Short answer: the AsciLab C6B. It ranks #6 of 222 bookshelf speakers by sound quality, rated 4.7/5, at $1,145; the ATC SCM19 ranks #209, rated 2.4/5, and costs $3,750, which makes this an easy call rather than a real tradeoff.
The AsciLab C6B is the more accurate, deeper-bass option. Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position. Its measured preference score, a predictor of how neutral it sounds, is 6.33 against 4.61 for the ATC SCM19. Its bass reaches about 54Hz before falling 3dB, against 60Hz for the ATC SCM19. The tradeoff: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
What the ATC SCM19 does well: 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 AsciLab C6B. It is rated higher for sound quality than the ATC SCM19 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Passive Home rankings.
Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position.
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
| AsciLab C6B | ATC SCM19 | |
|---|---|---|
| Price | $1145 per pair | $3750 per pair |
| Ranked | #6 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) | 54Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Dimensions | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 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, 2.6 ohms minimum (measured, Erin’s Audio Corner) | 6 ohms |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) | 85dB (measured, Audio Science Review) |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter | 5.9” Super Linear Magnet cone woofer, 1” soft dome tweeter |
| Weight | 18.5 lbs (8.4 kg) each | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | passive radiator | sealed |
| Spinorama Preference Score | 6.33 | 4.61 |
| Spinorama Preference Score with Perfect Sub | 8.28 | 7.03 |
| DIY Kit | No | No |
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