Short answer: the Klipsch RP-600M II. It ranks #114 of 203 bookshelf speakers by sound quality (rated 3.7/5) at $449.99 and is still sold new; the Revel Performa M22 ranks #151 (rated 3.3/5) and is discontinued, so it is only an option used.
The Klipsch RP-600M II is the better-sounding choice. Redesigned waveguide extends flush to the baffle edge, reducing diffraction compared to the original RP-600M. The catch: On-axis, the treble runs notably hot (even hotter than the original RP-600M in some respects) and needs about 20° of toe-out or the grille installed to sound balanced.
The Revel Performa M22 is the deeper-bass choice. Very flat frequency response from 200Hz to 10kHz. Its bass reaches about 46.9Hz before falling 3dB, against 70Hz for the Klipsch RP-600M II. The tradeoff: 3dB bass boost around 100Hz.
Buy the Klipsch RP-600M II. It is rated higher for sound quality, and the Revel Performa M22 is discontinued, so it is only available used.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Klipsch RP-600M II | Revel Performa M22 | |
|---|---|---|
| Price | $449.99 per pair | $600 per pair used (about), Discontinued |
| Ranked | #114 of 203 in Large Size Bookshelf Speakers | #151 of 203 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | 37.1Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 46.9Hz (measured, Audio Science Review) |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) | 14.5”H x 8.6”W x 11.9”D (368.3 x 219.1 x 301.6 mm) |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) | 85dB |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn | 25mm tweeter + 200mm woofer |
| Weight | 13 lbs (5.9 kg) each | 41.7 lbs (18.9 kg) |
| Woofer Cabinet | ported | ported, rear |
| Spinorama Preference Score | 5.64 | 5.31 |
| Spinorama Preference Score with Perfect Sub | 7.77 | 7.26 |
| DIY Kit | No | No |
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The Two Speakers In Full
Klipsch RP-600M II: $449.99 per pair Amazon eBay
Older model: the Klipsch RP-600M (ranked lower, rated 2.9/5).
Same family: the Klipsch RP-500M II (smaller bookshelf, rated 4/5), the Klipsch RP-5000F II (smallest floorstanding, rated 4/5), the Klipsch RP-6000F II (floorstanding, rated 3.9/5), the Klipsch RP-8000F II (largest floorstanding, rated 3.9/5), the Klipsch RP-404C II (smallest center, rated 3.7/5), the Klipsch RP-500C II (center, rated 3.9/5) and the Klipsch RP-504C II (largest center, rated 3.8/5).
Pros: Redesigned waveguide extends flush to the baffle edge, reducing diffraction compared to the original RP-600M. Roughly 10-20° wider horizontal radiation than the original, giving more soundstage envelopment while retaining precise imaging. A major step up in overall tonal neutrality compared to the original RP-600M, largely eliminating that model’s midrange resonance issues. Unusually, sounds better with the grille on: the grille smooths out the elevated treble rather than degrading the sound, a rare trait among speakers the reviewer has tested. More refined back-panel hardware, including anodized binding posts and jumper cables for optional bi-amping. Responds well to EQ correction (verified using measurement software and a miniDSP), letting the on-axis response be made genuinely linear. Measured bass extension of 70Hz (-3dB), with a measured sensitivity of 86dB.
Cons: On-axis, the treble runs notably hot (even hotter than the original RP-600M in some respects) and needs about 20° of toe-out or the grille installed to sound balanced. Horizontal dispersion is very slightly less linear across angles than the original RP-600M, a minor trade-off for the wider overall radiation pattern. Klipsch’s marketed sensitivity (about 94.5dB) is, like the original, a half-space rating roughly 9dB above the anechoic reality (closer to 85-86dB). In-room bass rolls off around 60Hz in practice, and a 120Hz boost paired with a midrange scoop gives kick drums their “tambour” without real low-end weight: a subwoofer is still recommended. Vertical listening tolerance is limited to about ±10° from the tweeter axis. Toeing the speaker out for better on-axis tonality (rather than using the grille) introduces slightly more diffuse imaging from added sidewall reflections.
Full Klipsch RP-600M II review and specifications →
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.64 |
| Spinorama Preference Score with Perfect Sub | 7.77 |
| Weight | 13 lbs (5.9 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: The Truth about Klipsch’s “NEW” Sound. RP-600M Update. More from Erin’s Audio Corner →
- Erin’s Audio Corner Website Klipsch RP-600M II
- GR-Research: We Bought The "NEW" RP-600M II Is KLIPSCH Listening?! More from GR-Research →
- Erin’s Audio Corner: 5 AWESOME SPEAKERS Under $1000 You Won’t Regret
- Erin’s Audio Corner Measurements (spinorama.org)
- Erin’s Audio Corner: KEF Q1 Meta vs Emotiva vs Klipsch | The Real Differences
- Head-to-Head Comparisons
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- Klipsch RP-600M II vs Dynaudio Emit 20
- Klipsch RP-600M II vs MoFi SourcePoint 10 Master Edition
- Klipsch RP-600M II vs Philharmonic BMR Monitor
- See all 118 comparisons
Revel Performa M22: $600 per pair used (about) Discontinued eBay
Same family: the Revel Performa C52 (center, rated 4/5).
Pros: Very flat frequency response from 200Hz to 10kHz. Distortion is well controlled through most of the range, with only a modest crossover-region bump around 2-4kHz. Measured bass extension of 46.9Hz (-3dB).
Cons: 3dB bass boost around 100Hz. On-axis response also droops below 150Hz and peaks above 4kHz, which the reviewer thought may sound a bit bright/light. Distortion rises substantially below 100Hz when driven hard. Discontinued.
Full Revel Performa M22 review and specifications →
| Bass Extension (-10dB) | 37.1Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 46.9Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 14.5”H x 8.6”W x 11.9”D (368.3 x 219.1 x 301.6 mm) |
| Drivers | 25mm tweeter + 200mm woofer |
| Impedance | 4 ohms |
| Sensitivity | 85dB |
| Spinorama Preference Score | 5.31 |
| Spinorama Preference Score with Perfect Sub | 7.26 |
| Weight | 41.7 lbs (18.9 kg) |
| Woofer Cabinet | ported, rear |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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