45Hz-20kHz |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Edifier S1000W vs Dayton Audio M4
- Neumann KH80 DSP vs Dayton Audio M4
- Klipsch The Fives vs Dayton Audio M4
- KEF LSX II LT vs Kanto YU6
- KEF LSX II LT vs Audioengine A5+ Classic
Prices on this page were last checked August 25, 2026 at 6:19 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: $469.99 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
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Mackie MR524: $380/pair Bhphotovideo eBay
Pros: The available measurement stays within a 2.0dB reference band and reaches 46.2Hz at -3dB, 41.8Hz at -6dB, and 36.7Hz at -12dB. Its preference score is 4.30 without a subwoofer and 6.25 with one. It includes balanced XLR and TRS inputs, RCA, boundary compensation, high-frequency trim, and 50W of bi-amplification per speaker.
Cons: The low-quality Spinorama measurement shows a +0.47dB-per-octave on-axis rise, 1.158dB on-axis average absolute deviation, low 0.170 predicted-in-room smoothness, and a 3.61 sound-power directivity-index standard deviation. Output is also limited by the 5-inch woofer and 50W amplifier.
Full Mackie MR524 review and specifications →
| Bass Extension (-10dB) | approximately 38Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 46.2Hz (measured, spinorama.org) |
| Drivers | 5-inch polypropylene woofer; 1-inch silk-dome tweeter |
| Frequency Response | 45Hz-20kHz |
| Inputs | Balanced XLR, balanced TRS, RCA |
| Output Power | 50W bi-amplified per speaker |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons