Short answer: the ELAC Debut 3.0 DF63, if you are buying new. The Infinity Primus 360 measures as well as it (#88 vs #84 of 228 floorstanding speakers, 4.2/5 vs 4.2/5) but is discontinued, so only consider it used; the ELAC Debut 3.0 DF63 is still sold new at $1,298.
The ELAC Debut 3.0 DF63 is the more accurate option. Affordable three way floorstanding speakers with a dedicated midrange, low distortion when played loud and good dispersion for the money. Its measured preference score, a predictor of how neutral it sounds, is 5.83 against 4.97 for the Infinity Primus 360. The catch: A genuine measured resonance around 200-300Hz (visible in frequency response, impedance, and group delay) causes an audible “droning” coloration on female vocals.
The Infinity Primus 360 is the deeper-bass option. 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 71Hz for the ELAC Debut 3.0 DF63. The tradeoff: Manufacturer-spec sensitivity of 93dB runs about 3-4dB optimistic versus the measured 89.4dB average.
Buy the ELAC Debut 3.0 DF63 if you want one new; the Infinity Primus 360 is discontinued, so only look for it used.
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Measured Differences
- Bass depth: the ELAC Debut 3.0 DF63 reaches 29 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.
- Efficiency: the Infinity Primus 360 is rated at 89.4 dB sensitivity against 86.6 dB for the ELAC Debut 3.0 DF63, so it plays as loud with roughly two thirds of the amplifier power.
- Close enough not to matter: preference score with a subwoofer (7.3 vs 7.1).
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Specifications Side By Side
| ELAC Debut 3.0 DF63 | Infinity Primus 360 | |
|---|---|---|
| Price | $1,298 per pair | $650 per pair Discontinued |
| Ranked | #84 of 228 in Large Size Floorstanding Speakers | #88 of 228 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 29Hz (measured, Erin’s Audio Corner) | 37Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 71Hz (measured, Erin’s Audio Corner) | 53Hz (measured, Erin’s Audio Corner) |
| Dimensions | 43.1”H x 7.7”W x 10.6”D (1094.7 x 195.6 x 269.2 mm) | 39” x 8.2” x 13” (990 x 208 x 330 mm) |
| Impedance | 6 ohms nominal (3.4 ohms minimum, measured, Erin’s Audio Corner) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | Two 6.5” Aramid Fiber woofer, 6.5” Aramid Fiber midrange, 1” Aluminum Dome tweeter | Two 6.5” mid-woofers, 4” mid-range, 0.75” dome tweeter |
| Sensitivity | 86.6dB (measured, Erin’s Audio Corner) | 89.4dB (measured, Erin’s Audio Corner; 93dB manufacturer specified) |
| Weight | 58.2 lbs (26.4 kg) each | 48.5 lbs (22 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 5.83 | 4.97 |
| Spinorama Preference Score with Perfect Sub | 7.33 | 7.10 |
| DIY Kit | No | No |
| Frequency Response | - | 38Hz - 20kHz (±3dB, Manufacturer specified) |
| Crossover Frequency | - | 350Hz & 3.3kHz, 24dB/octave |
| Recommended Power | - | 10-200W |
Where the Ratings Come From
- ELAC Debut 3.0 DF63: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Infinity Primus 360: Spinorama.org measurements and reviews by Erin’s Audio Corner.
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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