Short answer: the Infinity Primus 360 for measured linearity, the Emotiva Airmotiv T2+ for output and bass. The 2005 Primus 360’s three-way layout holds up remarkably well by modern standards, with on-axis linearity within about ±2dB, though its 93dB manufacturer sensitivity is 3-4dB optimistic against a measured 89.4dB average. The T2+ is a high-value three-way tower with strong output and unusually deep sealed-room bass, but its 4-ohm nominal load approaches 3 ohms near 100Hz.
Buy the Emotiva Airmotiv T2+ or the Infinity Primus 360, whichever you find used in better condition; both are discontinued. For a new speaker, start with the Revel Concerta2 F35 instead.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Emotiva Airmotiv T2+ | Infinity Primus 360 | |
|---|---|---|
| Price | $999 per pair Discontinued | $650 per pair Discontinued |
| Ranked | #35 of 74 in Large Size Floorstanding Speakers | #40 of 74 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 62Hz (measured, Erin’s Audio Corner) | 53Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 32Hz (measured, Erin’s Audio Corner) | 37Hz (measured, Erin’s Audio Corner) |
| Sensitivity | Approximately 89.5dB/2.83V/1m (measured, Erin’s Audio Corner) | 89.4dB (measured, Erin’s Audio Corner; 93dB manufacturer specified) |
| Impedance | Approximately 3 ohms minimum near 100Hz (measured, Erin’s Audio Corner) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | 32mm folded-ribbon tweeter; 5.25” midrange; dual 8” woofers | Two 6.5” mid-woofers, 4” mid-range, 0.75” dome tweeter |
| Dimensions | 42.7”H x 12.2”W x 12.3”D | 39” x 8.2” x 13” (990 x 208 x 330 mm) |
| Weight | 56.9 lbs (25.8 kg) each | 48.5 lbs (22 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.56 | 4.97 |
| Spinorama Preference Score with Perfect Sub | 7.14 | 7.10 |
| DIY Kit | No | No |
| Frequency Response | - | 38Hz - 20kHz (±3dB, Manufacturer specified) |
| Crossover Frequency | - | 350Hz & 3.3kHz, 24dB/octave |
| Recommended Power | - | 10-200W |
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Prices on this page were last checked October 2, 2026 at 10:18 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
Emotiva Airmotiv T2+: $999 per pair Discontinued Emotiva eBay
Newer model: the Emotiva Airmotiv XT2. It’s likely to perform similarly, though we don’t have measurements to confirm that yet.
Pros: High-value three-way tower with strong output and unusually deep usable sealed-room bass for the price. Erin measured F3 at 62Hz and F10 at 32Hz, with sensitivity just under 90dB/2.83V/1m. Dual 8-inch woven-fiber woofers relieve the 5.25-inch midrange, and the 32mm folded-ribbon tweeter provides broad horizontal coverage. Approximately +/-2.5dB response linearity, solid cabinet bracing and low compression allow substantial playback levels; the gradual low-frequency roll-off integrates well with either room gain or a subwoofer. Measured bass extension of 62Hz (-3dB), with a measured sensitivity of 89.5dB.
Cons: The nominal 4-ohm system approaches 3 ohms near 100Hz in Erin’s measurement, so a high-current amplifier is preferable. Horizontal and especially vertical directivity through the midrange/tweeter transition is less uniform than the best waveguided or coaxial designs; listener height and nearby reflections matter, and EQ cannot correct the narrowing mismatch. The large rear-ported cabinet needs placement clearance, and its deep F10 should not be confused with flat 30Hz output at cinema levels. Discontinued.
Full Emotiva Airmotiv T2+ review and specifications →
| Bass Extension (-10dB) | 32Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 62Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 42.7”H x 12.2”W x 12.3”D |
| Drivers | 32mm folded-ribbon tweeter; 5.25” midrange; dual 8” woofers |
| Impedance | Approximately 3 ohms minimum near 100Hz (measured, Erin’s Audio Corner) |
| Sensitivity | Approximately 89.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.56 |
| Spinorama Preference Score with Perfect Sub | 7.14 |
| Weight | 56.9 lbs (25.8 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
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Infinity Primus 360: $650 per pair Discontinued eBay
Pros: A three-way tower from 2005 (two 6.5” mid-woofers, a 4” mid-range, and a 0.75” dome tweeter, 8 ohms nominal) that holds up remarkably well by modern measurement standards: on-axis linearity is within about ±2dB, and the listening window stays consistent out to roughly ±30° horizontal and ±10° vertical off the mid-range axis. Horizontal directivity is well controlled out to about ±75° before tonality starts to drift, meaning the reflected sound in a room stays close in character to the direct sound: a speaker that takes EQ well without fighting itself. Harmonic distortion measures low at both 86dB and 96dB, and multitone distortion stays under the reviewer’s 3% threshold. Silky, smooth midrange with a rich lower-midrange/upper-bass character. No mechanical issues or surround degradation found in a 20-year-old pair, and a second unit measured within about 1-1.5dB of the first, suggesting good long-term consistency for the design. Measured bass extension of 53Hz (-3dB), with a measured sensitivity of 89.4dB.
Cons: Manufacturer-spec sensitivity of 93dB runs about 3-4dB optimistic versus the measured 89.4dB average. Bass output drops off fairly quickly below about 50Hz in-room (F3 53Hz, F10 37Hz), so a subwoofer is needed for real low-end extension. Resonances show up around 170Hz, 220Hz, and 350Hz. On-axis, the lower treble can sound a bit bright or sibilant when the speaker is aimed directly at the listener; toeing out about 10-15° (rather than the more extreme 30°) gave the best balance, and some sidewall acoustic absorption further tamed a 4-5kHz peak. Placed close to the rear wall, bass gets boomy: pulling the speakers out about a foot resolves most of it, with roughly 1.5 feet from the wall as a good compromise between bass character and typical room aesthetics. Straying beyond about 25° above or below the mid-range axis introduces audible suckout. No longer in production, so it’s a used/secondhand purchase only.
Full Infinity Primus 360 review and specifications →
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 350Hz & 3.3kHz, 24dB/octave |
| DIY Kit | No |
| Dimensions | 39” x 8.2” x 13” (990 x 208 x 330 mm) |
| Drivers | Two 6.5” mid-woofers, 4” mid-range, 0.75” dome tweeter |
| Frequency Response | 38Hz - 20kHz (±3dB, Manufacturer specified) |
| Impedance | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Recommended Power | 10-200W |
| Sensitivity | 89.4dB (measured, Erin’s Audio Corner; 93dB manufacturer specified) |
| Spinorama Preference Score | 4.97 |
| Spinorama Preference Score with Perfect Sub | 7.10 |
| Weight | 48.5 lbs (22 kg) each |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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