Short answer: the SVS Prime Bookshelf for better sound quality, the Polk Reserve R100 for the lower price. The SVS Prime Bookshelf ranks #63 of 100 bookshelf speakers at $699. The Polk Reserve R100 ranks #70 at $649, $50 cheaper.
On the SVS Prime Bookshelf side: 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. Set against that: 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.
The case for the Polk Reserve R100: Compact cabinet, unusually useful bass for its size and well-controlled woofer breakup. The tradeoff: Erin measured only about 85dB sensitivity and the impedance reaches 3.6 ohms, so it is neither efficient nor an entirely benign AVR load.
Buy the SVS Prime Bookshelf if sound quality matters more than the price. Buy the Polk Reserve R100 if the price matters more than sound quality.
Specifications Side By Side
| SVS Prime Bookshelf | Polk Reserve R100 | |
|---|---|---|
| Price | $699.00 | $649/pair |
| Ranked | #63 of 100 in Large Size Bookshelf Speakers | #70 of 100 in Large Size Bookshelf Speakers |
| Drivers | 6.5" polypropylene cone woofer with aluminum shorting ring (sealed sub-compartment), 1" aluminum dome tweeter | 1" Pinnacle ring-radiator tweeter; 5.25" Turbine Cone midwoofer |
| Weight | 15.5 lbs (15.5 lbs / 7.03 kg) each | 12.2 lb each |
| Impedance | 8 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) | 3.6 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87dB (measured average, Erin’s Audio Corner) | 85dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 72Hz (measured, Erin’s Audio Corner) | 68Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 49Hz (measured, Erin’s Audio Corner) | 49Hz (measured, Erin’s Audio Corner) |
| Frequency Response | 48Hz - 25kHz ±3dB (manufacturer specified) | - |
| Dimensions | - | 12.8"H x 6.5"W x 10.2"D |
| Woofer Cabinet | - | ported, rear X-Port |
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More useful head-to-heads from the same speaker class:
- KEF Q3 Meta vs Emotiva Airmotiv B2+
- Dynaudio Emit 20 vs ELAC Debut 2.0 B6.2
- Revel Performa M22 vs Polk R200
- Polk Reserve R100 vs KEF Q350
- JBL Studio 630 vs SVS Prime Bookshelf
The Two Speakers In Full
SVS Prime Bookshelf: $699.00 Amazon
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.
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) |
| 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) |
| Weight | 15.5 lbs (15.5 lbs / 7.03 kg) each |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- SVS Prime Bookshelf vs KEF Q3 Meta
- SVS Prime Bookshelf vs ELAC Debut 2.0 B6.2
- SVS Prime Bookshelf vs Polk Monitor XT20
- SVS Prime Bookshelf vs Dynaudio Special Forty
- SVS Prime Bookshelf vs Sonus Faber Lumina II
- SVS Prime Bookshelf vs Focal Aria 906
- SVS Prime Bookshelf vs Infinity IL10
- SVS Prime Bookshelf vs Revel Performa M22
- See all 18 comparisons
Polk Reserve R100: $649/pair Amazon Polk Audio
Pros: Compact cabinet, unusually useful bass for its size and well-controlled woofer breakup. Erin measured F3/F10 points of 68Hz/49Hz, and the X-Port vent avoids much of the chuffing and pipe resonance common to budget rear ports. The 5.25-inch Turbine Cone woofer and 1-inch Pinnacle ring-radiator tweeter produce good detail at moderate levels, while listening roughly 20° off-axis reduces part of the elevated top octave.
Cons: Erin measured only about 85dB sensitivity and the impedance reaches 3.6 ohms, so it is neither efficient nor an entirely benign AVR load. The treble runs roughly 3dB above the midrange and becomes aggressive above about 85dB SPL. A directivity discontinuity through the woofer/tweeter crossover means EQ cannot fully repair the power response, and a 400Hz impedance feature plus 500Hz-1kHz response irregularity suggests a cabinet or system resonance. Substantial low-frequency compression at higher playback levels limits clean dynamics.
Full Polk Reserve R100 review and specifications →
| Bass Extension (-10dB) | 49Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 68Hz (measured, Erin's Audio Corner) |
| Dimensions | 12.8"H x 6.5"W x 10.2"D |
| Drivers | 1" Pinnacle ring-radiator tweeter; 5.25" Turbine Cone midwoofer |
| Impedance | 3.6 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 85dB/2.83V/1m (measured, Erin's Audio Corner) |
| Weight | 12.2 lb each |
| Woofer Cabinet | ported, rear X-Port |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Polk Reserve R100 vs Polk R200
- Polk Reserve R100 vs JBL XPL-90
- Polk Reserve R100 vs Emotiva Airmotiv B2+
- Polk Reserve R100 vs Revel Performa M22
- Polk Reserve R100 vs Focal Aria 906
- Polk Reserve R100 vs Sonus Faber Lumina II
- Polk Reserve R100 vs Sonus Faber Sonetto II G2
- Polk Reserve R100 vs Polk Monitor XT20
- See all 13 comparisons