Short answer: the AsciLab F6Bs. It ranks #20 of 222 bookshelf speakers by sound quality (rated 4.5/5); the ATC SCM19 ranks #209 (rated 2.4/5).
The AsciLab F6Bs is the more accurate choice. A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. Its measured preference score, a predictor of how neutral it sounds, is 5.24 against 4.61 for the ATC SCM19. Watch for: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
The ATC SCM19 is the deeper-bass option. Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance. Its bass reaches about 60Hz before falling 3dB, against 82Hz for the AsciLab F6Bs. Watch for: Some stored energy resonance around 500-700Hz, 4dB bump around 700Hz.
Buy the AsciLab F6Bs. It is rated higher for sound quality than the ATC SCM19.
Still deciding? The full Passive Home rankings cover every ranked option.
A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket.
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Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance.
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Specifications Side By Side
| AsciLab F6Bs | ATC SCM19 | |
|---|---|---|
| Price | €799 per pair | $3750 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #209 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | - |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | 5.9” Super Linear Magnet cone woofer, 1” soft dome tweeter |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 17.2”H x 10.4”W x 11.8”D (436.9 x 264.2 x 299.7 mm) |
| Weight | 12.3 lbs (5.6 kg) each | 39.2 lbs (17.8 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 85dB (measured, Audio Science Review) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | 6 ohms |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 60Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | 34Hz (measured, Audio Science Review) |
| Crossover Frequency | 1kHz | - |
| Mounting | VESA 100 wall mount compatible | - |
| Warranty | 2 years | - |
| Country | South Korea | - |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) | - |
| Spinorama Preference Score | 5.24 | 4.61 |
| Spinorama Preference Score with Perfect Sub | 7.90 | 7.03 |
| DIY Kit | No | No |
| Woofer Cabinet | - | sealed |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: AsciLab F6Bs (measured by Audio Science Review) and ATC SCM19 (measured by Audio Science Review), via spinorama.org.
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