Short answer: both are discontinued, so this only matters if you are buying used. Used, the Emotiva Airmotiv B2+ is the better pick: it ranks #185 of 222 bookshelf speakers by sound quality (rated 3.0/5), against #192 (rated 2.9/5) for the Klipsch RP-600M. If you want one new, the Emotiva Airmotiv XB2 replaces the Emotiva Airmotiv B2+ and is rated 4.2/5 at $549.
The Emotiva Airmotiv B2+ is the more accurate choice. A discontinued bookshelf speaker with a folded ribbon tweeter, punchy midbass and a 6.5 inch woofer with good output. Its measured preference score, a predictor of how neutral it sounds, is 5.60 against 3.66 for the Klipsch RP-600M. Watch for: The replacement B2+ did not deliver the neutral upgrade Erin expected.
The case for the Klipsch RP-600M: A discontinued Klipsch bookshelf speaker with a horn tweeter, consistent side to side dispersion and a sound that responds very well to EQ. The catch: A strong, annoying resonance in the lower vocal range around 300Hz stands out clearly (though it can be EQ’d out).
Buy the Emotiva Airmotiv B2+ only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, buy the Emotiva Airmotiv XB2, which replaces the Emotiva Airmotiv B2+.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Tonal accuracy above the bass: with a subwoofer taking the low end, the Emotiva Airmotiv B2+ scores 8.0 against 5.6 for the Klipsch RP-600M on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
- Close enough not to matter: bass extension (43 Hz vs 40 Hz, 10 dB down).
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Specifications Side By Side
| Emotiva Airmotiv B2+ | Klipsch RP-600M | |
|---|---|---|
| Price | $449 per pair Discontinued | $239.97 per pair Discontinued |
| Ranked | #185 of 222 in Large Size Bookshelf Speakers | #192 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 66Hz (measured, Erin’s Audio Corner) | 73Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured average, Erin’s Audio Corner) | 85.2dB (measured, Erin’s Audio Corner) |
| Drivers | 6.5” woven-fiber woofer, 32 x 25mm folded-ribbon tweeter | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Impedance | 4 ohms nominal (manufacturer specified) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Woofer Cabinet | ported, rear | ported |
| Spinorama Preference Score | 5.60 | 3.66 |
| Spinorama Preference Score with Perfect Sub | 7.96 | 5.61 |
| Dimensions | 12.8”H x 8.5”W x 11.5”D (324 x 216 x 293 mm) | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Weight | 15.7 lbs (7.1 kg) each | 16.1 lbs (7.3 kg) each |
| DIY Kit | No | No |
Where the Ratings Come From
- Emotiva Airmotiv B2+: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Klipsch RP-600M: Spinorama.org measurements and reviews by Erin’s Audio Corner, Audio Science Review 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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