Short answer: the PSB Imagine T65 for bass output, the Infinity Primus 360 for measured linearity at $650. The 2005 three-way Infinity, with two 6.5” mid-woofers, a 4” mid-range and a 0.75” dome tweeter, holds on-axis linearity within about +/-2dB, though its 93dB sensitivity claim runs 3-4dB optimistic against a measured 89.4dB average. The PSB at $2,699 delivers strong, extended low end but a midrange dip affects vocal clarity.
Buy the PSB Imagine T65. It is rated higher for sound quality and still sold new, while the Infinity Primus 360 is discontinued.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| PSB Imagine T65 | Infinity Primus 360 | |
|---|---|---|
| Price | $2,699 per pair | $650 per pair Discontinued |
| Ranked | #34 of 74 in Large Size Floorstanding Speakers | #40 of 74 in Large Size Floorstanding Speakers |
| Drivers | 1” titanium dome tweeter, 5.25” woven carbon fiber midrange, 2x 6.5” woven carbon fiber woofers | Two 6.5” mid-woofers, 4” mid-range, 0.75” dome tweeter |
| Crossover Frequency | 600Hz & 2000Hz, 4th-order Linkwitz-Riley | 350Hz & 3.3kHz, 24dB/octave |
| Dimensions | 38.8” x 8.4” x 13.5” (986 x 213 x 343 mm) | 39” x 8.2” x 13” (990 x 208 x 330 mm) |
| Weight | 44.1 lbs (20 kg) each | 48.5 lbs (22 kg) each |
| Impedance | 8 ohms nominal (3.3 ohms minimum measured by Erin’s Audio Corner; manufacturer specifies 4 ohms minimum) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.1dB (measured average, Erin’s Audio Corner) | 89.4dB (measured, Erin’s Audio Corner; 93dB manufacturer specified) |
| Recommended Power | 20-200W | 10-200W |
| Enclosure | Vented: dual rear slot ports, individual woofer chambers | - |
| Bass Extension (-3dB) | 47Hz (measured average, Erin’s Audio Corner) | 53Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 26Hz (measured average, Erin’s Audio Corner) | 37Hz (measured, Erin’s Audio Corner) |
| Frequency Response | 28Hz - 20kHz (±1.5dB, manufacturer specified) | 38Hz - 20kHz (±3dB, Manufacturer specified) |
| Spinorama Preference Score | 5.29 | 4.97 |
| Spinorama Preference Score with Perfect Sub | 6.51 | 7.10 |
| DIY Kit | No | No |
Related Speaker Comparisons
How PSB Imagine T65 compares with other leading options:
- PSB Imagine T65 vs KEF Blade Two Meta
- PSB Imagine T65 vs MoFi SourcePoint 888
- PSB Imagine T65 vs Revel F328Be
- PSB Imagine T65 vs KEF R5 Meta
- Revel F226Be vs PSB Imagine T65
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
PSB Imagine T65: $2,699 per pair PSB Speakers eBay
Pros: Three-way design with dual 6.5” woven carbon fiber woofers delivers genuinely strong, extended low end for a $2699 tower: among the better performers Erin has measured in this price class. Distortion shows a clean second-order character with clear separation from third-order all the way up to 96 dB, indicating a well-controlled motor. Compression data shows enhancement rather than compression below about 50-60 Hz, so the bass can sound louder as you turn it up rather than choking off. Wide, forgiving vertical listening window (about ±25°) thanks to the 3-way layout, giving more seating and placement flexibility than most towers. Plenty of dynamic headroom for home theater use or a two-channel system: 100W drove it comfortably in Erin’s room. Measured bass extension of 47Hz (-3dB), with a measured sensitivity of 85.1dB.
Cons: Noticeable dip in the midrange/crossover region that Erin flagged as affecting dialogue and vocal clarity, though he notes a couple bands of EQ smooths it out. Some horizontal dispersion mismatch (about 10-15° of ballooning between 1-3 kHz) between the midrange and tweeter can add extra perceived attack or detail if your room’s sidewalls are reflective. Dips to 4 ohms, so it wants an amplifier comfortable driving a 4-ohm load. Distortion climbs above 3% around 60 Hz at 96 dB, though it’s benign second-order distortion.
Full PSB Imagine T65 review and specifications →
| Bass Extension (-10dB) | 26Hz (measured average, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 47Hz (measured average, Erin’s Audio Corner) |
| Crossover Frequency | 600Hz & 2000Hz, 4th-order Linkwitz-Riley |
| DIY Kit | No |
| Dimensions | 38.8” x 8.4” x 13.5” (986 x 213 x 343 mm) |
| Drivers | 1” titanium dome tweeter, 5.25” woven carbon fiber midrange, 2x 6.5” woven carbon fiber woofers |
| Enclosure | Vented: dual rear slot ports, individual woofer chambers |
| Frequency Response | 28Hz - 20kHz (±1.5dB, manufacturer specified) |
| Impedance | 8 ohms nominal (3.3 ohms minimum measured by Erin’s Audio Corner; manufacturer specifies 4 ohms minimum) |
| Recommended Power | 20-200W |
| Sensitivity | 85.1dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.29 |
| Spinorama Preference Score with Perfect Sub | 6.51 |
| Weight | 44.1 lbs (20 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- PSB Imagine T65 vs Polk Audio Reserve R700
- PSB Imagine T65 vs Emotiva Airmotiv T2+
- PSB Imagine T65 vs ELAC Debut 3.0 DF63
- PSB Imagine T65 vs Polk Reserve R500
- PSB Imagine T65 vs JBL HDI-3600
- PSB Imagine T65 vs JBL Studio 698
- PSB Imagine T65 vs Arendal 1961 Tower
- PSB Imagine T65 vs Q Acoustics 5040
- See all 41 comparisons
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
- Infinity Primus 360 vs Q Acoustics 5040
- Infinity Primus 360 vs Linkwitz Lab LXmini
- Infinity Primus 360 vs Klipsch Forte IV
- Infinity Primus 360 vs Polk Reserve R500
- Infinity Primus 360 vs ELAC Debut 3.0 DF63
- Infinity Primus 360 vs KEF Q11 Meta
- Infinity Primus 360 vs Emotiva Airmotiv T2+
- Infinity Primus 360 vs Klipsch RP-5000F II
- See all 30 comparisons