Short answer: the ELAC Debut 2.0 B5.2. It ranks #86 of 160 bookshelf speakers by sound quality, rated 3.2/5, at $269. The Polk T15 ranks #146, rated 1.9/5, at $149, $120 cheaper, a saving that is not big enough to make up the sound-quality gap.
The ELAC Debut 2.0 B5.2 is the more accurate, deeper-bass choice. Good horizontal directivity: the off-axis curves track the on-axis response closely, so the broad tonal error responds predictably to EQ. Its measured preference score, a predictor of how neutral it sounds, is 5.02 against 0.34 for the Polk T15. Its bass reaches about 60Hz before falling 3dB, against 88.6Hz for the Polk T15. The tradeoff: Erin measured a broad +3dB step beginning around 1.5kHz; the resulting elevated upper range sounds tonally uneven even though it is not a narrow, sharp resonance.
Why pick the Polk T15: Extremely affordable 2-way design that actually measured better at +/-20 degrees vertical off-axis than directly on-axis. The catch: Spinorama analysis reveals what Amir called a “horrific drop in upper mids/lower treble region of 3 to 6 kHz,” likely from tweeter-woofer phase cancellation directly on-axis.
Buy the ELAC Debut 2.0 B5.2. It is rated higher for sound quality, and the $120 you would save on the Polk T15 does not close the gap.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| ELAC Debut 2.0 B5.2 | Polk T15 | |
|---|---|---|
| Price | $269.00 per pair | $149.00 per pair |
| Ranked | #86 of 160 in Medium Size Bookshelf Speakers | #146 of 160 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 58.1Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 60Hz (measured, Erin’s Audio Corner) | 88.6Hz (measured, Audio Science Review) |
| Dimensions | 13.4”H x 7.1”W x 9.2”D (341 x 180 x 234 mm) | 10.63H x 6.5W x 7.25D in |
| Impedance | 6 ohms nominal (manufacturer specified) | 8 ohms nominal |
| Sensitivity | About 83dB after recommended EQ (measured, Erin’s Audio Corner; 86dB manufacturer specified) | 89dB (manufacturer specified, 1W/1m); 88.98dB measured, spinorama.org |
| Drivers | 5.25” aramid-fiber woofer, 1” cloth-dome tweeter | 0.75” tweeter, 5.25” woofer |
| Weight | 13 lbs (5.9 kg) each | 8.2 lbs (3.74 kg) each |
| Woofer Cabinet | ported, front | - |
| Spinorama Preference Score | 5.02 | 0.34 |
| Spinorama Preference Score with Perfect Sub | 7.27 | 3.39 |
| DIY Kit | No | No |
| Frequency Response | - | 60Hz - 24kHz (Manufacturer specified) |
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The Two Speakers In Full
ELAC Debut 2.0 B5.2: $269.00 per pair Amazon eBay
Newer model: the ELAC Debut 3.0 DB53, ranked higher, estimated 3.9/5.
Same family: the ELAC Debut 2.0 B6.2 (larger bookshelf, rated 3.5/5).
Pros: Good horizontal directivity: the off-axis curves track the on-axis response closely, so the broad tonal error responds predictably to EQ. Erin demonstrated that a single high-shelf filter centered near 1.6kHz, about -2dB with Q near 2, substantially improves linearity. Moderate roughly +/-50-60 degree horizontal coverage balances room interaction and image focus. The front port makes close-to-wall placement practical. Erin measured F3 near 60Hz and F10 near 40Hz, useful extension for a compact 5.25-inch two-way. Harmonic distortion is mostly below 1% at 86dB/1m, and low-frequency distortion is better than its size might suggest. Compact cabinet and inexpensive pair pricing make it a workable EQ-assisted desktop or small-room system. Measured bass extension of 60Hz (-3dB), with a measured sensitivity of 83dB.
Cons: Erin measured a broad +3dB step beginning around 1.5kHz; the resulting elevated upper range sounds tonally uneven even though it is not a narrow, sharp resonance. Native response spans roughly -2.6 to +4dB around the mean, so this is not a neutral speaker without correction. Sensitivity is only about 83dB after correcting the shelf, demanding materially more amplifier voltage than ELAC’s 86dB specification implies. Vertical response changes substantially outside roughly +/-10 degrees of tweeter height. Dynamic compression is the larger limitation: at the highest sweep level it loses roughly 1-1.5dB through the midrange, and even the 86dB trace shows unusual nonlinearity that may involve crossover heating. At about 96dB, multitone distortion rises audibly around 600Hz; an 80-120Hz subwoofer crossover helps but does not turn it into a high-output design. Erin recommends the larger ELAC Debut 2.0 B6.2 instead when EQ is unavailable.
Full ELAC Debut 2.0 B5.2 review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 60Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 13.4”H x 7.1”W x 9.2”D (341 x 180 x 234 mm) |
| Drivers | 5.25” aramid-fiber woofer, 1” cloth-dome tweeter |
| Impedance | 6 ohms nominal (manufacturer specified) |
| Sensitivity | About 83dB after recommended EQ (measured, Erin’s Audio Corner; 86dB manufacturer specified) |
| Spinorama Preference Score | 5.02 |
| Spinorama Preference Score with Perfect Sub | 7.27 |
| Weight | 13 lbs (5.9 kg) each |
| Woofer Cabinet | ported, front |
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Polk T15: $149.00 per pair Amazon eBay
Same family: the Polk T50 (floorstanding, rated 3.8/5).
Pros: Extremely affordable 2-way design that actually measured better at +/-20 degrees vertical off-axis than directly on-axis. In near-field desktop use, the reviewer found the T15 “didn’t sound that horrible,” partly because nearby desk reflections mask the frequency response dip. Measured bass extension of 88.6Hz (-3dB), with a measured sensitivity of 89dB.
Cons: Spinorama analysis reveals what Amir called a “horrific drop in upper mids/lower treble region of 3 to 6 kHz,” likely from tweeter-woofer phase cancellation directly on-axis. Measured impedance ranges from 4-8 ohms, contradicting the specified 6-8 ohm range, and there’s a distortion peak around 400Hz. On- and off-axis response “vary a ton,” making listening position unusually important. The reviewer recommends saving up for the Pioneer SP-BS22-LR instead: “I can’t justify recommending the Polk T15 even though subjective performance was not horrible.”
Full Polk T15 review and specifications →
| Bass Extension (-10dB) | 58.1Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 88.6Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 10.63H x 6.5W x 7.25D in |
| Drivers | 0.75” tweeter, 5.25” woofer |
| Frequency Response | 60Hz - 24kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Sensitivity | 89dB (manufacturer specified, 1W/1m); 88.98dB measured, spinorama.org |
| Spinorama Preference Score | 0.34 |
| Spinorama Preference Score with Perfect Sub | 3.39 |
| Weight | 8.2 lbs (3.74 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons