Short answer: the Dayton Audio OPAL1. It ranks #33 of 88 bookshelf speakers by sound quality, rated 3.6/5, at $1,038.99. The ELAC Uni-Fi 2.0 UB52 ranks #68, rated 2.4/5, at $599, $439.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the Dayton Audio OPAL1 does well: A 2-way bookshelf speaker with a 5.25” mid-woofer (large surround) and a 1” dome tweeter, plus two passive radiators on the rear panel. The catch: Measured average sensitivity is notably low at about 75.7dB (well under the 78dB spec) due to a nearly 3dB dip through the midrange, and the reviewer needed serious amplification (monoblock power amps, not just a compact streaming amp) to drive them to real listening levels for bass testing.
What the ELAC Uni-Fi 2.0 UB52 does well: Wide, smooth horizontal directivity: beamwidth holds to about ±60 degrees up to 8kHz before narrowing. The tradeoff: Dipped 3db from 1.5-3kHz.
Buy the Dayton Audio OPAL1. It is rated higher for sound quality, and the $439.99 you would save on the ELAC Uni-Fi 2.0 UB52 does not close the gap.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Dayton Audio OPAL1 | ELAC Uni-Fi 2.0 UB52 | |
|---|---|---|
| Price | $1,038.99 per pair | $599.00 per pair |
| Ranked | #33 of 88 in Medium Size Bookshelf Speakers | #68 of 88 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 30Hz (measured, Erin’s Audio Corner) | 38.6Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 55.7Hz (measured, Audio Science Review) |
| Drivers | 5.25” mid-woofer, 1” dome tweeter, dual rear passive radiators | 5.25” aluminum woofer, 4” aluminum midrange, 1” soft dome tweeter |
| Sensitivity | 75.7dB (measured by Erin’s Audio Corner; 78dB manufacturer specified) | 83.3dB (measured by Audio Science Review; 85dB manufacturer specified) |
| Woofer Cabinet | passive radiator, rear (dual) | ported |
| Dimensions | 14”H x 7”W x 9.5”D | 13.6”H x 7.3”W x 10.8”D (346 x 185 x 275 mm) |
| Weight | 20.7 lbs (9.4 kg) each | 7.7 lbs (3.5 kg) |
| Frequency Response | 32Hz - 20kHz (-3dB, half-space, manufacturer specified) | - |
| Impedance | 8 ohms nominal (4.3 ohms minimum @ 4.4kHz, measured, Erin’s Audio Corner) | 6 ohms |
| Power Handling | 200W RMS (75-200W recommended amplifier power) | 140W max |
| Crossover Frequency | 2,200Hz | 200Hz / 2000Hz |
| Spinorama Preference Score | 5.08 | 5.32 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.58 | 7.34 (spinorama.org) |
| DIY Kit | No | No |
Related Speaker Comparisons
How Dayton Audio OPAL1 compares with other leading options:
- Ascend Sierra 1 v2 vs Dayton Audio OPAL1
- KEF LS50 Meta vs Dayton Audio OPAL1
- Arendal 1961 Monitor vs Dayton Audio OPAL1
- Wharfedale Super Denton vs Dayton Audio OPAL1
- KEF Q150 vs Dayton Audio OPAL1
Prices on this page were last checked September 29, 2026 at 3:43 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
Dayton Audio OPAL1: $1,038.99 per pair Dayton Audio eBay
Pros: A 2-way bookshelf speaker with a 5.25” mid-woofer (large surround) and a 1” dome tweeter, plus two passive radiators on the rear panel. A bass shelf in its response lets it sit closer to a wall than many speakers without sounding overly boomy, a similar design trait to the KEF R3 Meta. Measured F3 of about 55Hz and F10 of about 30Hz. Harmonic distortion is good for a 5.25” mid-woofer at both 86dB and 96dB output, and dynamic range/compression is reasonably well controlled up to about 96dB. Horizontal radiation of about ±60° lands right in the reviewer’s personally preferred range for soundstage width. On-axis, the sound is a little forward-leaning rather than dull, and EQ can bring back midrange fullness and a bigger sense of image spread if the stock tuning’s slightly recessed midrange isn’t to your taste. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 75.7dB.
Cons: Measured average sensitivity is notably low at about 75.7dB (well under the 78dB spec) due to a nearly 3dB dip through the midrange, and the reviewer needed serious amplification (monoblock power amps, not just a compact streaming amp) to drive them to real listening levels for bass testing. On-axis response is within only about ±3dB (a 6dB window) (not very linear) with a mid-range scoop and a bump around 1kHz that makes the sound a bit forward and less full than a neutral reference; EQ can address most of this but makes the image slightly more diffuse in exchange for added fullness. A roughly one-octave-wide diffraction dip between 3-5kHz can’t be corrected with EQ, since boosting it raises reflected energy in a band that’s already elevated off-axis. Top end rolls off fairly quickly above about 10kHz on-axis, and toeing the speakers out more than about 10° loses noticeable air and cymbal/hi-hat detail: best kept close to on-axis. Multitone distortion jumps substantially between 87dB and 96dB SPL/1m, so headroom for loud listening is limited. Vertical window is tight at about ±20°.
Full Dayton Audio OPAL1 review and specifications →
| Bass Extension (-10dB) | 30Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 2,200Hz |
| DIY Kit | No |
| Dimensions | 14”H x 7”W x 9.5”D |
| Drivers | 5.25” mid-woofer, 1” dome tweeter, dual rear passive radiators |
| Frequency Response | 32Hz - 20kHz (-3dB, half-space, manufacturer specified) |
| Impedance | 8 ohms nominal (4.3 ohms minimum @ 4.4kHz, measured, Erin’s Audio Corner) |
| Power Handling | 200W RMS (75-200W recommended amplifier power) |
| Sensitivity | 75.7dB (measured by Erin’s Audio Corner; 78dB manufacturer specified) |
| Spinorama Preference Score | 5.08 |
| Spinorama Preference Score with Perfect Sub | 6.58 |
| Weight | 20.7 lbs (9.4 kg) each |
| Woofer Cabinet | passive radiator, rear (dual) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
ELAC Uni-Fi 2.0 UB52: $599.00 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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