Short answer: KEF LSX II LT is a compact all-in-one listening system, while Edifier MR4 is the much simpler budget monitor. KEF’s coaxial driver provides a wide sweet spot, but its small cabinet limits clean loudness; the MR4 makes more sense when basic wired desktop sound is all you need.
On the KEF LSX II LT side: Its coaxial Uni-Q driver keeps the tweeter centered in the midrange, giving wide and consistent dispersion both horizontally and vertically, about ±60° each. That creates a broad sweet spot for multiple seats or positions. Set against that: Small drivers mean it is SPL-limited, with bass compression around 88 to 92dB/1m per speaker and multitone distortion crossing the reviewer’s 3% threshold around 96dB, so it is 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 wide dispersion and a premium compact system matter more than maximum volume.
Buy the Edifier MR4 if you want the economical, more straightforward wired-monitor option.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| KEF LSX II LT | Edifier MR4 | |
|---|---|---|
| Price | $479.99 per pair | $138.99 per pair |
| Ranked | #27 of 68 in Medium Size Powered Bookshelf Speakers | #49 of 68 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, 1” silk dome tweeter |
| Weight | 15 lbs (6.8 kg) | 9.9 lbs (4.5 kg) |
| App | No | No |
| Bluetooth | Yes | No |
| EQ | No | Yes (Monitor and Music modes) |
| Amplifier Power | 100w RMS Per Speaker | 42W RMS total (21W per speaker) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 79Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 59Hz (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) |
| Spinorama Preference Score | 4.81 | 3.25 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 6.00 |
| Subwoofer Output | Yes | - |
| XLR Input | No | No |
| RCA Input | No | Yes |
| TRS Input | No | Yes |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Headphone Output | - | Yes |
Related Speaker Comparisons
How KEF LSX II LT compares with other leading options:
- KEF LSX II LT vs Genelec 8331A
- KEF LSX II LT vs Neumann KH120 MKII
- Genelec 8030C vs KEF LSX II LT
- KEF LSX II LT vs Neumann KH80 DSP
- KEF LSX II LT vs Reflector Audio Square Two
Prices on this page were last checked October 2, 2026 at 10:18 PM 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: $479.99 per pair Amazon eBay
Pros: The coincident driver provides useful consistency across listening positions, and the app offers placement and subwoofer adjustments. Erin’s measurements give preference scores of 4.81 standalone and 7.03 with an ideal subwoofer, with -3dB bass around 56Hz. HDMI and USB connectivity make it convenient for a small TV or desktop system. Horizontal and vertical dispersion both reach about ±60°, giving a broad sweet spot for more than one seat. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 84dB.
Cons: The 3.4dB midrange response span and treble-region dips keep it below more neutral monitors. The existing review finds bass compression around 88-92dB/1m and rising distortion at higher levels, so the small drivers suit close listening rather than a large room. This LT version has no analog input; a turntable cannot plug straight into it.
Full KEF LSX II LT review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 100w RMS Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) |
| Bluetooth | Yes |
| Coaxial Input | 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 |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) |
| HDMI Input | Yes |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth |
| Optical Input | Yes |
| Outputs | RCA Subwoofer |
| RCA Input | No |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.81 |
| Spinorama Preference Score with Perfect Sub | 7.03 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | Yes |
| Weight | 15 lbs (6.8 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Transform Your Sound System with the KEF LSX II LT Speaker More from Erin’s Audio Corner →
- Erin’s Audio Corner Website: KEF LSX II LT
- Erin’s Audio Corner Measurements (spinorama.org)
- Jasper Tech: Best Desktop Computer Speakers for Every Budget – 2026 More from Jasper Tech →
- Jasper Tech: Best Bookshelf Speakers For TV & Gaming - 2025
- Jasper Tech: Best Powered Bookshelf Speakers for Every Budget - 2025
- Head-to-Head Comparisons
Edifier MR4: $138.99 per pair Amazon eBay
Pros: Erin’s data supports a useful budget desktop monitor: a 3.0dB midrange span, little overall on-axis tilt, and preference scores of 3.25 standalone and 6.00 with an ideal subwoofer. Balanced TRS inputs and tone controls are practical at its price, and its response is more balanced than the measured R1280T. Measured bass extension of 79Hz (-3dB), with a measured sensitivity of 78dB.
Cons: Bass reaches -3dB around 79Hz, so deep extension should not be inferred from the overall flat trend. Listening-window response still has local irregularities, including lower-treble unevenness. The existing review reports rapidly increasing distortion and audible distress when pushed well above moderate desktop levels. No Bluetooth, and adding a subwoofer does not cure every output or tonal limitation.
Full Edifier MR4 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 42W RMS total (21W per speaker) |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 59Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 79Hz (measured, Erin’s Audio Corner) |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 9”H x 5.5”W x 7.6”D (228.6 x 139.7 x 193 mm) |
| Drivers | 4” (102mm) woofer, 1” silk dome tweeter |
| EQ | Yes (Monitor and Music modes) |
| Frequency Response | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| HDMI Input | No |
| Headphone Output | Yes |
| Inputs | TRS Balanced, RCA, Aux |
| Optical Input | No |
| Outputs | Headphone |
| RCA Input | Yes |
| Sensitivity | 78dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 3.25 |
| Spinorama Preference Score with Perfect Sub | 6.00 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 9.9 lbs (4.5 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner Review Measurements More from Erin’s Audio Corner →
- Audio Science Review Measurements More from Audio Science Review →
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs Edifier R1280DBs sound.DEMO More from DSAUDIOreview →
- 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
- Erin’s Audio Corner Measurements (spinorama.org)
- Jasper Tech: Best Desktop Computer Speakers for Every Budget – 2026 More from Jasper Tech →
- Jasper Tech: Are the iLoud Micro Monitor Pro the Best Studio Monitor Speakers for your Home Studio?
- Erin’s Audio Corner: Edifier MR4 Powered Studio Monitors Review
- Head-to-Head Comparisons