Short answer: the ELAC Debut 2.0 B5.2. It ranks #31 of 63 bookshelf speakers by sound quality at $329; the ELAC Uni-Fi 2.0 UB52 ranks #44 and costs $599, so there is not much of a tradeoff to weigh.
On the ELAC Debut 2.0 B5.2 side: Good horizontal directivity: the off-axis curves track the on-axis response closely, so the broad tonal error responds predictably to EQ. Set against that: 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.
The case for the ELAC Uni-Fi 2.0 UB52: Wide, smooth horizontal directivity - beamwidth holds to about ±60 degrees up to 8kHz before narrowing. The catch: Dipped 3db from 1.5-3khz.
Buy the ELAC Debut 2.0 B5.2. It ranks higher for sound quality than the ELAC Uni-Fi 2.0 UB52 and costs less, so there is no real case for the other one.
Specifications Side By Side
| ELAC Debut 2.0 B5.2 | ELAC Uni-Fi 2.0 UB52 | |
|---|---|---|
| Price | $329.00 | $599.00 |
| Ranked | #31 of 63 in Medium Size Bookshelf Speakers | #44 of 63 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 38.6Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 60Hz (measured, Erin’s Audio Corner) | 55.7Hz (measured, Audio Science Review) |
| Dimensions | 13.4"H x 7.1"W x 9.2"D (341 x 180 x 234 mm) | 13.6"H x 7.3"W x 10.8"D (346 x 185 x 275 mm) |
| Impedance | 6 ohms nominal (manufacturer specified) | 6 ohms |
| Sensitivity | About 83dB after recommended EQ (measured, Erin’s Audio Corner; 86dB manufacturer specified) | 83.3dB (measured by Audio Science Review; 85dB manufacturer specified) |
| Drivers | 5.25" aramid-fiber woofer, 1" cloth-dome tweeter | 5.25" aluminum woofer, 4" aluminum midrange, 1" soft dome tweeter |
| Weight | 13 lbs / 5.9 kg each | 7.7 lbs / 3.5 kg |
| Woofer Cabinet | ported, front | ported |
| Crossover Frequency | - | 200Hz / 2000Hz |
| Power Handling | - | 140W max |
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The Two Speakers In Full
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 |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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ELAC Uni-Fi 2.0 UB52: $599.00 Amazon
Pros: Wide, smooth horizontal directivity - beamwidth holds to about ±60 degrees up to 8kHz before narrowing. Vertical directivity is substantially better than average, giving more listening-height leeway than most two-way bookshelf speakers.
Cons: Dipped 3db from 1.5-3khz. On-axis response shelves down above 1.5kHz along with multiple resonances, leading the reviewer to predict it will “likely sound dull.” Nasty resonance at 600hz - audible as an actual buzzing artifact on some recordings (the reviewer demonstrated it with an Eva Cassidy track), and it shows up as a sharp distortion spike exceeding 4% at 585Hz when driven to 96dB SPL/1m. Not recommended.
Full ELAC Uni-Fi 2.0 UB52 review and specifications →
| Bass Extension (-10dB) | 38.6Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 55.7Hz (measured, Audio Science Review) |
| Crossover Frequency | 200Hz / 2000Hz |
| Dimensions | 13.6"H x 7.3"W x 10.8"D (346 x 185 x 275 mm) |
| Drivers | 5.25" aluminum woofer, 4" aluminum midrange, 1" soft dome tweeter |
| Impedance | 6 ohms |
| Power Handling | 140W max |
| Sensitivity | 83.3dB (measured by Audio Science Review; 85dB manufacturer specified) |
| Weight | 7.7 lbs / 3.5 kg |
| Woofer Cabinet | ported |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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