Short answer: the Emotiva Airmotiv XB2. It ranks #40 of 130 bookshelf speakers by sound quality at $549; the ATC SCM19 ranks #119 and costs $3750, so there is little reason to consider the other one.
What the Emotiva Airmotiv XB2 offers: Very neutral, linear frequency response at the recommended toe-out angle, with better directivity than the similarly-priced ELAC DB63. Decent bass extension for a bookshelf (F3 at 62Hz). AMT folded-ribbon tweeter with a rotating waveguide for placement flexibility. Great value - rated a top-three performer for the money by Erin’s Audio Corner. Watch for: Slight recessed upper-midrange around 2kHz from the tweeter-to-woofer handoff. Sounds noticeably bright pointed directly at the listener - needs toeing out 10-20 degrees, crossfiring behind the head, for the most linear result. Elevated multi-tone distortion at higher output leads to some grainy, compressed mids when pushed. Irregular compression deviations affect dynamics at higher volume. Needs a subwoofer for real bass authority.
What the ATC SCM19 offers: Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance. Sealed (unported) cabinet avoids port noise and resonance, and the extremely dense, heavy-duty enclosure (17.8kg/39lb each) reflects ATC’s pro-audio build standards. Watch for: Some stored energy resonance around 500-700hz, 4dB bump around 700hz. Not recommended for the price. CEA2034 spinorama and predicted in-room response both show a very uneven overall balance - a broad accentuation from midrange to treble paired with too little bass - along with directivity error. At 96dB SPL/1m, harmonic distortion tied to the 500-700Hz resonance rises to a level the reviewer says “should not be there.”
Buy the Emotiva Airmotiv XB2. It ranks higher for sound quality than the ATC SCM19 and costs less, so there is no real case for the other one.
Skip the ATC SCM19 if sound quality matters to you. It ranks near the bottom of the 130 bookshelf speakers.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Emotiva Airmotiv XB2 | ATC SCM19 | |
|---|---|---|
| Price | $549 per pair | $3750 per pair |
| Ranked | #40 of 130 in Large Size Bookshelf Speakers | #119 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) | 34Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 62Hz (measured, Erin's Audio Corner) | 60Hz (measured, Audio Science Review) |
| Dimensions | 12.8" x 8.5" x 11.5" (325 x 216 x 292 mm) | 17.2"H x 10.4"W x 11.8"D (436.9 x 264.2 x 299.7 mm) |
| Impedance | 4 ohms nominal (safe with 8-ohm rated amps) | 6 ohms |
| Sensitivity | 86dB (2.83V/1m, Manufacturer specified) | 85dB (measured, Audio Science Review) |
| Drivers | 1x 6" woven cone woofer, 1x 25x32mm AMT folded ribbon tweeter | 5.9" Super Linear Magnet cone woofer, 1" soft dome tweeter |
| Weight | 18.1 lbs (8.2 kg) | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | Bass reflex, rear ported | sealed |
| Frequency Response | 48Hz - 27kHz (+3/-3dB, Manufacturer specified) | - |
| Crossover Frequency | 2.6kHz | - |
| Power Handling | 125W continuous, 200W peak | - |
| Spinorama Preference Score | 4.78 | 3.79 |
| Spinorama Preference Score with Perfect Sub | 7.06 | 6.21 |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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
Emotiva Airmotiv XB2: $549 per pair Emotiva eBay
Pros: Very neutral, linear frequency response at the recommended toe-out angle, with better directivity than the similarly-priced ELAC DB63. Decent bass extension for a bookshelf (F3 at 62Hz). AMT folded-ribbon tweeter with a rotating waveguide for placement flexibility. Great value - rated a top-three performer for the money by Erin’s Audio Corner. Measured bass extension of 62Hz (-3dB).
Cons: Slight recessed upper-midrange around 2kHz from the tweeter-to-woofer handoff. Sounds noticeably bright pointed directly at the listener - needs toeing out 10-20 degrees, crossfiring behind the head, for the most linear result. Elevated multi-tone distortion at higher output leads to some grainy, compressed mids when pushed. Irregular compression deviations affect dynamics at higher volume. Needs a subwoofer for real bass authority.
Full Emotiva Airmotiv XB2 review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 62Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 2.6kHz |
| Dimensions | 12.8" x 8.5" x 11.5" (325 x 216 x 292 mm) |
| Drivers | 1x 6" woven cone woofer, 1x 25x32mm AMT folded ribbon tweeter |
| Frequency Response | 48Hz - 27kHz (+3/-3dB, Manufacturer specified) |
| Impedance | 4 ohms nominal (safe with 8-ohm rated amps) |
| Power Handling | 125W continuous, 200W peak |
| Sensitivity | 86dB (2.83V/1m, Manufacturer specified) |
| Spinorama Preference Score | 4.78 |
| Spinorama Preference Score with Perfect Sub | 7.06 |
| Weight | 18.1 lbs (8.2 kg) |
| Woofer Cabinet | Bass reflex, rear ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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ATC SCM19: $3750 per pair Tmraudio eBay
Pros: Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance. Sealed (unported) cabinet avoids port noise and resonance, and the extremely dense, heavy-duty enclosure (17.8kg/39lb each) reflects ATC’s pro-audio build standards. Measured bass extension of 60Hz (-3dB), with a measured sensitivity of 85dB.
Cons: Some stored energy resonance around 500-700hz, 4dB bump around 700hz. Not recommended for the price. CEA2034 spinorama and predicted in-room response both show a very uneven overall balance - a broad accentuation from midrange to treble paired with too little bass - along with directivity error. At 96dB SPL/1m, harmonic distortion tied to the 500-700Hz resonance rises to a level the reviewer says “should not be there.”
Full ATC SCM19 review and specifications →
| Bass Extension (-10dB) | 34Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 60Hz (measured, Audio Science Review) |
| Dimensions | 17.2"H x 10.4"W x 11.8"D (436.9 x 264.2 x 299.7 mm) |
| Drivers | 5.9" Super Linear Magnet cone woofer, 1" soft dome tweeter |
| Impedance | 6 ohms |
| Sensitivity | 85dB (measured, Audio Science Review) |
| Spinorama Preference Score | 3.79 |
| Spinorama Preference Score with Perfect Sub | 6.21 |
| Weight | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | sealed |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons