Short answer: the Revel Performa4 M145, if you are buying new. The Revel M105 ranks higher than the ELAC Uni-Fi 2.0 UB52 (#15 vs #130 of 160 bookshelf speakers) but is discontinued; its replacement, the Revel Performa4 M145, is rated 4.3/5 at $1,999.95 and is still sold new.
The ELAC Uni-Fi 2.0 UB52 is the deeper-bass option. Wide, smooth horizontal directivity: beamwidth holds to about ±60 degrees up to 8kHz before narrowing. Its bass reaches about 55.7Hz before falling 3dB, against 63Hz for the Revel M105. Watch for: Dipped 3db from 1.5-3kHz.
The Revel M105 is the better-sounding option. CEA2034 spinorama shows an essentially flat on-axis response with only a small 5kHz peak, a smooth listening window, and clean waterfall decay. Watch for: Low nominal impedance demands a capable amplifier that can handle low-impedance loads.
Buy the Revel Performa4 M145, the replacement for the discontinued Revel M105; it is rated higher for sound quality than the ELAC Uni-Fi 2.0 UB52.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| ELAC Uni-Fi 2.0 UB52 | Revel M105 | |
|---|---|---|
| Price | $599.00 per pair | $1,500 per pair Discontinued |
| Ranked | #130 of 160 in Medium Size Bookshelf Speakers | #15 of 160 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) | 14”H x 7.9”W x 9.8”D (355.6 x 200.7 x 248.9 mm) |
| Impedance | 6 ohms | 8 ohms nominal, low minimum |
| Sensitivity | 83.3dB (measured by Audio Science Review; 85dB manufacturer specified) | 85dB (2.83V/1m, measured, Audio Science Review) |
| Drivers | 5.25” aluminum woofer, 4” aluminum midrange, 1” soft dome tweeter | 5.25” aluminum cone woofer, 1” aluminum tweeter with acoustic lens waveguide |
| Power Handling | 140W max | - |
| Woofer Cabinet | ported | ported, rear |
| Weight | 7.7 lbs (3.5 kg) | 15.4 lbs (7 kg) each |
| Bass Extension (-3dB) | 55.7Hz (measured, Audio Science Review) | 63Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 38.6Hz (measured, Audio Science Review) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Spinorama Preference Score | 5.32 (spinorama.org) | 5.76 |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) | 8.18 |
| DIY Kit | No | No |
| Frequency Response | - | 60Hz - 44kHz (+/-3dB) (Manufacturer specified) |
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Prices on this page were last checked October 7, 2026 at 9:25 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: $599.00 per pair Amazon eBay
Same family: the ELAC Uni-Fi 2.0 UF52 (floorstanding, estimated 4.2/5) and the ELAC Uni-Fi 2.0 UC52 (center, rated 3.9/5).
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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- ELAC Uni-Fi 2.0 UB52 vs Q Acoustics 5020
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- See all 41 comparisons
Revel M105: $1,500 per pair Discontinued eBay
Newer model: the Revel Performa4 M145, ranked higher, estimated 4.3/5.
Same family: the Revel M106 (larger bookshelf, rated 4.6/5), the Revel F206 (smaller floorstanding, rated 4.5/5), the Revel F208 (larger floorstanding, rated 4.5/5), the Revel Performa3 C205 (smaller center, rated 4.1/5) and the Revel Performa3 C208 (larger center, rated 4/5).
Pros: CEA2034 spinorama shows an essentially flat on-axis response with only a small 5kHz peak, a smooth listening window, and clean waterfall decay. Wide horizontal dispersion gives flexibility with toe-in. The reviewer called it reference-quality performance with minor EQ correction applied. Measured bass extension of 63Hz (-3dB), with a measured sensitivity of 85dB.
Cons: Low nominal impedance demands a capable amplifier that can handle low-impedance loads. Bass distortion runs high in the 80-250Hz range from woofer displacement, and maximum output is limited compared to larger designs. Discontinued.
Full Revel M105 review and specifications →
| Bass Extension (-10dB) | 49.8Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 14”H x 7.9”W x 9.8”D (355.6 x 200.7 x 248.9 mm) |
| Drivers | 5.25” aluminum cone woofer, 1” aluminum tweeter with acoustic lens waveguide |
| Frequency Response | 60Hz - 44kHz (+/-3dB) (Manufacturer specified) |
| Impedance | 8 ohms nominal, low minimum |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Spinorama Preference Score | 5.76 |
| Spinorama Preference Score with Perfect Sub | 8.18 |
| Weight | 15.4 lbs (7 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons