Short answer: the Polk Signature Elite ES20. Both are rated 3.7/5 for sound quality (#119 and #123 of 222 bookshelf speakers), and the Polk Signature Elite ES20 costs $398.98 against $449.99 for the Klipsch RP-600M II, with sound quality a draw, the lower price decides it.
The RP-600M II measures more neutrally but needs careful setup. Its preference score is 5.64 against the ES20’s 4.49, and its horn tweeter gives precise imaging with wide dispersion. Its treble runs hot on-axis, so it needs about 20 degrees of toe-out or the grille fitted, and its bass rolls off around 70Hz (-3dB), so a subwoofer helps.
The ES20 has the deeper bass of the two. Its 6.5-inch polypropylene woofer reaches 55.7Hz before falling 3dB, with broad horizontal coverage of about 60 degrees each side. Its in-room smoothness and directivity are average rather than class-leading. The deep cabinet needs a large shelf or stand, and its rear port needs clearance from the wall.
Buy the Polk Signature Elite ES20. Both are rated the same for sound quality, and it costs $51.01 less than the Klipsch RP-600M II.
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.
Large, efficient bookshelf speakers with unusually deep bass for the price and wide horizontal coverage.
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
| Klipsch RP-600M II | Polk Signature Elite ES20 | |
|---|---|---|
| Price | $449.99 per pair | $398.98 per pair |
| Ranked | #123 of 222 in Large Size Bookshelf Speakers | #119 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 55.7Hz (measured, ASR via spinorama.org) |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) | 14.8H x 8.5W x 13.8D in |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4/8-ohm compatible |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) | 86dB |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn | 1” Terylene dome tweeter, 6.5” polypropylene woofer |
| Weight | 13 lbs (5.9 kg) each | 17 lbs (7.7 kg) each |
| Woofer Cabinet | ported | - |
| Spinorama Preference Score | 5.64 | 4.49 |
| Spinorama Preference Score with Perfect Sub | 7.77 | 6.44 |
| DIY Kit | No | No |
| Enclosure | - | 2-way, Power Port bass-reflex |
| Country | - | United States (design) |
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