Short answer: the AsciLab C6B. It ranks #6 of 222 bookshelf speakers by sound quality, rated 4.7/5, at $1,145. The SVS Prime Bookshelf ranks #150, rated 3.5/5, at $699, $446 cheaper, not enough of a saving to outweigh the sound-quality gap.
The AsciLab C6B is the more accurate, deeper-bass option. Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator. Its measured preference score, a predictor of how neutral it sounds, is 6.33 against 5.17 for the SVS Prime Bookshelf. Its bass reaches about 54Hz before falling 3dB, against 72Hz for the SVS Prime Bookshelf. Watch for: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
Why pick the SVS Prime Bookshelf: Reasonable sensitivity for the price at about 87dB, and the 6.5” woofer sits in its own dedicated sealed sub-compartment inside the cabinet for cleaner midrange/bass separation. The tradeoff: A scooped mid-range paired with a boosted upper mid-range creates an audibly uneven tonal balance, and there’s an additional dip in the treble around 4-5kHz that reads as slightly tinny relative to the recessed mid-range.
Buy the AsciLab C6B. It is rated higher for sound quality, and saving $446 with the SVS Prime Bookshelf does not make up for the sound-quality gap.
Still deciding? The full Passive Home rankings cover every ranked option.
Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator.
Ascilab $1145 eBay
Reasonable sensitivity for the price at about 87dB, and the 6.5” woofer sits in its own dedicated sealed sub-compartment inside the cabinet for cleaner midrange/bass separation.
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Specifications Side By Side
| AsciLab C6B | SVS Prime Bookshelf | |
|---|---|---|
| Price | $1145 per pair | $699.00 per pair |
| Ranked | #6 of 222 in Large Size Bookshelf Speakers | #150 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 49Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 54Hz (measured, Erin’s Audio Corner) | 72Hz (measured, Erin’s Audio Corner) |
| Dimensions | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) | 13.2”H x 8”W x 10.2”D (335.3 x 203.2 x 259.1 mm) |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) | 87dB (measured average, Erin’s Audio Corner) |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter | 6.5” polypropylene cone woofer with aluminum shorting ring (sealed sub-compartment), 1” aluminum dome tweeter |
| Weight | 18.5 lbs (8.4 kg) each | 15.5 lbs (7.03 kg) each |
| Woofer Cabinet | passive radiator | - |
| Spinorama Preference Score | 6.33 | 5.17 |
| Spinorama Preference Score with Perfect Sub | 8.28 | 7.78 |
| DIY Kit | No | No |
| Frequency Response | - | 48Hz - 25kHz ±3dB (manufacturer specified) |
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 C6B (measured by Erin’s Audio Corner) and SVS Prime Bookshelf (measured by Erin’s Audio Corner), via spinorama.org.
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