Short answer: the KEF Q Concerto Meta. It ranks #11 of 222 bookshelf speakers by sound quality, rated 4.6/5, at $1,399.99; the ATC SCM19 ranks #209, rated 2.4/5, and costs $3,750, so there is not much of a tradeoff to weigh.
The KEF Q Concerto Meta is the more accurate, deeper-bass option. A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack. Its measured preference score, a predictor of how neutral it sounds, is 6.01 against 4.61 for the ATC SCM19. Its bass reaches about 53Hz before falling 3dB, against 60Hz for the ATC SCM19. The tradeoff: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
The case for the ATC SCM19: A heavy, sealed pro style ATC bookshelf speaker with a very dense cabinet and low distortion at high volume. The tradeoff: Some stored energy resonance around 500-700Hz, 4dB bump around 700Hz.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality than the ATC SCM19 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Passive Home rankings.
A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack.
A heavy, sealed pro style ATC bookshelf speaker with a very dense cabinet and low distortion at high volume.
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Specifications Side By Side
| KEF Q Concerto Meta | ATC SCM19 | |
|---|---|---|
| Price | $1,399.99 per pair | $3750 per pair |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #209 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 34Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 17.2”H x 10.4”W x 11.8”D (436.9 x 264.2 x 299.7 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 6 ohms |
| Drivers | 165 mm (6.5 in.) hybrid aluminium cone woofer, 100 mm (4 in.) aluminium cone midrange, 19 mm (0.75 in.) vented aluminium dome with MAT tweeter | 5.9” Super Linear Magnet cone woofer, 1” soft dome tweeter |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85dB (measured, Audio Science Review) |
| Weight | 20.9 lbs (9.5 kg) each | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | ported, rear | sealed |
| Spinorama Preference Score | 6.01 | 4.61 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 7.03 |
| DIY Kit | No | No |
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