Short answer: the IK Multimedia iLoud MTM MKII for better sound quality, the KEF LSX II LT for the lower price. The IK Multimedia iLoud MTM MKII ranks #16 of 42 powered bookshelf speakers at $799.99. The KEF LSX II LT ranks #20 at $600, $199.99 cheaper.
The case for the IK Multimedia iLoud MTM MKII: Compact MTM layout (two 3.5” midwoofers flanking a 1” tweeter) powered monitor rated at 100W per speaker with XLR input, sold as a pair with an ARC room-correction microphone included. The tradeoff: Native treble tuning still runs about 3dB hot on-axis; the back-panel -3dB treble switch overcorrects, and roughly -1.5dB via external EQ works better.
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.
Buy the IK Multimedia iLoud MTM MKII if sound quality matters more than the price. Buy the KEF LSX II LT if the price matters more than sound quality.
Specifications Side By Side
| IK Multimedia iLoud MTM MKII | KEF LSX II LT | |
|---|---|---|
| Price | $799.99 | $600.00 |
| Ranked | #16 of 42 in Medium Size Powered Bookshelf Speakers | #20 of 42 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 10.4"H x 5.1"W x 6.3"D (264.2 x 129.5 x 160 mm) | 9.5"H x 6.1"W x 7.1"D (241.3 x 154.9 x 180.3 mm) |
| Frequency Response | 48 Hz - 28 kHz (±2dB) (Manufacturer specified) | - |
| Inputs | XLR | Wifi, USB-C, HDMI, Optical, Bluetooth |
| Drivers | 2x 3.5" (89mm) woofers, 1" silk dome tweeter | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter |
| App | Yes (X-MONITOR speaker emulation) | No |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | No |
| Output Power | 100w Per Speaker | 100w RMS Per Speaker |
| Weight | 5.5 lbs / 2.5 kg (5.5 lbs) each | 15 lbs / 6.8 kg |
| Max SPL | 112.5dB peak | - |
| Outputs | - | RCA Subwoofer |
| Bass Extension (-3dB) | - | 55Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | - | 46Hz (measured, Erin’s Audio Corner) |
| Sensitivity | - | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) |
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- IK Multimedia iLoud MTM vs Neumann KH80 DSP
- IK Multimedia iLoud MTM vs Edifier S2000MKIII
- IK Multimedia iLoud MTM vs KEF LSX II LT
- Neumann KH80 DSP vs IK Multimedia iLoud MTM MKII
The Two Speakers In Full
IK Multimedia iLoud MTM MKII: $799.99 Amazon
Pros: Compact MTM layout (two 3.5” midwoofers flanking a 1” tweeter) powered monitor rated at 100W per speaker with XLR input, sold as a pair with an ARC room-correction microphone included. Well-suited to nearfield desktop use, with linearity good enough for mixing or mastering. The bundled auto room-correction mic is genuinely effective - in testing it resolved specific room resonance peaks around 150Hz and 220Hz, making the midrange sound noticeably more lifelike. Back-panel switches allow desktop vs. free-field placement plus treble and bass trim. Harmonic distortion is good at a moderate 86dB output, appropriate for a speaker of this size.
Cons: Native treble tuning still runs about 3dB hot on-axis; the back-panel -3dB treble switch overcorrects, and roughly -1.5dB via external EQ works better. Vertical MTM lobing means staying within about 20-25° of the tweeter axis, or the upper-midrange to treble transition suffers significant suckout - the speaker should never be laid on its side unless the tweeter is pointed directly at the listener, or comb filtering results. Bass falls off sharply below its F3 of 51Hz (F10 45Hz), so a subwoofer is needed for anything lower. Multitone distortion rises sharply at 96dB/1m, and the reviewer recommends not exceeding about 86dB for extended listening at any distance - broadband output for the pair tops out around 94dB at 1 meter, with dynamic range essentially collapsing approaching 102dB. Horizontal directivity narrows with frequency rather than staying constant. Adding a subwoofer with an 80Hz crossover doesn’t meaningfully improve the distortion headroom, even though it does extend the low end.
Full IK Multimedia iLoud MTM MKII review and specifications →
| App | Yes (X-MONITOR speaker emulation) |
|---|---|
| Bluetooth | No |
| Dimensions | 10.4"H x 5.1"W x 6.3"D (264.2 x 129.5 x 160 mm) |
| Drivers | 2x 3.5" (89mm) woofers, 1" silk dome tweeter |
| EQ | Yes (Room adjustment) |
| Frequency Response | 48 Hz - 28 kHz (±2dB) (Manufacturer specified) |
| Inputs | XLR |
| Max SPL | 112.5dB peak |
| Output Power | 100w Per Speaker |
| Weight | 5.5 lbs / 2.5 kg (5.5 lbs) each |
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- Links
- Reviews, Comparisons and Sound Samples
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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 |
As an eBay Partner, we may be compensated if you make a purchase.
- 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
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- KEF LSX II LT vs IK Multimedia iLoud MTM
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