Short answer: the ELAC Debut 3.0 DB63. It ranks #49 of 222 bookshelf speakers by sound quality, rated 4.2/5, at $469.99. The GR-Research Klipsch RP-600M Upgrade ranks #179, rated 3.2/5, at $279, $190.99 cheaper, a saving that is not big enough to make up the sound-quality gap.
The ELAC Debut 3.0 DB63 is the better-sounding choice. An affordable bookshelf speaker with solid sound for the money, a spacious soundstage, and an easy load for any receiver. Watch for: A dip in the lower midrange (300-600Hz, about 1.5dB) reduces vocal warmth and can make voices sound slightly hollow.
Why pick 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 3.0 DB63. It is rated higher for sound quality, and the $190.99 saving on the GR-Research Klipsch RP-600M Upgrade is not enough to make up the difference.
Still deciding? The full Passive Home rankings cover every ranked option.
Measured Differences
- Close enough not to matter: bass extension (40 Hz vs 40 Hz, 10 dB down).
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Specifications Side By Side
| ELAC Debut 3.0 DB63 | GR-Research Klipsch RP-600M Upgrade | |
|---|---|---|
| Price | $469.99 per pair | $279 per pair |
| Ranked | #49 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) | 76Hz (measured, Erin’s Audio Corner) | 68.8Hz (measured, spinorama.org ASR data) |
| Dimensions | 13.3”H x 7.7”W x 11.7”D (337.8 x 195.6 x 297.2 mm) | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Impedance | 6 ohms nominal (4.4 ohms minimum, measured, Erin’s Audio Corner) | - |
| Sensitivity | 86.2dB (measured, Erin’s Audio Corner) | 86.7dB (measured, Audio Science Review) |
| Drivers | 6.5” Aramid Fiber woofer, 1” soft dome tweeter | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn (stock Klipsch RP-600M drivers) |
| Weight | 17.2 lbs (7.8 kg) each | 16.1 lbs (7.3 kg) each |
| Woofer Cabinet | ported, rear | ported |
| DIY Kit | No | Yes |
| Spinorama Preference Score | - | 5.11 |
| Spinorama Preference Score with Perfect Sub | - | 7.06 |
Where the Ratings Come From
- ELAC Debut 3.0 DB63: reviews by Erin’s Audio Corner.
- GR-Research Klipsch RP-600M Upgrade: Spinorama.org measurements and reviews by Audio Science Review.
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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