Short answer: the ELAC Uni-Fi 2.0 UB52 on measurements, though neither ranks well in its class. Its horizontal directivity stays wide and smooth, holding beamwidth to about ±60 degrees up to 8kHz, though it dips 3db from 1.5-3kHz. The Definitive Technology ProMonitor 1000’s slow bass rolloff lets it be pushed fairly hard for its size, but its spinorama shows severely reduced bass energy between 40-120Hz, a tweeter/woofer directivity mismatch, and a severe resonance around 14kHz. Both are rated below 3.0/5 among the 90 bookshelf speakers; for better sound, the Philharmonic Ceramic Mini ranks #2 at $900.
Buy the ELAC Uni-Fi 2.0 UB52. It is rated higher for sound quality, and the $301 you would save on the Definitive Technology ProMonitor 1000 does not close the gap.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| ELAC Uni-Fi 2.0 UB52 | Definitive Technology ProMonitor 1000 | |
|---|---|---|
| Price | $799.00 per pair | $498 per pair |
| Ranked | #70 of 90 in Medium Size Bookshelf Speakers | #82 of 90 in Medium Size Bookshelf Speakers |
| Crossover Frequency | 200Hz / 2000Hz | - |
| Dimensions | 13.6”H x 7.3”W x 10.8”D (346 x 185 x 275 mm) | 10.88H x 6.25W x 6.5D in |
| Impedance | 6 ohms | 8 ohms nominal |
| Sensitivity | 83.3dB (measured by Audio Science Review; 85dB manufacturer specified) | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) |
| Drivers | 5.25” aluminum woofer, 4” aluminum midrange, 1” soft dome tweeter | 1” aluminum dome tweeter, 5.25” BDSS mid/woofer, 5.25” planar bass radiator |
| Power Handling | 140W max | - |
| Woofer Cabinet | ported | passive radiator |
| Weight | 7.7 lbs (3.5 kg) | 7.3 lbs (3.29 kg) each |
| Bass Extension (-3dB) | 55.7Hz (measured, Audio Science Review) | 95Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 38.6Hz (measured, Audio Science Review) | 80Hz (measured, Audio Science Review) |
| Spinorama Preference Score | 5.32 (spinorama.org) | 3.2 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) | 6.58 (spinorama.org) |
| DIY Kit | No | No |
| Frequency Response | - | 47Hz - 30kHz (Manufacturer specified) |
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Prices on this page were last checked October 2, 2026 at 10:18 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
ELAC Uni-Fi 2.0 UB52: $799.00 per pair Amazon eBay
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. Measured bass extension of 55.7Hz (-3dB), with a measured sensitivity of 83.3dB.
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 |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 5.32 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) |
| Weight | 7.7 lbs (3.5 kg) |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Definitive Technology ProMonitor 1000: $498 per pair Amazon eBay
Pros: Bass distortion is well controlled per the measurements, and the slow bass rolloff means it can be pushed fairly hard for its size. Ships with a footer that keeps the small cabinet planted despite its light weight. Measured bass extension of 95Hz (-3dB), with a measured sensitivity of 86dB.
Cons: CEA2034 spinorama shows severely reduced bass energy between 40-120Hz, a directivity mismatch between the tweeter and woofer, and a severe resonance/interference issue around 14kHz. Distortion at 96dB SPL was so bad the reviewer limited testing to 86dB. Direct comparison to a $118/pair Pioneer SP-BS22-LR left the reviewer calling the $249/pair ProMonitor 1000 “a bad experiment that should be forgotten” and concluding “there is nothing Pro about it.”
Full Definitive Technology ProMonitor 1000 review and specifications →
| Bass Extension (-10dB) | 80Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 95Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 10.88H x 6.25W x 6.5D in |
| Drivers | 1” aluminum dome tweeter, 5.25” BDSS mid/woofer, 5.25” planar bass radiator |
| Frequency Response | 47Hz - 30kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Sensitivity | 86dB (2.83V/1m, measured, Audio Science Review - reviewer noted this vs. a manufacturer spec of 91dB) |
| Spinorama Preference Score | 3.2 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.58 (spinorama.org) |
| Weight | 7.3 lbs (3.29 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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