Short answer: the Ascend Acoustics CBM-170 SE2. It ranks #113 of 222 bookshelf speakers by sound quality, rated 3.8/5, at $468. The ELAC Debut 2.0 B6.2 ranks #149, rated 3.5/5, at $329, $139 cheaper, which does not close the gap in sound quality.
Why pick the ELAC Debut 2.0 B6.2: Large bookshelf speakers that play very loud with low distortion and decent bass, a solid budget choice. The catch: 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 Ascend Acoustics CBM-170 SE2 is the more accurate choice. Compact two-way bookshelf speakers with a SEAS tweeter, a very flat midrange and smooth sound that suits most rooms. Its measured preference score, a predictor of how neutral it sounds, is 6.30 against 4.75 for the ELAC Debut 2.0 B6.2. Watch for: A narrow dip in the on-axis and listening-window response appears in the 3-5kHz range (down to about -2.7dB), mirrored by a matching dip in the directivity index at the same frequencies: likely a brief widening of dispersion right at the tweeter/woofer crossover.
Buy the Ascend Acoustics CBM-170 SE2. It is rated higher for sound quality, and saving $139 with the ELAC Debut 2.0 B6.2 does not make up for the sound-quality gap.
Want more options? Browse the full Passive Home rankings.
Large bookshelf speakers that play very loud with low distortion and decent bass, a solid budget choice.
Compact two-way bookshelf speakers with a SEAS tweeter, a very flat midrange and smooth sound that suits most rooms.
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Specifications Side By Side
| ELAC Debut 2.0 B6.2 | Ascend Acoustics CBM-170 SE2 | |
|---|---|---|
| Price | $329.00 per pair | $468 per pair |
| Ranked | #149 of 222 in Large Size Bookshelf Speakers | #113 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 50Hz (measured, manufacturer spinorama data) |
| Bass Extension (-3dB) | 64Hz (measured, Erin’s Audio Corner) | 70Hz (measured, manufacturer spinorama data) |
| Impedance | 6 ohms nominal, 5.2 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms |
| Sensitivity | 86.5dB (measured, Audio Science Review) | 86.8dB (2.83V/1m, measured, manufacturer spinorama data; 87dB manufacturer specified) |
| Drivers | 25mm tweeter + 165mm woofer | 27mm custom SEAS soft dome tweeter, 6.5” proprietary composite polygel cone woofer |
| Weight | 29.1 lbs (13.2 kg) | 15 lbs (6.8 kg) each |
| Dimensions | 14.8”H x 7.7”W x 10.6”D (375.0 x 195.0 x 268.0 mm) | 12H x 9W x 9.5D in |
| Woofer Cabinet | ported, front | ported, rear |
| Spinorama Preference Score | 4.75 (spinorama.org) | 6.30 |
| Spinorama Preference Score with Perfect Sub | 7.0 (spinorama.org) | 8.66 |
| DIY Kit | No | No |
| Power Handling | - | 200W continuous, 400W peak |
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