Short answer: the KEF LSX II LT for better sound quality, the Edifier MR4 for the lower price. The KEF LSX II LT ranks #20 of 42 powered bookshelf speakers at $600. The Edifier MR4 ranks #23 at $169.99, $430.01 cheaper.
On the KEF LSX II LT side: 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. Set against that: 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.
What the Edifier MR4 gets right: More balanced than the R1280DB. The catch: No Bluetooth unlike other Edifier models.
Buy the KEF LSX II LT if sound quality matters more than the price. Buy the Edifier MR4 if the price matters more than sound quality.
Specifications Side By Side
| KEF LSX II LT | Edifier MR4 | |
|---|---|---|
| Price | $600.00 | $169.99 |
| Ranked | #20 of 42 in Medium Size Powered Bookshelf Speakers | #23 of 42 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"H x 5.5"W x 7.6"D (228.6 x 139.7 x 193 mm) |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | TRS Balanced, RCA, Aux |
| Outputs | RCA Subwoofer | Headphone |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 4" (102mm) woofer |
| Weight | 15 lbs / 6.8 kg | 9.9 lbs / 4.5 kg |
| App | No | No |
| Bluetooth | No | No |
| EQ | No | No |
| Output Power | 100w RMS Per Speaker | 42w RMS Per Speaker |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 109Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 58Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | 78dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Frequency Response | - | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
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More useful head-to-heads from the same speaker class:
- Vanatoo Transparent Zero Plus vs KRK Classic 5
- KRK Classic 5 vs Edifier S1000MKII
- Edifier S1000MKII vs Dayton Audio M4
- Edifier MR4 vs Edifier S1000W
- Neumann KH80 DSP vs Edifier MR4
The Two Speakers In Full
KEF LSX II LT: $600.00 Amazon
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 |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- KEF LSX II LT vs Presonus Eris E5
- KEF LSX II LT vs KRK Classic 5
- KEF LSX II LT vs JBL 705P
- KEF LSX II LT vs IK Multimedia iLoud MTM
- KEF LSX II LT vs Vanatoo Transparent One Encore Plus
- KEF LSX II LT vs IK Multimedia iLoud MTM MKII
- KEF LSX II LT vs Edifier R1280DB
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Edifier MR4: $169.99 Amazon
Pros: More balanced than the R1280DB. The value king. Impressively deep, flat bass down to 70Hz for such a small speaker, and its waveguide gives it unusually wide, consistent horizontal directivity for the price. Balanced XLR/TRS inputs are rare this cheap.
Cons: No Bluetooth unlike other Edifier models. Distortion climbs sharply above 86dB SPL, breaking into audible squealing near 96dB, and there’s a dip in the lower treble that needs a bit of EQ or the rear HF control to smooth out. Playback volume is limited with bass-heavy material - pushing it loud brings audible clicking/static.
Full Edifier MR4 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 58Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 109Hz (measured, Erin's Audio Corner) |
| Bluetooth | No |
| Dimensions | 9"H x 5.5"W x 7.6"D (228.6 x 139.7 x 193 mm) |
| Drivers | 4" (102mm) woofer |
| EQ | No |
| Frequency Response | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Inputs | TRS Balanced, RCA, Aux |
| Output Power | 42w RMS Per Speaker |
| Outputs | Headphone |
| Sensitivity | 78dB (measured at 0.3V/1m, Erin's Audio Corner) |
| Weight | 9.9 lbs / 4.5 kg |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner Review Measurements
- Audio Science Review Measurements
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Edifier R1280DBs sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Edifier R1700BT sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Presonus Eris E3.5 sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs iLoud Micro Monitor sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Presonus Eris E4.5 sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Mackie CR4-X sound.DEMO
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