Short answer: the Perlisten S4b on measured sound quality, the AsciLab C6B on price. The Perlisten S4b ranks #2 of 222 bookshelf speakers, rated 4.8/5, at $8,000. The AsciLab C6B ranks #6, rated 4.7/5, at $1,145, $6,855 cheaper.
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 5.35 for the Perlisten S4b. Its bass reaches about 54Hz before falling 3dB, against 78Hz for the Perlisten S4b. The catch: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
What the Perlisten S4b does well: A compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume. Watch for: Erin measured only 84.5dB sensitivity and an impedance minimum just under 4 ohms, a difficult efficiency/load combination that deserves substantial clean amplification.
Buy the AsciLab C6B if the price is the priority over sound quality, or the Perlisten S4b if sound quality is the priority over the price.
Still deciding? The full Passive Home rankings cover every ranked option.
Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position.
A compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume.
Prices on this page were last checked October 31, 2026 at 7:11 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| AsciLab C6B | Perlisten S4b | |
|---|---|---|
| Price | $1145 per pair | $8,000 per pair |
| Ranked | #6 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 54Hz (measured, Erin’s Audio Corner) | 78Hz (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) | 16.5”H x 9.4”W x 7.3”D |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Weight | 18.5 lbs (8.4 kg) each | 24.3 lbs (11 kg) each |
| Woofer Cabinet | passive radiator | sealed |
| Spinorama Preference Score | 6.33 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 8.28 | 8.01 |
| DIY Kit | No | No |
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