Short answer: the HiVi Swans 3.1A Sehlin Sound Solutions mod. It ranks #98 of 223 bookshelf speakers by sound quality, rated 3.9/5, at $364.99; the Klipsch RP-600M II ranks #124, rated 3.7/5, and costs $449.99, so there is little reason to consider the other one.
The case for the Klipsch RP-600M II: Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals. 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 HiVi Swans 3.1A Sehlin Sound Solutions mod is the deeper-bass choice. An upgraded three-way DIY kit with smooth sound, wide dispersion and clean bass for a 6.5 inch woofer. Its bass reaches about 60Hz before falling 3dB, against 70Hz for the Klipsch RP-600M II. The tradeoff: Some directivity error appears around 2.1kHz on-axis.
Buy the HiVi Swans 3.1A Sehlin Sound Solutions mod. It is rated higher for sound quality than the Klipsch RP-600M II and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Passive Home rankings cover every ranked option.
Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals.
An upgraded three-way DIY kit with smooth sound, wide dispersion and clean bass for a 6.5 inch woofer.
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Specifications Side By Side
| Klipsch RP-600M II | HiVi Swans 3.1A Sehlin Sound Solutions mod | |
|---|---|---|
| Price | $449.99 per pair | $364.99 per pair for the kit (assembly required) |
| Ranked | #124 of 223 in Large Size Bookshelf Speakers | #98 of 223 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) | 16.5”H x 8.5”W x 13”D (420.0 x 215.0 x 330.0 mm) |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal, 3.8 ohms minimum (measured, Audio Science Review) |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) | 86.5dB (measured, Audio Science Review) |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn | 6.5” Kevlar woofer, 2” Dome midrange, 1” Soft Dome tweeter |
| Weight | 13 lbs (5.9 kg) each | 13.7 lbs (6.2 kg) |
| Woofer Cabinet | ported | ported, rear |
| Spinorama Preference Score | 5.64 | 5.8 (derived from ASR thread measurement data) |
| Spinorama Preference Score with Perfect Sub | 7.77 | 7.6 (derived from ASR thread measurement data) |
| DIY Kit | No | Yes |
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