Short answer: the KEF LS50 Meta. It ranks #4 of 179 bookshelf speakers by sound quality, rated 4.5/5, at $1,599.99; the Amphion Argon1 ranks #41, rated 3.8/5, and costs $1,919, so there is not much of a tradeoff to weigh.
The KEF LS50 Meta is the more accurate choice. 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 4.79 for the Amphion Argon1. 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.
The Amphion Argon1 is the deeper-bass choice. Compact Finnish bookshelf speakers with a titanium tweeter and aluminum woofer in a solidly built two way ported cabinet. Its bass reaches about 55.3Hz before falling 3dB, against 68Hz for the KEF LS50 Meta. Watch for: The independent measurement tells a rougher story than the reviews suggest: on-axis deviation of 0.896dB and on-axis smoothness of just 0.154, with a moderate -0.11dB per octave downward tilt, consistent with a deliberately voiced rather than neutral-flat tuning.
Buy the KEF LS50 Meta. It is rated higher for sound quality than the Amphion Argon1 and costs less, so only choose the other one for a particular feature it does better.
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.
Compact Finnish bookshelf speakers with a titanium tweeter and aluminum woofer in a solidly built two way ported cabinet.
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Specifications Side By Side
| KEF LS50 Meta | Amphion Argon1 | |
|---|---|---|
| Price | $1,599.99 per pair | $1,919 per pair |
| Ranked | #4 of 179 in Medium Size Bookshelf Speakers | #41 of 179 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 41.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 68Hz (measured, Erin’s Audio Corner) | 55.3Hz (measured, spinorama.org) |
| Dimensions | 11.9”H x 7.9”W x 11”D (302 x 200 x 280.5 mm) | 12.4”H x 6.3”W x 10.4”D (316 x 160 x 265 mm) |
| Impedance | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 8 ohms |
| Sensitivity | 83dB (measured average, Erin’s Audio Corner; 85dB manufacturer specified) | 86dB |
| Drivers | 130 mm (5.25 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption tweeter | 1” titanium dome tweeter, 5.25” aluminum woofer |
| Weight | 17.2 lbs (7.8 kg) each | 15.4 lbs (7 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.74 | 4.79 |
| Spinorama Preference Score with Perfect Sub | 7.88 | 7.01 |
| DIY Kit | No | No |
| Enclosure | - | 2-way, ported |
| Frequency Response | - | 45-25,000Hz (-6dB) |
| Country | - | Finland |
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