Short answer: the Moondrop M4P MTM for a dedicated listening position, the KEF LS50 Meta for a more forgiving layout. The M4P MTM is an MTM two-way with dual 4-inch carbon-cone woofers flanking a 1-inch aluminum-magnesium dome tweeter crossed at 1.8kHz, but vertical placement is fussy: stay within about +/-20 degrees of the tweeter axis. The LS50 Meta’s Uni-Q adds F3 of 67Hz and F10 of 42Hz.
On the KEF LS50 Meta side: Uni-Q concentric driver mounts a 1” vented aluminum dome tweeter at the center of a 5.25” aluminum cone woofer, rated 79Hz-20kHz+. Set against that: F3 of 67Hz and F10 of 42Hz mean it doesn’t get much below 50Hz in-room.
The case for the Moondrop M4P MTM: MTM (mid-tweeter-mid) two-way layout with dual 4” carbon-cone woofers flanking a 1” aluminum-magnesium dome tweeter, crossed over at 1.8kHz. The tradeoff: Vertical placement is very fussy: staying within about ±20° of the tweeter axis is essential.
Buy the KEF LS50 Meta. It is rated higher for sound quality, and the $679 you would save on the Moondrop M4P MTM does not close the gap.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| KEF LS50 Meta | Moondrop M4P MTM | |
|---|---|---|
| Price | $1,599.00 per pair | $920 per pair |
| Ranked | #4 of 88 in Medium Size Bookshelf Speakers | #12 of 88 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) | 46Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 68Hz (measured, Erin's Audio Corner) | 69Hz (measured, Erin's Audio Corner) |
| Dimensions | 11.9"H x 7.9"W x 11"D (302 x 200 x 280.5 mm) | 15"H x 6.1"W x 7.3"D (380 x 155 x 185 mm) |
| Impedance | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin's Audio Corner) | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Sensitivity | 83dB (measured average, Erin's Audio Corner; 85dB manufacturer specified) | 85dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin's Audio Corner) |
| Drivers | 130 mm (5.25 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption tweeter | 2x 4" (87mm) carbon cone woofer, 1" (25mm) aluminum/magnesium dome tweeter |
| Weight | 17.2 lbs (7.8 kg) each | 13.7 lbs (6.2 kg) each |
| Woofer Cabinet | ported, rear | ported |
| Spinorama Preference Score | 5.74 | 5.05 |
| Spinorama Preference Score with Perfect Sub | 7.88 | 7.59 |
| DIY Kit | No | No |
| Crossover Frequency | - | 1800Hz |
| Power Handling | - | 75W rated / 150W max |
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The Two Speakers In Full
KEF LS50 Meta: $1,599.00 per pair Amazon Crutchfield eBay
Pros: Uni-Q concentric driver mounts a 1” vented aluminum dome tweeter at the center of a 5.25” aluminum cone woofer, rated 79Hz-20kHz+. Speaker-to-speaker matching measured tight at roughly 0.5dB deviation between the pair tested, versus 2-3dB seen on some other speakers - likely why imaging stayed so precise. Imaging stays tight and focused even toed out, unlike most coincident designs where toe-out typically diffuses the image, giving more of an oval-shaped soundstage than a hard rectangular boundary. Horizontal and vertical directivity both hold to about ±50° at the -6dB point, so tonality stays consistent across roughly a 100° listening cone. The extended bass shelf is deliberately tuned for near-wall/boundary placement rather than the usual “pull it 3 feet into the room” advice, playing lower without excess boominess when placed close to a wall. At $1,000 (a frequent sale price versus $1,600 list), called a no-brainer for a compact stand-mount speaker. Independent ASR Klippel measurements corroborate this: very good directivity with the on- and off-axis curves tracking closely, and a predicted in-room response the reviewer called “very close to ideal.”. Measured bass extension of 68Hz (-3dB), with a measured sensitivity of 83dB.
Cons: F3 of 67Hz and F10 of 42Hz mean it doesn’t get much below 50Hz in-room; a subwoofer is recommended for real bass. A 2-3dB scoop around 2-4kHz shows up in both the listening window and sound power measurements, matching a subjectively noticed lack of attack and vocal clarity that the reviewer wanted to correct with about 2dB of EQ. An on-axis diffraction dip around 8kHz smooths out with about 15° of toe-out (typical for concentric designs, but still present at 0°). Distortion is elevated at low frequencies since the single 5.25” cone shares surface area with the tweeter housing, reducing effective radiating area; multitone distortion crosses the 3% threshold at 96dB/1m, making roughly 88dB or below the safer output ceiling. Moderate sensitivity (~83dB average) needed 2-3dB more amplifier gain than typical in testing. Adding a subwoofer at an 80Hz crossover only helps lower-midrange distortion, not the elevated distortion in the 1-2kHz and above-5kHz regions. ASR’s own Klippel testing found the same pattern in starker terms: THD is very good at 86dB SPL/1m but climbs past 100% in the bass at 96dB SPL/1m, confirming this is not a near-field speaker for high-output bass-heavy material. Cumulative spectral decay (waterfall) also shows a couple of resonances lingering in the 1-2kHz region.
Full KEF LS50 Meta review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 68Hz (measured, Erin's Audio Corner) |
| DIY Kit | No |
| Dimensions | 11.9"H x 7.9"W x 11"D (302 x 200 x 280.5 mm) |
| Drivers | 130 mm (5.25 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption tweeter |
| Impedance | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin's Audio Corner) |
| Sensitivity | 83dB (measured average, Erin's Audio Corner; 85dB manufacturer specified) |
| Spinorama Preference Score | 5.74 |
| Spinorama Preference Score with Perfect Sub | 7.88 |
| Weight | 17.2 lbs (7.8 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Unveiling the KEF LS50 Meta: The Truth Behind the Hype More from Erin’s Audio Corner →
- Erin’s Audio Corner Website KEF LS50 Meta
- Audio Science Review KEF LS50 Meta More from Audio Science Review →
- GR-Research: KEF LS50 Meta! Worthy of HYPE? More from GR-Research →
- Erin’s Audio Corner: My Top Picks of 2023: Must-Haves Under $3000
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
- KEF LS50 Meta vs Ascend Sierra 1 v2
- KEF LS50 Meta vs Ascend Acoustics Luna V2 Mini-Monitor Ribbon
- KEF LS50 Meta vs Philharmonic Ceramic Mini
- KEF LS50 Meta vs XMechanik Mechano23 DIY
- KEF LS50 Meta vs Audio First Fidelia
- KEF LS50 Meta vs Ascend Acoustics HTM-200SE2
- KEF LS50 Meta vs Arendal 1961 Monitor
- KEF LS50 Meta vs SunAudio Purified 4
- See all 85 comparisons
Moondrop M4P MTM: $920 per pair Shenzhenaudio eBay
Pros: MTM (mid-tweeter-mid) two-way layout with dual 4” carbon-cone woofers flanking a 1” aluminum-magnesium dome tweeter, crossed over at 1.8kHz. Wide horizontal radiation of about ±60° through the midrange and still around ±50° near the tweeter, giving an expansive, enveloping soundstage on well-recorded stereo material. Noticeable mid-bass “thump” around 100-160Hz that adds a sense of punch and kick-drum impact, more pronounced than the reviewer’s Audiofirst Fidelia reference. Rolled-off, laid-back treble (roughly 1-2dB below linear) rather than the 2-5dB high-frequency boost common on speakers marketed as “detailed” - a plus for listeners who find brighter speakers fatiguing. Tonal balance stays consistent whether pointed straight on or toed out about 30°, so side-to-side seating position doesn’t change the sound much. At $920/pair in a compact monitor cabinet (13-14 lbs), reasonably priced for the format. Measured bass extension of 69Hz (-3dB), with a measured sensitivity of 85dB.
Cons: Vertical placement is very fussy: staying within about ±20° of the tweeter axis is essential, because the two woofers cancel each other through the crossover region (classic MTM lobing) - sit above or below that window and the upper midrange loses clarity and detail. SPL-limited: noticeable compression showed up both subjectively (thinner-sounding transients at 80-85dB/10 feet) and in measurements, with roughly 1.5dB of dynamic-range loss and about 3dB of added distortion under instantaneous compression testing. Harmonic distortion jumps substantially at 96dB versus 86dB (mostly second-order, so less audible than it looks on paper), and multitone distortion rides right at the reviewer’s 3% threshold at full output. Low impedance (3.7-ohm minimum, 1.7-ohm minimum EPDR) means a Class AB amp may run hot over longer sessions; a Class D amp is recommended for better thermal headroom. Designed primarily for nearfield use (about 1 meter); farfield listening is more of a gamble since dynamic range drops off noticeably at distance. Slight sibilance and a mild upper-midrange dip give a touch of a recessed, warm character alongside the bass emphasis. Bass reaches only about 50-60Hz in-room, and not with much volume before running into the SPL limits noted above.
Full Moondrop M4P MTM review and specifications →
| Bass Extension (-10dB) | 46Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 69Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 1800Hz |
| DIY Kit | No |
| Dimensions | 15"H x 6.1"W x 7.3"D (380 x 155 x 185 mm) |
| Drivers | 2x 4" (87mm) carbon cone woofer, 1" (25mm) aluminum/magnesium dome tweeter |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Power Handling | 75W rated / 150W max |
| Sensitivity | 85dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin's Audio Corner) |
| Spinorama Preference Score | 5.05 |
| Spinorama Preference Score with Perfect Sub | 7.59 |
| Weight | 13.7 lbs (6.2 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Moondrop M4P MTM vs Ascend Acoustics Luna V2 Mini-Monitor Titan
- Moondrop M4P MTM vs Arendal 1961 Monitor
- Moondrop M4P MTM vs Klipsch RP-500M II
- Moondrop M4P MTM vs Ascend Sierra 1 v2
- Moondrop M4P MTM vs Wharfedale Diamond 12.1
- Moondrop M4P MTM vs Radiant Acoustics Clarity 4.2
- Moondrop M4P MTM vs KEF Q150
- Moondrop M4P MTM vs JBL Studio 530
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