Short answer: the ELAC Uni-Fi 2.0 UB52, if you are buying new. The Boston Acoustics A25 ranks higher than it (#59 vs #130 of 160 bookshelf speakers, 3.6/5 vs 2.4/5) but is discontinued, so only consider it used; the ELAC Uni-Fi 2.0 UB52 is still sold new at $599.
The ELAC Uni-Fi 2.0 UB52 is the more accurate, deeper-bass option. Wide, smooth horizontal directivity: beamwidth holds to about ±60 degrees up to 8kHz before narrowing. Its measured preference score, a predictor of how neutral it sounds, is 5.32 against 3.53 for the Boston Acoustics A25. Its bass reaches about 55.7Hz before falling 3dB, against 90Hz for the Boston Acoustics A25. Watch for: Dipped 3db from 1.5-3kHz.
The Boston Acoustics A25 is the better-sounding pick. CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz: directivity is good enough that the response can be EQed and won’t be too room-dependent. The catch: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip.
Buy the ELAC Uni-Fi 2.0 UB52, since the Boston Acoustics A25 is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| ELAC Uni-Fi 2.0 UB52 | Boston Acoustics A25 | |
|---|---|---|
| Price | $599.00 per pair | $299.98 per pair Discontinued |
| Ranked | #130 of 160 in Medium Size Bookshelf Speakers | #59 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) | 10.7H x 7.25W x 8.9D in |
| Impedance | 6 ohms | 8 ohms nominal |
| 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 | 1” Kortec soft dome tweeter, 5.25” ceramic/glass-fiber polymer mid/woofer |
| Power Handling | 140W max | 10-150W recommended |
| Woofer Cabinet | ported | ported, rear |
| Weight | 7.7 lbs (3.5 kg) | 10.1 lbs (4.58 kg) each |
| Bass Extension (-3dB) | 55.7Hz (measured, Audio Science Review) | 90Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 38.6Hz (measured, Audio Science Review) | 55Hz (measured, Audio Science Review) |
| Spinorama Preference Score | 5.32 (spinorama.org) | 3.53 |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) | 6.19 |
| DIY Kit | No | No |
| Frequency Response | - | 55Hz - 25kHz (Manufacturer specified) |
Related Speaker Comparisons
How Boston Acoustics A25 compares with other leading options:
- Ascend Sierra 1 v2 vs Boston Acoustics A25
- KEF LS50 Meta vs Boston Acoustics A25
- Arendal 1961 Monitor vs Boston Acoustics A25
- Revel M105 vs Boston Acoustics A25
- Klipsch RP-500M II vs Boston Acoustics A25
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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Boston Acoustics A25: $299.98 per pair Discontinued eBay
Pros: CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz: directivity is good enough that the response can be EQed and won’t be too room-dependent. Cabinet fit and finish is well above its price class, and dynamics were strong with no distortion audible even at high volume on well-recorded material. Discontinued, but the reviewer suggests hunting for clearance pricing on remaining stock. Measured bass extension of 90Hz (-3dB), with a measured sensitivity of 85dB.
Cons: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip. The rear port itself measured audibly distorted up close, though it wasn’t noticeable from normal listening distance in the reviewer’s room. Discontinued.
Full Boston Acoustics A25 review and specifications →
| Bass Extension (-10dB) | 55Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 90Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 10.7H x 7.25W x 8.9D in |
| Drivers | 1” Kortec soft dome tweeter, 5.25” ceramic/glass-fiber polymer mid/woofer |
| Frequency Response | 55Hz - 25kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Power Handling | 10-150W recommended |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Spinorama Preference Score | 3.53 |
| Spinorama Preference Score with Perfect Sub | 6.19 |
| Weight | 10.1 lbs (4.58 kg) each |
| Woofer Cabinet | ported, rear |
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