Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Sonus Faber Sonetto III G2 ranks #168 of 188 floorstanding speakers by sound quality at $5,000; the Sonus Faber Sonetto I G2 ranks #107 of 160 bookshelf speakers by sound quality at $2,500.
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 tradeoff: 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).
Why pick the Sonus Faber Sonetto I G2: The smallest standmount in the Sonetto G2 range, with the same 1.1” DAD Arrow Point tweeter as the measured Sonetto II G2 above a 5” natural fiber midwoofer, crossed over at 2.1kHz. 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).
Buy the Sonus Faber Sonetto III G2 at $5,000 if you want a floorstanding speaker. Buy the Sonus Faber Sonetto I G2 at $2,500 if you want a bookshelf speaker instead.
About the ratings: neither speaker has been measured yet, so both ratings are estimated from measured siblings and predecessors (likely ranges: Sonus Faber Sonetto III G2 2.8 to 3.6; Sonus Faber Sonetto I G2 2.6 to 3.4). Treat this verdict as provisional.
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Specifications Side By Side
| Sonus Faber Sonetto III G2 | Sonus Faber Sonetto I G2 | |
|---|---|---|
| Price | $5,000.00 per pair | $2,500.00 per pair |
| Ranked | #168 of 188 in Large Size Floorstanding Speakers Estimated | #107 of 160 in Medium Size Bookshelf Speakers Estimated |
| Drivers | 1.1” (28mm) DAD Arrow Point tweeter, 6.5” midwoofer, 6.5” woofer | 1.1” (28mm) DAD Arrow Point tweeter, 5” midwoofer |
| Frequency Response | 38Hz - 40kHz (manufacturer specified) | 52Hz - 40kHz (manufacturer specified) |
| Sensitivity | 88dB (2.83V/1m, manufacturer specified) | 86dB (2.83V/1m, manufacturer specified) |
| Impedance | 4 ohms nominal (manufacturer specified) | 4 ohms nominal (manufacturer specified) |
| Crossover Frequency | 2.7kHz | 2.1kHz |
| 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) | 14.8”H x 7.9”W x 12”D (377 x 200 x 304 mm) |
| Weight | 56.9 lbs (25.8 kg) each | 18.5 lbs (8.4 kg) each |
| DIY Kit | No | No |
Related Speaker Comparisons
More top alternatives to Sonus Faber Sonetto I G2:
- Sonus Faber Sonetto III G2 vs Sonus Faber Sonetto II
- Sonus Faber Sonetto III G2 vs Sonus Faber Sonetto II G2
- Sonus Faber Sonetto II G2 vs Sonus Faber Sonetto I G2
- Sonus Faber Sonetto V G2 vs Sonus Faber Sonetto I G2
- Sonus Faber Sonetto I G2 vs Sonus Faber Sonetto II
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 I G2: $2,500.00 per pair Estimated Audio Advice eBay
Same family: the Sonus Faber Sonetto II G2 (larger bookshelf, rated 3.1/5), 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: The smallest standmount in the Sonetto G2 range, with the same 1.1” DAD Arrow Point tweeter as the measured Sonetto II G2 above a 5” natural fiber midwoofer, crossed over at 2.1kHz. The front-facing port lets it sit nearer a wall, and the lute-shaped wood cabinet with leather top and concrete base is finished to a high standard.
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). Sensitivity is 86dB into a 4 ohm load and bass is rated only to 52Hz, so pair it with a subwoofer and a solid amplifier.
Full Sonus Faber Sonetto I G2 review and specifications →
| Crossover Frequency | 2.1kHz |
|---|---|
| DIY Kit | No |
| Dimensions | 14.8”H x 7.9”W x 12”D (377 x 200 x 304 mm) |
| Drivers | 1.1” (28mm) DAD Arrow Point tweeter, 5” midwoofer |
| Frequency Response | 52Hz - 40kHz (manufacturer specified) |
| Impedance | 4 ohms nominal (manufacturer specified) |
| Sensitivity | 86dB (2.83V/1m, manufacturer specified) |
| Weight | 18.5 lbs (8.4 kg) each |
| Woofer Cabinet | ported, front |
- 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