Short answer: both are discontinued, so this only matters if you are buying used. Used, the Infinity Primus 360 is the better pick: it ranks #88 of 228 floorstanding speakers by sound quality (rated 4.2/5), against #127 (rated 4.0/5) for the Monolith Encore T6. If you want one new, the Revel Concerta2 F35 ranks #31 at $900.
The Infinity Primus 360 is the deeper-bass choice. A budget three way tower with surprisingly even sound and well controlled dispersion that takes EQ well, a bargain on the used market. Its bass reaches about 53Hz before falling 3dB, against 68Hz for the Monolith Encore T6. The catch: Manufacturer-spec sensitivity of 93dB runs about 3-4dB optimistic versus the measured 89.4dB average.
What the Monolith Encore T6 does well: A heavily braced tower with three woofers and a waveguide tweeter, built for clean home theater output with a subwoofer. Watch for: Despite its size, Erin measured F3 around 68Hz, so the tower does not eliminate the need for a subwoofer.
Buy the Infinity Primus 360 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the Revel Concerta2 F35 instead.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Bass depth: the Monolith Encore T6 reaches 31.1 Hz (10 dB down) against 37 Hz for the Infinity Primus 360, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Tonal accuracy above the bass: with a subwoofer taking the low end, the Infinity Primus 360 scores 7.1 against 6.5 for the Monolith Encore T6 on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
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Specifications Side By Side
| Infinity Primus 360 | Monolith Encore T6 | |
|---|---|---|
| Price | $650 per pair Discontinued | $800 per pair Discontinued |
| Ranked | #88 of 228 in Large Size Floorstanding Speakers | #127 of 228 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | 31.1Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | ~68Hz (measured, Erin’s Audio Corner) |
| Drivers | Two 6.5” mid-woofers, 4” mid-range, 0.75” dome tweeter | Three 6.5-inch pulp woofers; 25mm waveguided silk dome |
| Sensitivity | 89.4dB (measured, Erin’s Audio Corner; 93dB manufacturer specified) | 87.8dB/2.83V/1m (manufacturer) |
| Impedance | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms nominal |
| Dimensions | 39” x 8.2” x 13” (990 x 208 x 330 mm) | 40H x 7.9W x 13.8D inches |
| Weight | 48.5 lbs (22 kg) each | 49.2 lbs (22.3 kg) each |
| Frequency Response | 38Hz - 20kHz (±3dB, Manufacturer specified) | - |
| Crossover Frequency | 350Hz & 3.3kHz, 24dB/octave | - |
| Recommended Power | 10-200W | - |
| Spinorama Preference Score | 4.97 | 4.57 |
| Spinorama Preference Score with Perfect Sub | 7.10 | 6.45 |
| DIY Kit | No | No |
Where the Ratings Come From
- Infinity Primus 360: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Monolith Encore T6: Spinorama.org measurements and reviews by Erin’s Audio Corner video.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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