Short answer: the ELAC DB63 for a cleaner overall measured performance, the Polk Signature Elite ES20 if deep bass without a subwoofer matters most. The DB63 ranks #50 of 203 large bookshelf speakers at $499, the ES20 ranks #110 at $259, a $240 difference.
Bass extension actually favors the cheaper Polk. ASR’s measurements put the ES20’s estimated in-room extension at 41Hz with a well-damped Q of 0.66, deep for the price without a subwoofer. Erin’s Audio Corner measured the DB63’s rolloff at F3 76Hz and F10 40Hz, shallower by design so it can sit close to a wall without excess boominess, useful in smaller rooms, but that means it leans on a subwoofer sooner for genuine low-end extension.
Everywhere else, the DB63’s measurements are the more thoroughly documented and generally cleaner set. Erin’s Audio Corner found on-axis linearity within about 2.5dB, horizontal radiation of roughly plus or minus 60 degrees for a spacious soundstage, and 20 to 26dB of usable dynamic range, plus distortion that stays well controlled at 86dB and still reasonable at 96dB. It also represents a real fix over its sibling, the DB62, whose crossover-related sibilance issue Erin’s Audio Corner noted couldn’t be corrected with EQ. The ES20’s own ASR-derived numbers, a predicted in-room smoothness of 0.238 and directivity-index consistency of 3.81, are described as average rather than class-leading, and its 6.44 preference score requires adding a subwoofer to reach.
The DB63 does have real measured flaws of its own: a 1.5dB dip in the 300 to 600Hz lower midrange that can make voices sound slightly hollow, a high-Q resonance around 650 to 750Hz, and directivity that droops above roughly 2kHz as the woofer narrows toward its beaming frequency. Erin’s Audio Corner publishes a specific EQ filter set that smooths out most of these deviations for anyone willing to apply it.
Buy the ELAC Debut 3.0 DB63 if you want the more extensively measured, more correctable speaker and are willing to pair it with a subwoofer for real bass extension.
Buy the Polk Signature Elite ES20 if you want usable bass straight out of the box at a lower price and can live with midrange and directivity performance that measures as merely average.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| ELAC Debut 3.0 DB63 | Polk Signature Elite ES20 | |
|---|---|---|
| Price | $499.00 per pair | $259.00 per pair |
| Ranked | #50 of 203 in Large Size Bookshelf Speakers | #110 of 203 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 76Hz (measured, Erin’s Audio Corner) | 55.7Hz (measured, ASR via spinorama.org) |
| Dimensions | 13.3”H x 7.7”W x 11.7”D (337.8 x 195.6 x 297.2 mm) | 14.8H x 8.5W x 13.8D in |
| Impedance | 6 ohms nominal (4.4 ohms minimum, measured, Erin’s Audio Corner) | 4/8-ohm compatible |
| Sensitivity | 86.2dB (measured, Erin’s Audio Corner) | 86dB |
| Drivers | 6.5” Aramid Fiber woofer, 1” soft dome tweeter | 1” Terylene dome tweeter, 6.5” polypropylene woofer |
| Weight | 17.2 lbs (7.8 kg) each | 17 lbs (7.7 kg) each |
| Woofer Cabinet | ported, rear | - |
| DIY Kit | No | No |
| Enclosure | - | 2-way, Power Port bass-reflex |
| Country | - | United States (design) |
| Spinorama Preference Score | - | 4.49 |
| Spinorama Preference Score with Perfect Sub | - | 6.44 |
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The Two Speakers In Full
ELAC Debut 3.0 DB63: $499.00 per pair Amazon Crutchfield eBay
Older model: the ELAC Debut 2.0 B6.2 (ranked lower, rated 3.5/5).
Same family: the ELAC Debut 3.0 DB53 (smaller bookshelf, estimated 3.9/5), the ELAC Debut 3.0 DF53 (smaller floorstanding, estimated 4.2/5), the ELAC Debut 3.0 DF63 (larger floorstanding, rated 4.2/5), the ELAC Debut 3.0 DC53 (smaller center, estimated 3.4/5) and the ELAC Debut 3.0 DC63 (larger center, estimated 3.5/5).
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. Measured bass extension of 76Hz (-3dB), with a measured sensitivity of 86.2dB.
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) |
| DIY Kit | No |
| 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
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Polk Signature Elite ES20: $259.00 per pair B&H Photo Video eBay
Same family: the Polk Signature Elite ES10 (smaller bookshelf, estimated 3.1/5), the Polk Signature Elite ES15 (smaller bookshelf, rated 3.5/5), the Polk Signature Elite ES50 (smallest floorstanding, estimated 3.8/5), the Polk Signature Elite ES55 (floorstanding, estimated 4/5), the Polk Signature Elite ES60 (largest floorstanding, rated 3.4/5), the Polk Audio Signature Elite ES30 (smaller center, estimated 3.5/5), the Polk Audio Signature Elite ES35 (larger center, estimated 3.4/5), the Polk Audio Signature Elite ES8 Subwoofer (smallest subwoofer, estimated 3.2/5), the Polk Audio Signature Elite ES10 Subwoofer (subwoofer, estimated 3.7/5) and the Polk Audio Signature Elite ES12 Subwoofer (largest subwoofer, estimated 3.8/5).
Pros: A full-size, efficient 6.5-inch bookshelf pair with unusually deep bass for the price. ASR measured 41Hz estimated in-room extension, a well-damped Q of 0.66, broad horizontal coverage to roughly +/-60 degrees and a 6.44 preference score with a subwoofer. Measured bass extension of 55.7Hz (-3dB).
Cons: Predicted in-room smoothness of 0.238 and directivity-index consistency of 3.81 are average rather than class-leading. The deep cabinet needs substantial shelf or stand space, and its Power Port still requires rear clearance.
Full Polk Signature Elite ES20 review and specifications →
| Bass Extension (-10dB) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 55.7Hz (measured, ASR via spinorama.org) |
| Country | United States (design) |
| DIY Kit | No |
| Dimensions | 14.8H x 8.5W x 13.8D in |
| Drivers | 1” Terylene dome tweeter, 6.5” polypropylene woofer |
| Enclosure | 2-way, Power Port bass-reflex |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB |
| Spinorama Preference Score | 4.49 |
| Spinorama Preference Score with Perfect Sub | 6.44 |
| Weight | 17 lbs (7.7 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
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