Short answer: the Emotiva Airmotiv B2+ on value, the Sonus Faber Sonetto II G2 for build. The B2+ offers Erin’s measured 86dB average sensitivity and strong midbass punch around 120Hz, but the replacement did not deliver the neutral upgrade he expected. The Sonetto II G2 pairs a 1.125-inch damped Apex Dome silk tweeter with a 6.5-inch cone woofer on a base of concrete, aluminum, and steel, yet sounds notably bright on-axis until it is toed out about 30 degrees.
Buy the Sonus Faber Sonetto II G2. It is rated higher for sound quality and still sold new, while the Emotiva Airmotiv B2+ is discontinued.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Emotiva Airmotiv B2+ | Sonus Faber Sonetto II G2 | |
|---|---|---|
| Price | $449 per pair Discontinued | $3500 per pair |
| Ranked | #107 of 134 in Large Size Bookshelf Speakers | #106 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 66Hz (measured, Erin’s Audio Corner) | 62Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured average, Erin’s Audio Corner) | 87dB (measured, Erin’s Audio Corner) |
| Drivers | 6.5” woven-fiber woofer, 32 x 25mm folded-ribbon tweeter | 1x 6.5” mid-woofer (paper cone), 1x 1.1” (28mm) DAD soft dome tweeter |
| Impedance | 4 ohms nominal (manufacturer specified) | 4 ohms nominal (4.2 ohms minimum, measured by Erin’s Audio Corner) |
| Woofer Cabinet | ported, rear | ported, front |
| Spinorama Preference Score | 5.60 | 4.25 |
| Spinorama Preference Score with Perfect Sub | 7.96 | 6.54 |
| Dimensions | 12.8”H x 8.5”W x 11.5”D (324 x 216 x 293 mm) | 16.3”H x 8.9”W x 14”D (414.3 x 227.0 x 355.6 mm) |
| Weight | 15.7 lbs (7.1 kg) each | 38.4 lbs (17.4 kg) |
| DIY Kit | No | No |
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The Two Speakers In Full
Emotiva Airmotiv B2+: $449 per pair Discontinued eBay
Newer model: the Emotiva Airmotiv XB2, ranked higher, rated 4.2/5.
Pros: Erin measured a useful 86dB average sensitivity and strong midbass punch around 120Hz. The folded-ribbon tweeter provides very broad upper-treble radiation, and the speaker can create a spacious presentation when positioned carefully. Response and directivity remain reasonably orderly below the roughly 2kHz crossover region. The 6.5-inch woofer offers more output capability than compact 5-inch competitors, while F3/F10 of 66/43Hz leave adequate overlap for a conventional 80Hz subwoofer crossover. Horizontal directivity data makes the broad baffle-step trend amenable to partial EQ below the crossover. Measured bass extension of 66Hz (-3dB), with a measured sensitivity of 86dB.
Cons: The replacement B2+ did not deliver the neutral upgrade Erin expected. A baffle-step loss around 500Hz depresses the lower midrange while the AMT’s much wider radiation above crossover injects excess room energy, yielding a bright, forward balance and false impression of cymbal detail. The directivity discontinuity near 2kHz cannot be completely equalized. Erin measured F3 at 66Hz and F10 at 43Hz, so meaningful kick-drum fundamentals and low bass still need a subwoofer. Vertical listening tolerance is roughly +/-10 degrees, with best results between the top of the woofer and tweeter axes. Broad lateral treble energy may require careful toe-out and sidewall absorption. Despite a large cabinet, it offers limited deep-bass advantage and was not Erin’s hoped-for successor to the more linear B1+. Discontinued.
Full Emotiva Airmotiv B2+ review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 66Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 12.8”H x 8.5”W x 11.5”D (324 x 216 x 293 mm) |
| Drivers | 6.5” woven-fiber woofer, 32 x 25mm folded-ribbon tweeter |
| Impedance | 4 ohms nominal (manufacturer specified) |
| Sensitivity | 86dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.60 |
| Spinorama Preference Score with Perfect Sub | 7.96 |
| Weight | 15.7 lbs (7.1 kg) each |
| Woofer Cabinet | ported, rear |
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Sonus Faber Sonetto II G2: $3500 per pair Crutchfield eBay
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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