Short answer: the Polk Audio XT15. It ranks #26 of 63 bookshelf speakers by sound quality at $179; the ELAC Debut 2.0 B5.2 ranks #31 and costs $329, so there is not much of a tradeoff to weigh.
What the Polk Audio XT15 offers: Very low $179/pair entry price for a Hi-Res Audio Certified 2-way design that’s Dolby Atmos and DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs so it drops into almost any AVR without matching concerns. The catch: Bass rolls off earlier than most of this batch at 77.6Hz (-3dB) / 54.2Hz (-10dB).
The case for the ELAC Debut 2.0 B5.2: Good horizontal directivity: the off-axis curves track the on-axis response closely, so the broad tonal error responds predictably to EQ. 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.
Buy the Polk Audio XT15. It ranks higher for sound quality than the ELAC Debut 2.0 B5.2 and costs less, so there is no real case for the other one.
Specifications Side By Side
| Polk Audio XT15 | ELAC Debut 2.0 B5.2 | |
|---|---|---|
| Price | $179 | $329.00 |
| Ranked | #26 of 63 in Medium Size Bookshelf Speakers | #31 of 63 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 54.2Hz (measured, spinorama.org) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) | 60Hz (measured, Erin’s Audio Corner) |
| Dimensions | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each | 13.4"H x 7.1"W x 9.2"D (341 x 180 x 234 mm) |
| Impedance | 4/8-ohm compatible | 6 ohms nominal (manufacturer specified) |
| Sensitivity | 86dB (1W/1m) | About 83dB after recommended EQ (measured, Erin’s Audio Corner; 86dB manufacturer specified) |
| Drivers | 1" Terylene dome tweeter, 5.25" bi-laminate paper woofer | 5.25" aramid-fiber woofer, 1" cloth-dome tweeter |
| Weight | 9 lbs / 4.08 kg (9 lb) each | 13 lbs / 5.9 kg each |
| Woofer Cabinet | Ported | ported, front |
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The Two Speakers In Full
Polk Audio XT15: $179 Amazon Bhphotovideo Crutchfield
Pros: Very low $179/pair entry price for a Hi-Res Audio Certified 2-way design that’s Dolby Atmos and DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs so it drops into almost any AVR without matching concerns. Directivity spread is reasonably even for the price (directivity_spdi_stddev 3.60).
Cons: Bass rolls off earlier than most of this batch at 77.6Hz (-3dB) / 54.2Hz (-10dB). On-axis deviation is the roughest measured figure here (aad_on_axis 0.449), and listening-window smoothness (0.303) trails the pricier options in this group. Modest 86dB sensitivity wants a reasonably powered amp channel. The 5.25” bi-laminate paper woofer is Polk’s entry-tier driver, not the polypropylene/Turbine cones used in its pricier Signature Elite/Reserve lines.
Full Polk Audio XT15 review and specifications →
| Bass Extension (-10dB) | 54.2Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) |
| Dimensions | 16.51 x 18.24cm (6.5 x 7.18 in), 4.08kg (9 lb) each |
| Drivers | 1" Terylene dome tweeter, 5.25" bi-laminate paper woofer |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB (1W/1m) |
| Weight | 9 lbs / 4.08 kg (9 lb) each |
| Woofer Cabinet | Ported |
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ELAC Debut 2.0 B5.2: $329.00 Amazon
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.
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 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) |
| 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) |
| Weight | 13 lbs / 5.9 kg each |
| Woofer Cabinet | ported, front |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
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