Short answer: the ELAC Debut 2.0 B6.2. It ranks #83 of 122 bookshelf speakers by sound quality at $329; the KEF Q350 ranks #98 and costs $699, so there is not much of a tradeoff to weigh.
What the ELAC Debut 2.0 B6.2 offers: Reasonably flat on-axis and listening-window response with reasonably even horizontal directivity, holding about ±60° up to roughly 8kHz for consistent stereo width whether aimed directly at the listener or toed out. Its larger-than-typical woofer lets it play very loud with minimal distortion, staying under about 1% THD down to 50Hz at 86dB, and minimum impedance stays a comfortable 5-6 ohms. In-room bass extension reaches about 50Hz without much trouble, enough for a solid kick-drum sound. Takes equalization very well - correcting the on-axis response doesn’t cost sensitivity through the midrange, and the underlying directivity behavior (diffraction, vertical mismatch) is mild enough that EQ alone gets most of the way to a well-balanced sound. Vertical tolerance is asymmetric and fairly forgiving: about 10° above the tweeter axis and 20° below it before tonal balance meaningfully shifts. One reviewer called it “a good speaker” with “a good price” rather than just good-for-the-price, and found it fairly neutral overall in-room. 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. Directivity error shows up around 3.3kHz, and the upper-midrange around 4-6kHz stood out as edgy and sharp, almost sibilant at times, in casual listening - the predicted in-room response shows a lack of energy between 1-2kHz and a bit too much above that, which one reviewer thought would sound bright. Distortion at 96dB SPL/1m shows two harmonic peaks the reviewer says “should not be there,” one from woofer breakup around 400Hz and another around 7-8kHz from the tweeter, and multitone distortion approaches 10% in the 500-800Hz range at that output level. Real compression shows up even at moderate volume and worsens at 96dB and above, with the woofer clearly giving up around 60-70Hz - a subwoofer is recommended for anyone wanting to listen loud, since running it full-range at high output costs real dynamic range in the midbass and bass. Don’t place it close to a wall - boundary reinforcement adds a midbass bump that undoes the otherwise smooth, linear response. Getting the best out of it takes EQ (taming the 700Hz peak, filling in the 1-2kHz dip, and trimming the highs).
What the KEF Q350 offers: CEA2034 spinorama shows a reasonably flat on-axis response with excellent directivity, aided by the coaxial Uni-Q driver. Vertical directivity is better than most non-coaxial two-way speakers, another benefit of the concentric design. Watch for: Two resonances at 700Hz and 1.2kHz show up on-axis, alongside an upper-bass boost. Predicted in-room response looks a bit boomy as a result. Distortion climbs substantially in the 100Hz-1kHz range at 96dB SPL/1m, with a distinct resonance-driven peak around 900Hz-1kHz at both test levels.
Buy the ELAC Debut 2.0 B6.2. It ranks higher for sound quality than the KEF Q350 and costs less, so there is no real case for the other one.
If sound quality matters at all to you, skip the KEF Q350. It ranks near the bottom of the 122 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| ELAC Debut 2.0 B6.2 | KEF Q350 | |
|---|---|---|
| Price | $329.00 | $699.00 Discontinued |
| Ranked | #83 of 122 in Large Size Bookshelf Speakers | #98 of 122 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 64Hz (measured, Erin’s Audio Corner) | 70Hz (measured, Audio Science Review) |
| Impedance | 6 ohms nominal, 5.2 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 86.5dB (measured, Audio Science Review) | 86dB (measured, Audio Science Review) |
| Drivers | 25mm tweeter + 165mm woofer | 25mm tweeter + 165mm woofer |
| Weight | 29.1 lbs / 13.2 kg | 29.5 lbs / 13.4 kg |
| Dimensions | 14.8"H x 7.7"W x 10.6"D (375.0 x 195.0 x 268.0 mm) | 14.1"H x 8.3"W x 12"D (358.0 x 210.0 x 306.0 mm) |
| Woofer Cabinet | ported, front | ported, rear |
| Discontinued | - | Yes |
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- JBL Studio 630 vs ELAC Debut 2.0 B6.2
- ELAC Debut 2.0 B6.2 vs SVS Prime Bookshelf
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The Two Speakers In Full
ELAC Debut 2.0 B6.2: $329.00 Amazon Crutchfield eBay
Pros: Reasonably flat on-axis and listening-window response with reasonably even horizontal directivity, holding about ±60° up to roughly 8kHz for consistent stereo width whether aimed directly at the listener or toed out. Its larger-than-typical woofer lets it play very loud with minimal distortion, staying under about 1% THD down to 50Hz at 86dB, and minimum impedance stays a comfortable 5-6 ohms. In-room bass extension reaches about 50Hz without much trouble, enough for a solid kick-drum sound. Takes equalization very well - correcting the on-axis response doesn’t cost sensitivity through the midrange, and the underlying directivity behavior (diffraction, vertical mismatch) is mild enough that EQ alone gets most of the way to a well-balanced sound. Vertical tolerance is asymmetric and fairly forgiving: about 10° above the tweeter axis and 20° below it before tonal balance meaningfully shifts. One reviewer called it “a good speaker” with “a good price” rather than just good-for-the-price, and found it fairly neutral overall in-room.
Cons: 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. Directivity error shows up around 3.3kHz, and the upper-midrange around 4-6kHz stood out as edgy and sharp, almost sibilant at times, in casual listening - the predicted in-room response shows a lack of energy between 1-2kHz and a bit too much above that, which one reviewer thought would sound bright. Distortion at 96dB SPL/1m shows two harmonic peaks the reviewer says “should not be there,” one from woofer breakup around 400Hz and another around 7-8kHz from the tweeter, and multitone distortion approaches 10% in the 500-800Hz range at that output level. Real compression shows up even at moderate volume and worsens at 96dB and above, with the woofer clearly giving up around 60-70Hz - a subwoofer is recommended for anyone wanting to listen loud, since running it full-range at high output costs real dynamic range in the midbass and bass. Don’t place it close to a wall - boundary reinforcement adds a midbass bump that undoes the otherwise smooth, linear response. Getting the best out of it takes EQ (taming the 700Hz peak, filling in the 1-2kHz dip, and trimming the highs).
Full ELAC Debut 2.0 B6.2 review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 64Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.8"H x 7.7"W x 10.6"D (375.0 x 195.0 x 268.0 mm) |
| Drivers | 25mm tweeter + 165mm woofer |
| Impedance | 6 ohms nominal, 5.2 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 86.5dB (measured, Audio Science Review) |
| Weight | 29.1 lbs / 13.2 kg |
| Woofer Cabinet | ported, front |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: ELAC Debut 2.0 Review: A Good Budget Speaker More from Erin’s Audio Corner →
- Audio Science Review ELAC Debut 2.0 B6.2 More from Audio Science Review →
- Erin’s Audio Corner Website: ELAC Debut 2.0 B6.2
- Audio Science Review Measurements (spinorama.org)
- Reddit Search for ELAC Debut 2.0 B6.2 Review
- Head-to-Head Comparisons
- ELAC Debut 2.0 B6.2 vs SVS Prime Bookshelf
- ELAC Debut 2.0 B6.2 vs Dynaudio Special Forty
- ELAC Debut 2.0 B6.2 vs KEF Q3 Meta
- ELAC Debut 2.0 B6.2 vs Polk Monitor XT20
- ELAC Debut 2.0 B6.2 vs Infinity IL10
- ELAC Debut 2.0 B6.2 vs GR-Research X-LS Encore
- ELAC Debut 2.0 B6.2 vs Sonus Faber Lumina II
- ELAC Debut 2.0 B6.2 vs Focal Aria 906
- See all 26 comparisons
KEF Q350: $699.00 Discontinued Amazon eBay
Pros: CEA2034 spinorama shows a reasonably flat on-axis response with excellent directivity, aided by the coaxial Uni-Q driver. Vertical directivity is better than most non-coaxial two-way speakers, another benefit of the concentric design.
Cons: Two resonances at 700Hz and 1.2kHz show up on-axis, alongside an upper-bass boost. Predicted in-room response looks a bit boomy as a result. Distortion climbs substantially in the 100Hz-1kHz range at 96dB SPL/1m, with a distinct resonance-driven peak around 900Hz-1kHz at both test levels. Discontinued.
Full KEF Q350 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 70Hz (measured, Audio Science Review) |
| Dimensions | 14.1"H x 8.3"W x 12"D (358.0 x 210.0 x 306.0 mm) |
| Discontinued | Yes |
| Drivers | 25mm tweeter + 165mm woofer |
| Impedance | 4 ohms |
| Sensitivity | 86dB (measured, Audio Science Review) |
| Weight | 29.5 lbs / 13.4 kg |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons