Short answer: the Perlisten S4b if sound quality matters most, the Triangle Borea BR03 if price matters most. The Perlisten S4b ranks #2 of 222 bookshelf speakers, rated 4.8/5, at $8,000. The Triangle Borea BR03 ranks #198, rated 2.8/5, at $399, $7,601 cheaper.
The Triangle Borea BR03 is the deeper-bass pick. A budget French bookshelf speaker with dual front ports, decent bass for the price and solid, well braced build quality. Its bass reaches about 57Hz before falling 3dB, against 78Hz for the Perlisten S4b. The tradeoff: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble, that the reviewer attributes to cabinet resonances and driver breakup rather than a deliberate voicing choice: it makes vocals and instruments sound recessed and thin rather than warm.
The Perlisten S4b is the more accurate pick. A compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume. Its measured preference score, a predictor of how neutral it sounds, is 5.35 against 4.03 for the Triangle Borea BR03. The tradeoff: 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 Triangle Borea BR03 when the price outweighs sound quality for you, and the Perlisten S4b when sound quality outweighs the price instead.
Want more options? Browse the full Passive Home rankings.
A budget French bookshelf speaker with dual front ports, decent bass for the price and solid, well braced build quality.
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
| Triangle Borea BR03 | Perlisten S4b | |
|---|---|---|
| Price | $399.00 per pair | $8,000 per pair |
| Ranked | #198 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Drivers | 6.5” natural cellulose midwoofer, 1” (25mm) EFS silk dome tweeter | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Crossover Frequency | 3600Hz | - |
| Dimensions | 14.96”H x 8.11”W x 12.36”D | 16.5”H x 9.4”W x 7.3”D |
| Weight | 13.2 lbs (6 kg) each | 24.3 lbs (11 kg) each |
| Impedance | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin’s Audio Corner) | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87.5dB (measured at 2.83V/1m, Erin’s Audio Corner) | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 57Hz (measured, Erin’s Audio Corner) | 78Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 42Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Recommended Power | 100W | - |
| Woofer Cabinet | ported, dual front ports | sealed |
| Spinorama Preference Score | 4.03 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 6.38 | 8.01 |
| DIY Kit | No | No |
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