KEF Q350 vs SVS Ultra Evolution Bookshelf
The KEF Q350 is an easier load for a receiver (8 Ω vs 6 Ω) and costs less ($800 vs $1,200). The SVS Ultra Evolution Bookshelf plays lower (40 Hz vs 63 Hz).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| Q350 | Ultra Evolution Bookshelf | |
|---|---|---|
| Receivers and amps that drive it | 29 of 29 | 29 of 29 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| Q350 | Ultra Evolution Bookshelf | |
|---|---|---|
| Impedance | 8 Ω | 6 Ω |
| Sensitivity | 87 dB (2.83 V, 1 m) | 87 dB (2.83 V, 1 m) |
| Low end | 63 Hz | 40 Hz |
| Drivers | 1 × 25 mm, 1 × 165 mm | 1 × 25 mm, 1 × 165 mm |
| Size | 8×14×12 in | 9×15×12 in |
| Recommended amplifier power | 15–120 W | 20–150 W |
| Weight | 7.6 kg (16.8 lb) | 8.6 kg (19 lb) |
| MSRP | $800 a pair (MSRP, August 2025) | $1,200 a pair (MSRP, September 2026) |
Every spec and pairing: KEF Q350, SVS Ultra Evolution Bookshelf.
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References
- KEF Q350: Owner's manual, assets.kef.com, retrieved September 15, 2026
- KEF Q350: Manufacturer product page, web.archive.org, retrieved September 15, 2026
- SVS Ultra Evolution Bookshelf: Owner's manual, avstyle.nl, retrieved September 15, 2026
- SVS Ultra Evolution Bookshelf: Independent measurement, ecoustics.com, retrieved September 15, 2026
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