Short answer: the ELAC Debut 2.0 B6.2. It ranks #149 of 222 bookshelf speakers by sound quality, rated 3.5/5, at $479. The GR-Research Klipsch RP-600M Upgrade ranks #179, rated 3.2/5, at $279, $200 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the ELAC Debut 2.0 B6.2: Large bookshelf speakers that play very loud with low distortion and decent bass, a solid budget choice. Watch for: A good size resonant peak around 700Hz stands out from an otherwise smooth response and lingers in cumulative spectral decay (waterfall) measurements: in one reviewer’s sighted A/B test, reducing it by about 5dB via EQ made a noticeable but not dramatic difference.
The case for the GR-Research Klipsch RP-600M Upgrade: A DIY crossover kit that fixes the main flaw of a popular Klipsch bookshelf speaker, with smoother sound and all new parts. The tradeoff: This is a DIY kit, not a finished speaker: you need a pair of the original Klipsch RP-600M, which is discontinued, and must rebuild both crossovers yourself.
Buy the ELAC Debut 2.0 B6.2. It is rated higher for sound quality, and the $200 you would save on the GR-Research Klipsch RP-600M Upgrade does not close the gap.
Looking for alternatives? See the complete Passive Home rankings.
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Specifications Side By Side
| ELAC Debut 2.0 B6.2 | GR-Research Klipsch RP-600M Upgrade | |
|---|---|---|
| Price | $479.00 per pair | $279 per pair |
| Ranked | #149 of 222 in Large Size Bookshelf Speakers | #179 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 40.0Hz (measured, spinorama.org ASR data) |
| Bass Extension (-3dB) | 64Hz (measured, Erin’s Audio Corner) | 68.8Hz (measured, spinorama.org ASR data) |
| Impedance | 6 ohms nominal, 5.2 ohms minimum (measured, Erin’s Audio Corner) | - |
| Sensitivity | 86.5dB (measured, Audio Science Review) | 86.7dB (measured, Audio Science Review) |
| Drivers | 25mm tweeter + 165mm woofer | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn (stock Klipsch RP-600M drivers) |
| Weight | 29.1 lbs (13.2 kg) | 16.1 lbs (7.3 kg) each |
| Dimensions | 14.8”H x 7.7”W x 10.6”D (375.0 x 195.0 x 268.0 mm) | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Woofer Cabinet | ported, front | ported |
| Spinorama Preference Score | 4.75 (spinorama.org) | 5.11 |
| Spinorama Preference Score with Perfect Sub | 7.0 (spinorama.org) | 7.06 |
| DIY Kit | No | Yes |
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