Short answer: the Polk Reserve R100. It ranks #70 of 100 bookshelf speakers by sound quality at $649; the Sonus Faber Lumina II Amator ranks #77 and costs $2000, so there is not much of a tradeoff to weigh.
What the Polk Reserve R100 offers: Compact cabinet, unusually useful bass for its size and well-controlled woofer breakup. Watch for: 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 case for the Sonus Faber Lumina II Amator: Solid bass extension for a bookshelf (F3 63Hz, F10 43Hz), reaching about 50Hz in-room. The tradeoff: Very bright treble, running 3-6dB above the midrange depending on measurement angle - independently corroborated by other owners online, not just one reviewer’s opinion.
Buy the Polk Reserve R100. It ranks higher for sound quality than the Sonus Faber Lumina II Amator and costs less, so there is no real case for the other one.
If sound quality matters at all to you, skip the Sonus Faber Lumina II Amator. It ranks near the bottom of the 100 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Polk Reserve R100 | Sonus Faber Lumina II Amator | |
|---|---|---|
| Price | $649/pair | $2000 |
| Ranked | #70 of 100 in Large Size Bookshelf Speakers | #77 of 100 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | 68Hz (measured, Erin’s Audio Corner) | 63Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 49Hz (measured, Erin’s Audio Corner) | 43Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 85dB/2.83V/1m (measured, Erin’s Audio Corner) | 86.9dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Impedance | 3.6 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | 1" Pinnacle ring-radiator tweeter; 5.25" Turbine Cone midwoofer | 1.14" DAD (Damped Apex Dome) tweeter, 5.9" paper cone woofer |
| Dimensions | 12.8"H x 6.5"W x 10.2"D | 12" x 7.1" x 10.4" (304 x 180 x 263 mm) |
| Weight | 12.2 lb each | 12.8 lbs / 5.8 kg |
| Woofer Cabinet | ported, rear X-Port | Bass reflex, ported |
| Frequency Response | - | 55Hz - 24kHz (Manufacturer specified) |
| Crossover Frequency | - | 2600Hz |
| Recommended Power | - | 30W - 150W |
| Country of Origin | - | Italy (Vicenza) |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- JBL XPL-90 vs Wharfedale Diamond 9.1
- Wharfedale Linton 85 vs Polk R200
- Klipsch RP-600M vs B&W 805S
- Revel Performa M22 vs Sonus Faber Lumina II Amator
- KEF Q350 vs Sonus Faber Lumina II Amator
The Two Speakers In Full
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 |
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- 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
Sonus Faber Lumina II Amator: $2000 Crutchfield
Pros: Solid bass extension for a bookshelf (F3 63Hz, F10 43Hz), reaching about 50Hz in-room. Decent sensitivity and wide, consistent horizontal dispersion (~60-70 degrees) - better directivity than expected for a two-way design. Gorgeous, luxury-grade cabinet design.
Cons: Very bright treble, running 3-6dB above the midrange depending on measurement angle - independently corroborated by other owners online, not just one reviewer’s opinion. Causes audible sibilance and a forward, grainy character. Notably the brightest of three Sonus Faber models Erin’s Audio Corner has tested, even brighter than the brand’s own Sonetto II G2. A mechanical resonance/ringing artifact shows up around 1kHz in measurements. Needs a subwoofer for anything below about 50Hz.
Full Sonus Faber Lumina II Amator review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, Erin's Audio Corner) |
| Country of Origin | Italy (Vicenza) |
| Crossover Frequency | 2600Hz |
| Dimensions | 12" x 7.1" x 10.4" (304 x 180 x 263 mm) |
| Drivers | 1.14" DAD (Damped Apex Dome) tweeter, 5.9" paper cone woofer |
| Frequency Response | 55Hz - 24kHz (Manufacturer specified) |
| Impedance | 4 ohms nominal, 3.9 ohms minimum (measured, Erin's Audio Corner) |
| Recommended Power | 30W - 150W |
| Sensitivity | 86.9dB (2.83V/1m, measured by Erin's Audio Corner) |
| Weight | 12.8 lbs / 5.8 kg |
| Woofer Cabinet | Bass reflex, ported |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sonus Faber Lumina II Amator vs KEF Q350
- Sonus Faber Lumina II Amator vs Klipsch RP-600M
- Sonus Faber Lumina II Amator vs Pylon Jasper Monitor 18
- Sonus Faber Lumina II Amator vs Wharfedale Diamond 9.1
- Sonus Faber Lumina II Amator vs Sonus Faber Sonetto II G2
- Sonus Faber Lumina II Amator vs Triangle Borea BR03
- Sonus Faber Lumina II Amator vs B&W 805S
- Sonus Faber Lumina II Amator vs Emotiva Airmotiv B2+
- See all 12 comparisons