Short answer: the ELAC Uni-Fi Reference UBR62 has been measured and ranked among bookshelf speakers; the SVS Ultra Evolution Bookshelf has not been independently measured yet, so until it is, this comes down to features and price.
The case for the SVS Ultra Evolution Bookshelf: Two-way rear-ported standmount with a 6.5” composite glass fiber woofer and a 1” diamond-coated aluminium dome tweeter in a time-aligned cabinet.
On the ELAC Uni-Fi Reference UBR62 side: True three-way stand-mount using a 1-inch tweeter concentrically mounted in a 4-inch aluminum midrange plus a dedicated 6.5-inch aluminum woofer.
On paper: The SVS Ultra Evolution Bookshelf is more sensitive, 87dB against 83dB, so it needs less amplifier power to play loud.
Buy the ELAC Uni-Fi Reference UBR62 if you want a speaker whose sound quality has been measured and ranked.
Buy the SVS Ultra Evolution Bookshelf if you want higher sensitivity, and you can wait for measurements to confirm how it sounds.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| SVS Ultra Evolution Bookshelf | ELAC Uni-Fi Reference UBR62 | |
|---|---|---|
| Price | $1,199.98 per pair | $1,199 per pair |
| Ranked | - | #54 of 131 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 | 378H x 220W x 286D mm | 14.1”H x 8.2”W x 13.1”D |
| Weight | 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 |
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
SVS Ultra Evolution Bookshelf: $1,199.98 per pair SVS eBay
Older model: the SVS Ultra Bookshelf (rated 3.9/5).
Pros: Two-way rear-ported standmount with a 6.5” composite glass fiber woofer and a 1” diamond-coated aluminium dome tweeter in a time-aligned cabinet. SVS rates it at 40Hz to 40kHz (±3dB), deep bass extension for a bookshelf, with 87dB sensitivity and a 6 ohm nominal load.
Cons: 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. A rear port needs some space from the wall.
Full SVS Ultra Evolution Bookshelf review and specifications →
| Cabinet Color | piano gloss black, piano gloss white, black oak |
|---|---|
| Country | United States |
| Dimensions | 378H x 220W x 286D mm |
| Drivers | 6.5” composite glass fiber cone woofer, 1” diamond-coated aluminum dome tweeter |
| Frequency Response | 40Hz-40kHz ±3dB (manufacturer specified) |
| Impedance | 6 ohms nominal (manufacturer specified) |
| Sensitivity | 87dB (2.83V/1m, manufacturer specified) |
| Weight | 8.6 kg each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
ELAC Uni-Fi Reference UBR62: $1,199 per pair Amazon eBay
Pros: True three-way stand-mount using a 1-inch tweeter concentrically mounted in a 4-inch aluminum midrange plus a dedicated 6.5-inch aluminum woofer. Erin found the directivity and overall tonality well controlled, with dual front slot vents minimizing placement sensitivity and cabinet bracing suppressing obvious coloration. The mostly 5-ohm-or-higher load is manageable for a genuinely 4-ohm-capable amplifier, and the coherent concentric upper range supports stable imaging across seats. Measured bass extension of 58.6Hz (-3dB), with a measured sensitivity of 83dB.
Cons: 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. Impedance reaches 4 ohms near 50Hz (Erin), while woofer excursion and bass output were less capable than expected for the cabinet size. A broad 500-700Hz rise and associated lower/female-vocal coloration were audible, and the slightly subdued listening-window treble is necessary to avoid an overly bright in-room balance rather than evidence of ruler-flat axial tuning.
Full ELAC Uni-Fi Reference UBR62 review and specifications →
| Bass Extension | 41Hz manufacturer specified; Erin’s response-linearity graph shows limited high-output bass headroom |
|---|---|
| Bass Extension (-10dB) | 41.9Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 58.6Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.1”H x 8.2”W x 13.1”D |
| Drivers | 1” tweeter coaxial with 4” midrange; 6.5” woofer |
| Impedance | 4 ohms minimum near 50Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 83dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.44 (measured, spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.7 (measured, spinorama.org) |
| Weight | 23.5 lbs (10.68 kg) each |
| Woofer Cabinet | ported, dual front slot vents |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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