These are not really the same size class, and that is the honest framing here. The Sonus Faber Sonetto III G2 ranks #168 of 188 floorstanding speakers by sound quality at $5,000; the Sonus Faber Sonetto II G2 ranks #168 of 203 bookshelf speakers by sound quality at $3,500.
The case for the Sonus Faber Sonetto III G2: The slimmest Sonetto G2 tower, a 2.5-way with the range’s 1.1” DAD Arrow Point tweeter, a 6.5” midwoofer and a 6.5” woofer that adds output only in the bass, which is rated to 38Hz. The catch: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured speakers; the rating is estimated from the measured Sonetto II G2, which showed an uneven listening window (a 4.25 Spinorama preference score).
The case for the Sonus Faber Sonetto II G2: Two-way design with a 1.125” damped Apex Dome silk tweeter and 6.5” cone woofer, using a base of concrete, aluminum, and steel with under-cabinet venting. The catch: Sounds notably bright pointed directly on-axis; toeing the speaker out about 30° reduces treble energy and sibilance meaningfully.
Buy the Sonus Faber Sonetto III G2 ($5,000) for a floorstanding speaker; the Sonus Faber Sonetto II G2 ($3,500) suits a bookshelf speaker instead.
Worth knowing: the Sonus Faber Sonetto III G2 has not been measured yet. Its rating is estimated from related models, with a likely range of 2.8 to 3.6, so treat this verdict as provisional.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Sonus Faber Sonetto III G2 | Sonus Faber Sonetto II G2 | |
|---|---|---|
| Price | $5,000.00 per pair | $3500 per pair |
| Ranked | #168 of 188 in Large Size Floorstanding Speakers Estimated | #168 of 203 in Large Size Bookshelf Speakers |
| Drivers | 1.1” (28mm) DAD Arrow Point tweeter, 6.5” midwoofer, 6.5” woofer | 1x 6.5” mid-woofer (paper cone), 1x 1.1” (28mm) DAD soft dome tweeter |
| Frequency Response | 38Hz - 40kHz (manufacturer specified) | - |
| Sensitivity | 88dB (2.83V/1m, manufacturer specified) | 87dB (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal (manufacturer specified) | 4 ohms nominal (4.2 ohms minimum, measured by Erin’s Audio Corner) |
| Crossover Frequency | 2.7kHz | - |
| Woofer Cabinet | ported, rear and down-firing | ported, front |
| Dimensions | 42”H x 11.3”W x 13.8”D (1068 x 287 x 350 mm) | 16.3”H x 8.9”W x 14”D (414.3 x 227.0 x 355.6 mm) |
| Weight | 56.9 lbs (25.8 kg) each | 38.4 lbs (17.4 kg) |
| DIY Kit | No | No |
| Bass Extension (-10dB) | - | 38Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | - | 62Hz (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | - | 4.25 |
| Spinorama Preference Score with Perfect Sub | - | 6.54 |
Related Speaker Comparisons
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- Sonus Faber Sonetto II G2 vs GR-Research NX-Studio
- Sonus Faber Sonetto II G2 vs AsciLab C6B
- Audio First Cadentia 3 vs Sonus Faber Sonetto II G2
Prices on this page were last checked October 7, 2026 at 9:25 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
Sonus Faber Sonetto III G2: $5,000.00 per pair Estimated Audio Advice eBay
Same family: the Sonus Faber Sonetto I G2 (smaller bookshelf, estimated 3/5), the Sonus Faber Sonetto II G2 (larger bookshelf, rated 3.1/5), the Sonus Faber Sonetto V G2 (larger floorstanding, ranked higher, estimated 3.3/5) and the Sonus Faber Sonetto Center G2 (center, estimated 3/5).
Pros: The slimmest Sonetto G2 tower, a 2.5-way with the range’s 1.1” DAD Arrow Point tweeter, a 6.5” midwoofer and a 6.5” woofer that adds output only in the bass, which is rated to 38Hz. Sensitivity is 88dB, and the concrete base improves stability.
Cons: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured speakers; the rating is estimated from the measured Sonetto II G2, which showed an uneven listening window (a 4.25 Spinorama preference score). The 4 ohm load needs an amplifier comfortable with low impedances.
Full Sonus Faber Sonetto III G2 review and specifications →
| Crossover Frequency | 2.7kHz |
|---|---|
| DIY Kit | No |
| Dimensions | 42”H x 11.3”W x 13.8”D (1068 x 287 x 350 mm) |
| Drivers | 1.1” (28mm) DAD Arrow Point tweeter, 6.5” midwoofer, 6.5” woofer |
| Frequency Response | 38Hz - 40kHz (manufacturer specified) |
| Impedance | 4 ohms nominal (manufacturer specified) |
| Sensitivity | 88dB (2.83V/1m, manufacturer specified) |
| Weight | 56.9 lbs (25.8 kg) each |
| Woofer Cabinet | ported, rear and down-firing |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
Sonus Faber Sonetto II G2: $3500 per pair Crutchfield eBay
Older model: the Sonus Faber Sonetto II (ranked lower, rated 3/5).
Same family: the Sonus Faber Sonetto I G2 (smaller bookshelf, estimated 3/5), the Sonus Faber Sonetto III G2 (smaller floorstanding, estimated 3.2/5), the Sonus Faber Sonetto V G2 (larger floorstanding, estimated 3.3/5) and the Sonus Faber Sonetto Center G2 (center, estimated 3/5).
Pros: Two-way design with a 1.125” damped Apex Dome silk tweeter and 6.5” cone woofer, using a base of concrete, aluminum, and steel with under-cabinet venting. Notably more neutral than Sonus Faber’s own Lumina 2, which runs 2-5dB hotter in the treble. Horizontal directivity narrows at a fairly constant, well-behaved rate rather than narrowing-then-widening-then-narrowing like some rivals (including the Lumina 2), meaning sidewall reflections match the direct sound well enough that the reviewer doesn’t recommend sidewall absorption for this speaker. The tweeter-to-woofer crossover handoff around 3kHz looks clean, suggesting a higher-order crossover than typical for the size/price class. Good dynamic range: the low end loses only about 2dB from 76dB to 96dB, otherwise holding up well. Not a difficult amplifier load (about 4.2 ohms minimum impedance). Bass extension reaches a genuine 50Hz in-room, fuller than the Lumina 2. Measured bass extension of 62Hz (-3dB), with a measured sensitivity of 87dB.
Cons: Sounds notably bright pointed directly on-axis; toeing the speaker out about 30° reduces treble energy and sibilance meaningfully. A resonance around 700Hz gives vocals a slightly nasal, hollow quality. A dip in the upper midrange (roughly 1-2kHz) reduces perceived detail and attack, while the elevated treble can read as “analytical” or “detailed” to some listeners despite being a coloration rather than true resolution. Needs more clearance from the rear wall than some rivals (about 1.5-2 feet in an ideal room, more or less depending on your specific room modes) or the 80-120Hz region can become boomy. Vertical listening window is limited to about ±10-15° from the tweeter axis. Some unexplained directivity irregularities appear around 1.2kHz and 1.6kHz, possibly port-related, along with a longer decay in the 800Hz-1600Hz range in burst-decay measurements. Multitone distortion approaches the reviewer’s 3% threshold through the midrange, though likely not obviously audible without direct A/B comparison. A resonance in the cabinet appears around 400Hz in impedance measurements.
Full Sonus Faber Sonetto II G2 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 62Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 16.3”H x 8.9”W x 14”D (414.3 x 227.0 x 355.6 mm) |
| Drivers | 1x 6.5” mid-woofer (paper cone), 1x 1.1” (28mm) DAD soft dome tweeter |
| Impedance | 4 ohms nominal (4.2 ohms minimum, measured by Erin’s Audio Corner) |
| Sensitivity | 87dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.25 |
| Spinorama Preference Score with Perfect Sub | 6.54 |
| Weight | 38.4 lbs (17.4 kg) |
| Woofer Cabinet | ported, front |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- Sonus Faber Sonetto II G2 vs KEF Q350
- Sonus Faber Sonetto II G2 vs Sonus Faber Lumina II Amator
- Sonus Faber Sonetto II G2 vs Polk R200
- Sonus Faber Sonetto II G2 vs Sonus Faber Sonetto II
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