Short answer: the ELAC Uni-Fi Reference UBR62. It ranks #65 of 222 bookshelf speakers by sound quality, rated 4.1/5, at $1,299. The SVS Ultra Evolution Bookshelf ranks #78, rated 4.0/5, at $1,199, $100 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the SVS Ultra Evolution Bookshelf: A two way bookshelf speaker with a diamond coated tweeter and deep rated bass for its size, easy to drive with most amps. The catch: Measured by Stereophile and Audioholics, but not in the Spinorama format used for this ranking, so its tonal balance and directivity can’t yet be compared directly with ranked speakers.
The case for the ELAC Uni-Fi Reference UBR62: A three way bookshelf speaker with a coaxial tweeter and midrange for stable imaging, well controlled tonality, and front ports for easy placement. Watch for: Erin measured very low 83dB/2.83V/1m sensitivity; his 110W Parasound was insufficient for the high-level test and the more powerful HINT 6 was needed.
Buy the ELAC Uni-Fi Reference UBR62. It is rated higher for sound quality, and the $100 saving on the SVS Ultra Evolution Bookshelf is not enough to make up the difference.
About the ratings: the SVS Ultra Evolution Bookshelf’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.8 to 4.2, so this verdict could change once it is measured.
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Measured Differences
- Efficiency: the SVS Ultra Evolution Bookshelf is rated at 87 dB sensitivity against 83 dB for the ELAC Uni-Fi Reference UBR62, so it plays as loud with roughly half the amplifier power.
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Specifications Side By Side
| SVS Ultra Evolution Bookshelf | ELAC Uni-Fi Reference UBR62 | |
|---|---|---|
| Price | $1,199.00 per pair | $1,299.00 per pair |
| Ranked | #78 of 222 in Large Size Bookshelf Speakers Estimated | #65 of 222 in Large Size Bookshelf Speakers |
| Drivers | 6.5” composite glass fiber cone woofer, 1” diamond-coated aluminum dome tweeter | 1” tweeter coaxial with 4” midrange; 6.5” woofer |
| Frequency Response | 40Hz-40kHz ±3dB (manufacturer specified) | - |
| Sensitivity | 87dB (2.83V/1m, manufacturer specified) | 83dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Impedance | 6 ohms nominal (manufacturer specified) | 4 ohms minimum near 50Hz (measured, Erin’s Audio Corner) |
| Woofer Cabinet | ported, rear | ported, dual front slot vents |
| Dimensions | 14.9”H x 8.7”W x 11.3”D (378 x 220 x 286 mm) | 14.1”H x 8.2”W x 13.1”D |
| Weight | 19 lbs (8.6 kg) each | 23.5 lbs (10.68 kg) each |
| Cabinet Color | piano gloss black, piano gloss white, black oak | - |
| Country | United States | - |
| Bass Extension | - | 41Hz manufacturer specified; Erin’s response-linearity graph shows limited high-output bass headroom |
| Bass Extension (-3dB) | - | 58.6Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | - | 41.9Hz (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | - | 5.44 (measured, spinorama.org) |
| Spinorama Preference Score with Perfect Sub | - | 7.7 (measured, spinorama.org) |
| DIY Kit | - | No |
Where the Ratings Come From
- SVS Ultra Evolution Bookshelf: reviews by Stereophile and Audioholics.
- ELAC Uni-Fi Reference UBR62: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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