Short answer: the KEF LS50 Meta on measured sound quality, the PSB Alpha P3 on price. The KEF LS50 Meta ranks #4 of 179 bookshelf speakers, rated 4.5/5, at $1,599.99. The PSB Alpha P3 ranks #88, rated 3.3/5, at $349, $1,250.99 cheaper.
The KEF LS50 Meta is the more accurate option. An iconic compact KEF speaker with highly accurate sound, pinpoint imaging and a coaxial driver that keeps tone even across the room. Its measured preference score, a predictor of how neutral it sounds, is 5.74 against 3.12 for the PSB Alpha P3. The catch: F3 of 67Hz and F10 of 42Hz mean it doesn’t get much below 50Hz in-room; a subwoofer is recommended for real bass.
What the PSB Alpha P3 does well: Very compact bookshelf speakers with magnetic grilles and surprisingly deep bass for their size, sensible for small rooms. The tradeoff: Low measured sensitivity around 81dB restricts clean output and asks more of the amplifier.
Buy the KEF LS50 Meta if sound quality matters more than the price. Buy the PSB Alpha P3 if the price matters more than sound quality.
Looking for alternatives? See the complete Passive Home rankings.
An iconic compact KEF speaker with highly accurate sound, pinpoint imaging and a coaxial driver that keeps tone even across the room.
Very compact bookshelf speakers with magnetic grilles and surprisingly deep bass for their size, sensible for small rooms.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| KEF LS50 Meta | PSB Alpha P3 | |
|---|---|---|
| Price | $1,599.99 per pair | $349.00 per pair |
| Ranked | #4 of 179 in Medium Size Bookshelf Speakers | #88 of 179 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 51.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 68Hz (measured, Erin’s Audio Corner) | 63.0Hz (measured, ASR via spinorama.org) |
| Dimensions | 11.9”H x 7.9”W x 11”D (302 x 200 x 280.5 mm) | 8.625H x 5.125W x 6.875D in |
| Impedance | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 8 ohms nominal, 4 ohms minimum |
| Sensitivity | 83dB (measured average, Erin’s Audio Corner; 85dB manufacturer specified) | 85dB specified |
| Drivers | 130 mm (5.25 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption tweeter | 0.75” aluminum-dome tweeter, 4” polypropylene woofer |
| Weight | 17.2 lbs (7.8 kg) each | 10.1 lbs (4.6 kg)/pair |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.74 | 3.12 |
| Spinorama Preference Score with Perfect Sub | 7.88 | 5.64 |
| DIY Kit | No | No |
| Enclosure | - | 2-way bass reflex |
| Frequency Response | - | 57Hz-21kHz |
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