Short answer: the ELAC Debut 3.0 DB63. It ranks #41 of 131 bookshelf speakers by sound quality at $499; the JBL 708i ranks #73 and costs $1599, so there is not much of a tradeoff to weigh.
What the ELAC Debut 3.0 DB63 offers: 1” aluminum dome tweeter with a distinctive partial-lens waveguide design paired with a 6.5” third-generation aramid fiber cone woofer, in a robustly built cabinet for the price. Shallow bass rolloff (F3 76Hz, F10 40Hz) allows placement close to a wall without excessive boominess, useful for smaller living rooms. Solid measured performance for the price: on-axis linearity within about 2.5dB, impedance dipping only to about 4.4 ohms (easily AVR-driven), and roughly 20-26dB of usable dynamic range. A clear improvement over its sibling ELAC DB62, which has a sibilance issue tied to the crossover that can’t be fixed with EQ. Wide horizontal radiation of about ±60°, giving a spacious soundstage. Distortion looks good at a moderate 86dB and still reasonable at 96dB. Takes well to EQ correction - the reviewer provides a specific filter set (a low-shelf boost at 650Hz plus peaking cuts/boosts at 550Hz, 660Hz, and 3kHz) that meaningfully smooths out its known deviations. Watch for: A dip in the lower midrange (300-600Hz, about 1.5dB) reduces vocal warmth and can make voices sound slightly hollow. A high-Q resonance around 650-750Hz shows up clearly in measurements, though the reviewer couldn’t reliably hear it in his own A/B testing. A dip around 2-3kHz (roughly 1-2dB) slightly reduces speech intelligibility and attack in the upper midrange. Directivity droops above about 2kHz as the midwoofer narrows toward its beaming frequency while the tweeter’s pattern behaves differently - an inherent trade-off of physically separated drivers that can’t be fully corrected without introducing other issues. Multitone distortion crosses the reviewer’s 3% threshold in the 200Hz-1kHz range, and adding a subwoofer at an 80Hz crossover only modestly reduces it. Toeing the speaker away from the listener loses noticeable top-end air and cymbal energy, giving a softer upper register. Practical loudness ceiling is around 90dB at typical listening distance before midrange distortion and bass attack begin to degrade. Still needs a subwoofer for extension below about 40Hz.
What the JBL 708i offers: High-output 8-inch professional monitor with JBL’s compression driver and Image Control Waveguide. In JBL’s intended bi-amplified Crown DCI/DSP configuration, ASR data shows 39Hz extension, controlled roughly +/-50-degree horizontal coverage and a 5.35 preference score with a subwoofer. Watch for: This is not self-powered: achieving the measured active-mode response requires compatible external amplification and JBL processing, adding substantial cost and complexity. On-axis smoothness (0.241), predicted in-room smoothness (0.198) and a 3.47 raw preference score are modest for the system price.
Buy the ELAC Debut 3.0 DB63. It ranks higher for sound quality than the JBL 708i and costs less, so there is no real case for the other one.
Specifications Side By Side
| ELAC Debut 3.0 DB63 | JBL 708i | |
|---|---|---|
| Price | $499.00 | $1,599 each |
| Ranked | #41 of 131 in Large Size Bookshelf Speakers | #73 of 131 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-3dB) | 76Hz (measured, Erin’s Audio Corner) | - |
| Dimensions | 13.3"H x 7.7"W x 11.7"D (337.8 x 195.6 x 297.2 mm) | 17.2H x 9.8W x 11.5D in |
| Impedance | 6 ohms nominal (4.4 ohms minimum, measured, Erin’s Audio Corner) | - |
| Sensitivity | 86.2dB (measured, Erin’s Audio Corner) | - |
| Drivers | 6.5" Aramid Fiber woofer, 1" soft dome tweeter | 1" compression driver, 8" woofer |
| Weight | 17.2 lbs / 7.8 kg each | 25.4 lbs each |
| Woofer Cabinet | ported, rear | - |
| Enclosure | - | 2-way passive/bi-amplified, dual front ports |
| Maximum SPL | - | 108dB continuous, 114dB peak |
| Amplification | - | External Crown DCI amplifier and JBL DSP required for measured active configuration |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Wharfedale Linton 85 vs Emotiva Airmotiv XB2
- Emotiva Airmotiv XB2 vs ELAC Uni-Fi Reference UBR62
- Emotiva Airmotiv XB2 vs JBL HDI-1600
- ELAC Debut 3.0 DB63 vs Sonus Faber Lumina II
- ELAC Debut 3.0 DB63 vs Ascend Acoustics Sierra-LX
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The Two Speakers In Full
ELAC Debut 3.0 DB63: $499.00 Amazon Crutchfield eBay
Pros: 1” aluminum dome tweeter with a distinctive partial-lens waveguide design paired with a 6.5” third-generation aramid fiber cone woofer, in a robustly built cabinet for the price. Shallow bass rolloff (F3 76Hz, F10 40Hz) allows placement close to a wall without excessive boominess, useful for smaller living rooms. Solid measured performance for the price: on-axis linearity within about 2.5dB, impedance dipping only to about 4.4 ohms (easily AVR-driven), and roughly 20-26dB of usable dynamic range. A clear improvement over its sibling ELAC DB62, which has a sibilance issue tied to the crossover that can’t be fixed with EQ. Wide horizontal radiation of about ±60°, giving a spacious soundstage. Distortion looks good at a moderate 86dB and still reasonable at 96dB. Takes well to EQ correction - the reviewer provides a specific filter set (a low-shelf boost at 650Hz plus peaking cuts/boosts at 550Hz, 660Hz, and 3kHz) that meaningfully smooths out its known deviations.
Cons: A dip in the lower midrange (300-600Hz, about 1.5dB) reduces vocal warmth and can make voices sound slightly hollow. A high-Q resonance around 650-750Hz shows up clearly in measurements, though the reviewer couldn’t reliably hear it in his own A/B testing. A dip around 2-3kHz (roughly 1-2dB) slightly reduces speech intelligibility and attack in the upper midrange. Directivity droops above about 2kHz as the midwoofer narrows toward its beaming frequency while the tweeter’s pattern behaves differently - an inherent trade-off of physically separated drivers that can’t be fully corrected without introducing other issues. Multitone distortion crosses the reviewer’s 3% threshold in the 200Hz-1kHz range, and adding a subwoofer at an 80Hz crossover only modestly reduces it. Toeing the speaker away from the listener loses noticeable top-end air and cymbal energy, giving a softer upper register. Practical loudness ceiling is around 90dB at typical listening distance before midrange distortion and bass attack begin to degrade. Still needs a subwoofer for extension below about 40Hz.
Full ELAC Debut 3.0 DB63 review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 76Hz (measured, Erin's Audio Corner) |
| Dimensions | 13.3"H x 7.7"W x 11.7"D (337.8 x 195.6 x 297.2 mm) |
| Drivers | 6.5" Aramid Fiber woofer, 1" soft dome tweeter |
| Impedance | 6 ohms nominal (4.4 ohms minimum, measured, Erin's Audio Corner) |
| Sensitivity | 86.2dB (measured, Erin's Audio Corner) |
| Weight | 17.2 lbs / 7.8 kg each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- ELAC Debut 3.0 DB63 vs Emotiva Airmotiv XB2
- ELAC Debut 3.0 DB63 vs Arendal 1723 Bookshelf S THX
- ELAC Debut 3.0 DB63 vs Perlisten R5m
- ELAC Debut 3.0 DB63 vs Perlisten A3m
- ELAC Debut 3.0 DB63 vs JBL HDI-1600
- ELAC Debut 3.0 DB63 vs Ascend Acoustics Sierra-2EX V2
- ELAC Debut 3.0 DB63 vs Selah Audio Integrity
- ELAC Debut 3.0 DB63 vs Aalto Speakers Aalto 3 Passive
- See all 129 comparisons
JBL 708i: $1,599 each B&H Photo Video eBay
Pros: High-output 8-inch professional monitor with JBL’s compression driver and Image Control Waveguide. In JBL’s intended bi-amplified Crown DCI/DSP configuration, ASR data shows 39Hz extension, controlled roughly +/-50-degree horizontal coverage and a 5.35 preference score with a subwoofer.
Cons: This is not self-powered: achieving the measured active-mode response requires compatible external amplification and JBL processing, adding substantial cost and complexity. On-axis smoothness (0.241), predicted in-room smoothness (0.198) and a 3.47 raw preference score are modest for the system price.
Full JBL 708i review and specifications →
| Amplification | External Crown DCI amplifier and JBL DSP required for measured active configuration |
|---|---|
| Dimensions | 17.2H x 9.8W x 11.5D in |
| Drivers | 1" compression driver, 8" woofer |
| Enclosure | 2-way passive/bi-amplified, dual front ports |
| Maximum SPL | 108dB continuous, 114dB peak |
| Weight | 25.4 lbs each |
- Links
- Reviews, Comparisons and Sound Samples