Short answer: the Perlisten S4b. It ranks #2 of 222 bookshelf speakers by sound quality (rated 4.8/5); the AsciLab F6Bs ranks #20 (rated 4.5/5).
The case for the AsciLab F6Bs: A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price. The catch: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
The case for the Perlisten S4b: A compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume. The catch: 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 Perlisten S4b. It is rated higher for sound quality than the AsciLab F6Bs.
Looking for alternatives? See the complete Passive Home rankings.
A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| AsciLab F6Bs | Perlisten S4b | |
|---|---|---|
| Price | €799 per pair | $8,000 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | - |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 16.5”H x 9.4”W x 7.3”D |
| Weight | 12.3 lbs (5.6 kg) each | 24.3 lbs (11 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 78Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | 40Hz (measured, Erin’s Audio Corner) |
| 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 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 7.90 | 8.01 |
| DIY Kit | No | No |
| Woofer Cabinet | - | sealed |
Related Speaker Comparisons
More top alternatives to Perlisten S4b: