Short answer: the Perlisten S4b if sound quality matters most, the Klipsch RP-600M II if price matters most. The Perlisten S4b ranks #2 of 222 bookshelf speakers, rated 4.8/5, at $8,000. The Klipsch RP-600M II ranks #123, rated 3.7/5, at $449.99, $7,550.01 cheaper.
The Klipsch RP-600M II is the deeper-bass pick. Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals. Its bass reaches about 70Hz before falling 3dB, against 78Hz for the Perlisten S4b. The catch: On-axis, the treble runs notably hot (even hotter than the original Klipsch RP-600M in some respects) and needs about 20° of toe-out or the grille installed to sound balanced.
The Perlisten S4b is the better-sounding option. 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 Klipsch RP-600M II 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.
Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals.
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
| Klipsch RP-600M II | Perlisten S4b | |
|---|---|---|
| Price | $449.99 per pair | $8,000 per pair |
| Ranked | #123 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 78Hz (measured, Erin’s Audio Corner) |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) | 16.5”H x 9.4”W x 7.3”D |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Weight | 13 lbs (5.9 kg) each | 24.3 lbs (11 kg) each |
| Woofer Cabinet | ported | sealed |
| Spinorama Preference Score | 5.64 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 7.77 | 8.01 |
| DIY Kit | No | No |
Related Speaker Comparisons
How Perlisten S4b compares with other leading options: