Short answer: the Perlisten S4b for better sound quality, the Emotiva Airmotiv XB2 for the lower price. The Perlisten S4b ranks #2 of 222 bookshelf speakers, rated 4.8/5, at $8,000. The Emotiva Airmotiv XB2 ranks #48, rated 4.2/5, at $549, $7,451 cheaper.
The Emotiva Airmotiv XB2 is the deeper-bass option. A great value bookshelf speaker with neutral sound, an AMT ribbon tweeter, and decent bass for its size. Its bass reaches about 62Hz before falling 3dB, against 78Hz for the Perlisten S4b. Watch for: Slight recessed upper-midrange around 2kHz from the tweeter-to-woofer handoff.
The Perlisten S4b is the better-sounding choice. 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 Emotiva Airmotiv XB2 if the price is the priority over sound quality, or the Perlisten S4b if sound quality is the priority over the price.
Looking for alternatives? See the complete Passive Home rankings.
A great value bookshelf speaker with neutral sound, an AMT ribbon tweeter, and decent bass for its size.
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
| Emotiva Airmotiv XB2 | Perlisten S4b | |
|---|---|---|
| Price | $549 per pair | $8,000 per pair |
| Ranked | #48 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 62Hz (measured, Erin’s Audio Corner) | 78Hz (measured, Erin’s Audio Corner) |
| Dimensions | 12.8” x 8.5” x 11.5” (325 x 216 x 292 mm) | 16.5”H x 9.4”W x 7.3”D |
| Impedance | 4 ohms nominal (safe with 8-ohm rated amps) | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (2.83V/1m, Manufacturer specified) | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 1x 6” woven cone woofer, 1x 25x32mm AMT folded ribbon tweeter | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Weight | 18.1 lbs (8.2 kg) | 24.3 lbs (11 kg) each |
| Woofer Cabinet | Bass reflex, rear ported | sealed |
| Frequency Response | 48Hz - 27kHz (+3/-3dB, Manufacturer specified) | - |
| Crossover Frequency | 2.6kHz | - |
| Power Handling | 125W continuous, 200W peak | - |
| Spinorama Preference Score | 5.65 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 7.93 | 8.01 |
| DIY Kit | No | No |
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