Short answer: the SVS Ultra Evolution Bookshelf, if you are buying new. The SVS Ultra Bookshelf ranks higher than the SVS Prime Bookshelf (#98 vs #144 of 214 bookshelf speakers) but is discontinued; its replacement, the SVS Ultra Evolution Bookshelf, is rated 4.0/5 at $1,199 and is still sold new.
The SVS Ultra Bookshelf is the better-sounding option. Noticeably more tonally neutral than the cheaper SVS Prime Bookshelf, with response staying within about -3dB/+1.5dB on average: a genuine step up in linearity for roughly double the price. Watch for: Still has a boosted upper mid-range/mid-range area, though less severe than the Prime: the reviewer suspects a baffle-step or tweeter-level issue rather than a resonance, giving mixes a slightly forward, occasionally tinny character.
The case for the SVS Prime Bookshelf: Reasonable sensitivity for the price at about 87dB, and the 6.5” woofer sits in its own dedicated sealed sub-compartment inside the cabinet for cleaner midrange/bass separation. Watch for: A scooped mid-range paired with a boosted upper mid-range creates an audibly uneven tonal balance, and there’s an additional dip in the treble around 4-5kHz that reads as slightly tinny relative to the recessed mid-range.
Buy the SVS Ultra Evolution Bookshelf, the replacement for the discontinued SVS Ultra Bookshelf; it is rated higher for sound quality than the SVS Prime Bookshelf.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| SVS Ultra Bookshelf | SVS Prime Bookshelf | |
|---|---|---|
| Price | $1,200 per pair Discontinued | $699.00 per pair |
| Ranked | #98 of 214 in Large Size Bookshelf Speakers | #144 of 214 in Large Size Bookshelf Speakers |
| Drivers | 6.5” composite glass fiber cone woofer, 1” aluminum dome tweeter | 6.5” polypropylene cone woofer with aluminum shorting ring (sealed sub-compartment), 1” aluminum dome tweeter |
| Dimensions | 14.9”H x 8.5”W x 10”D | 13.2”H x 8”W x 10.2”D (335.3 x 203.2 x 259.1 mm) |
| Weight | 19 lbs (8.6 kg) each | 15.5 lbs (7.03 kg) each |
| Impedance | 8 ohms nominal, 3.8 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87.8dB (measured average, Erin’s Audio Corner) | 87dB (measured average, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 69Hz (measured, Erin’s Audio Corner) | 72Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 48Hz (measured, Erin’s Audio Corner) | 49Hz (measured, Erin’s Audio Corner) |
| Frequency Response | 45Hz - 32kHz (manufacturer specified) | 48Hz - 25kHz ±3dB (manufacturer specified) |
| Recommended Power | 20-150W | - |
| Spinorama Preference Score | 5.63 | 5.17 |
| Spinorama Preference Score with Perfect Sub | 8.10 | 7.78 |
| DIY Kit | No | No |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: SVS Ultra Bookshelf (measured by Erin’s Audio Corner) and SVS Prime Bookshelf (measured by Erin’s Audio Corner), via spinorama.org.
Watch Them Compared
Videos and reviews that test both speakers side by side.
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The Two Speakers In Full
SVS Ultra Bookshelf: $1,200 per pair Discontinued eBay
Newer model: the SVS Ultra Evolution Bookshelf, ranked higher, estimated 4/5, released Apr 2024. See every SVS Ultra and Ultra Evolution generation.
Pros: Noticeably more tonally neutral than the cheaper SVS Prime Bookshelf, with response staying within about -3dB/+1.5dB on average: a genuine step up in linearity for roughly double the price. Slightly higher sensitivity than the Prime (about 87.8dB) with similarly wide, consistent horizontal radiation. Toeing the speakers out about 30 degrees smooths the in-room response nicely if the on-axis tonal balance runs a bit forward for your taste. Distortion and dynamics hold up well; this is a mature, well-regarded design (roughly a decade old at review time) that’s aged better than many contemporaries. Measured bass extension of 69Hz (-3dB), with a measured sensitivity of 87.8dB.
Cons: Still has a boosted upper mid-range/mid-range area, though less severe than the Prime: the reviewer suspects a baffle-step or tweeter-level issue rather than a resonance, giving mixes a slightly forward, occasionally tinny character. Bass extension is modest for the price (F3 69Hz, F10 48Hz measured): SVS is clearly counting on you pairing this with one of their subwoofers rather than expecting full-range performance from the bookshelf alone. Measured minimum impedance dips to about 3.8 ohms, so a 4-ohm-stable amplifier is recommended rather than a basic 8-ohm-only AVR. Radiation pattern is wide (around 80°), wider than the reviewer’s typical ~60° sweet spot preference, so acoustic treatment on nearby walls helps tame reflections and keep the off-axis response from diverging too much from on-axis. Discontinued; SVS replaced the Ultra line with the Ultra Evolution series.
Full SVS Ultra Bookshelf review and specifications →
| Released | Apr 2013 (13 years ago) |
|---|---|
| Bass Extension (-10dB) | 48Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 69Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.9”H x 8.5”W x 10”D |
| Drivers | 6.5” composite glass fiber cone woofer, 1” aluminum dome tweeter |
| Frequency Response | 45Hz - 32kHz (manufacturer specified) |
| Impedance | 8 ohms nominal, 3.8 ohms minimum (measured, Erin’s Audio Corner) |
| Recommended Power | 20-150W |
| Sensitivity | 87.8dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.63 |
| Spinorama Preference Score with Perfect Sub | 8.10 |
| Weight | 19 lbs (8.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
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SVS Prime Bookshelf: $699.00 per pair Amazon eBay
Same family: the SVS Prime Satellite (smaller bookshelf, estimated 3.3/5), the SVS Prime Tower (smaller floorstanding, estimated 3.6/5), the SVS Prime Pinnacle (larger floorstanding, estimated 3.8/5), the SVS Prime Center (center, rated 3.4/5) and the SVS Prime Elevation (surround, estimated 3.3/5).
Pros: Reasonable sensitivity for the price at about 87dB, and the 6.5” woofer sits in its own dedicated sealed sub-compartment inside the cabinet for cleaner midrange/bass separation. Overall response stays within about ±3dB from 80Hz-16kHz, which the reviewer calls reasonable for the price point. Wide, consistent horizontal radiation. Toeing the speakers 30 degrees off-axis smooths the in-room response noticeably if the on-axis tonal balance isn’t to your taste. Measured bass extension of 72Hz (-3dB), with a measured sensitivity of 87dB.
Cons: A scooped mid-range paired with a boosted upper mid-range creates an audibly uneven tonal balance, and there’s an additional dip in the treble around 4-5kHz that reads as slightly tinny relative to the recessed mid-range. Measured minimum impedance dips below 4 ohms (EPDR even lower), so an 8-ohm-only amplifier or AVR may struggle: a 4-ohm-stable amp or separate amplification is recommended. Bass extension is modest (F3 72Hz, F10 49Hz measured): SVS clearly designed this to be paired with one of their subwoofers rather than to stand fully alone. Compared directly against its pricier sibling, the SVS Ultra Bookshelf, in the same review, the reviewer found the Ultra noticeably more tonally neutral.
Full SVS Prime Bookshelf review and specifications →
| Bass Extension (-10dB) | 49Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 72Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 13.2”H x 8”W x 10.2”D (335.3 x 203.2 x 259.1 mm) |
| Drivers | 6.5” polypropylene cone woofer with aluminum shorting ring (sealed sub-compartment), 1” aluminum dome tweeter |
| Frequency Response | 48Hz - 25kHz ±3dB (manufacturer specified) |
| Impedance | 8 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.17 |
| Spinorama Preference Score with Perfect Sub | 7.78 |
| Weight | 15.5 lbs (7.03 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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