Short answer: the KEF LS50 Meta on measured sound quality, the Klipsch RP-500M on price. The KEF LS50 Meta ranks #4 of 87 bookshelf speakers at $1599. The Klipsch RP-500M ranks #41 at $299, $1300 cheaper.
What the KEF LS50 Meta offers: 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.” Watch for: 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.
What the Klipsch RP-500M offers: The original Reference Premiere 2-way bookshelf, still sold new alongside the newer RP-500M II at a lower price. Klipsch’s signature Hybrid Tractrix Horn tweeter loading is unmistakable and the price has dropped from its original $579/pair MSRP to roughly $399/pair. Watch for: Independently measured by Erin’s Audio Corner with a very rough response: on-axis deviation of 0.961dB and on-axis smoothness of just 0.216, well behind the revised tuning Klipsch gave the newer RP-500M II. Directivity-index standard deviation of 4.24, a pronounced +0.26dB per octave upward tilt, and a predicted in-room smoothness of just 0.16, the worst of any speaker measured here, all point to an inconsistent, brighter-leaning presentation. Full sensitivity and impedance specs aren’t published on Klipsch’s own product page.
Buy the KEF LS50 Meta if sound quality matters more than the price. Buy the Klipsch RP-500M if the price matters more than sound quality.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| KEF LS50 Meta | Klipsch RP-500M | |
|---|---|---|
| Price | $1,599.00 per pair | $299.00 per pair |
| Ranked | #4 of 87 in Medium Size Bookshelf Speakers | #41 of 87 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) | - |
| Bass Extension (-3dB) | 68Hz (measured, Erin's Audio Corner) | - |
| Dimensions | 11.9"H x 7.9"W x 11"D (302 x 200 x 280.5 mm) | 13.50H x 6.81W x 9.50D in |
| 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) | - |
| Drivers | 130 mm (5.25 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption tweeter | 1" Titanium LTS tweeter (Hybrid Tractrix Horn), 5.25" Spun Copper Cerametallic woofer |
| Weight | 17.2 lbs (7.8 kg) each | - |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 4.88 | 3.59 |
| Spinorama Preference Score with Perfect Sub | 7.02 | 6.21 |
| Enclosure | - | 2-way, ported |
| Country | - | United States (Klipsch design) |
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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) |
| 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 | 4.88 |
| Spinorama Preference Score with Perfect Sub | 7.02 |
| 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
Klipsch RP-500M: $299.00 per pair Amazon eBay
Pros: The original Reference Premiere 2-way bookshelf, still sold new alongside the newer RP-500M II at a lower price. Klipsch’s signature Hybrid Tractrix Horn tweeter loading is unmistakable and the price has dropped from its original $579/pair MSRP to roughly $399/pair.
Cons: Independently measured by Erin’s Audio Corner with a very rough response: on-axis deviation of 0.961dB and on-axis smoothness of just 0.216, well behind the revised tuning Klipsch gave the newer RP-500M II. Directivity-index standard deviation of 4.24, a pronounced +0.26dB per octave upward tilt, and a predicted in-room smoothness of just 0.16, the worst of any speaker measured here, all point to an inconsistent, brighter-leaning presentation. Full sensitivity and impedance specs aren’t published on Klipsch’s own product page.
Full Klipsch RP-500M review and specifications →
| Country | United States (Klipsch design) |
|---|---|
| Dimensions | 13.50H x 6.81W x 9.50D in |
| Drivers | 1" Titanium LTS tweeter (Hybrid Tractrix Horn), 5.25" Spun Copper Cerametallic woofer |
| Enclosure | 2-way, ported |
| Spinorama Preference Score | 3.59 |
| Spinorama Preference Score with Perfect Sub | 6.21 |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons