Short answer: the KEF Q Concerto Meta if budget allows, the Klipsch RP-600M II if it doesn’t. The Q Concerto Meta ranks #11 of 222 large bookshelf speakers against the RP-600M II’s #123, and the price gap between them, $550, is large enough that the RP-600M II remains a legitimate budget pick rather than an also-ran.
The Q Concerto Meta’s standout trait is in-room consistency. Its reviewer calls out really good neutrality with directivity that stays remarkably steady from lower treble into upper treble, one of the reviewer’s own top 10 picks under $1,500. Its main limitation is a radiation pattern of about plus or minus 50 degrees, narrower than the reviewer’s preferred 60 degrees for maximum envelopment, and it wants to be pointed closer to on-axis rather than heavily toed out.
The RP-600M II is a real step up from the original RP-600M, but with a treble caveat. Its redesigned waveguide extends flush to the baffle edge to reduce diffraction, its horizontal radiation is 10 to 20 degrees wider than the original, and the reviewer notes it largely eliminates the original’s midrange resonance issues. The catch is that on-axis treble runs notably hot, even hotter than the original in some respects, and needs about 20 degrees of toe-out or the grille installed to sound balanced. Unusually, the reviewer found it actually sounds better with the grille on.
Bass extension favors the KEF. It reaches F3 53Hz and F10 35Hz against the Klipsch’s F3 70Hz and F10 41Hz, a meaningful difference for anyone running these without a subwoofer.
Buy the KEF Q Concerto Meta for the more consistent, deeper-reaching measured performance if the price fits your budget.
Buy the Klipsch RP-600M II if the price gap matters and you’re willing to toe it out or run the grille to tame its hot treble.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Bass depth: the KEF Q Concerto Meta reaches 35 Hz (10 dB down) against 41 Hz for the Klipsch RP-600M II, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Close enough not to matter: preference score with a subwoofer (7.7 vs 7.8).
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Specifications Side By Side
| KEF Q Concerto Meta | Klipsch RP-600M II | |
|---|---|---|
| Price | $999.99 per pair | $449.99 per pair |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #123 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 41Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 70Hz (measured, Erin’s Audio Corner) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Drivers | 165 mm (6.5 in.) hybrid aluminium cone woofer, 100 mm (4 in.) aluminium cone midrange, 19 mm (0.75 in.) vented aluminium dome with MAT tweeter | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 86dB (measured, Erin’s Audio Corner) |
| Weight | 20.9 lbs (9.5 kg) each | 13 lbs (5.9 kg) each |
| Woofer Cabinet | ported, rear | ported |
| Spinorama Preference Score | 6.01 | 5.64 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 7.77 |
| DIY Kit | No | No |
Where the Ratings Come From
- KEF Q Concerto Meta: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Klipsch RP-600M II: Spinorama.org measurements and reviews by Erin’s Audio Corner and GR-Research.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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