ELAC DF63 vs Polk Reserve R500
The ELAC DF63 is more sensitive (87.5 dB vs 87 dB), so it plays louder per watt, plays lower (46 Hz vs 49 Hz) and costs less ($649 vs $699). The Polk Reserve R500 is an easier load for a receiver (8 Ω vs 4 Ω).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| DF63 | Reserve R500 | |
|---|---|---|
| Receivers and amps that drive it | 28 of 29, 14 after a setting change | 29 of 29 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| DF63 | Reserve R500 | |
|---|---|---|
| Impedance | 4 Ω | 8 Ω |
| Sensitivity | 87.5 dB (2.83 V, 1 m) | 87 dB (2.83 V, 1 m) |
| Low end | 46 Hz | 49 Hz |
| Drivers | 1 × 25 mm, 2 × 165 mm, 1 × 165 mm | 1 × 25 mm, 2 × 133 mm |
| Size | 8×43×11 in | 10×41×14 in |
| Recommended amplifier power | 30–180 W | 25–200 W |
| Weight | 17.6 kg (38.8 lb) | 17.7 kg (39 lb) |
| MSRP | $649 each (MSRP, September 2026) | $699 each (MSRP, September 2026) |
Every spec and pairing: ELAC DF63, Polk Reserve R500.
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References
- ELAC DF63: Owner's manual, elac.com, retrieved September 15, 2026
- ELAC DF63: Retailer listing, worldwidestereo.com, retrieved September 15, 2026
- ELAC DF63: Retailer listing, headphones.com, retrieved September 15, 2026
- Polk Reserve R500: Spec sheet, polkaudio.com, retrieved September 15, 2026
- Polk Reserve R500: Owner's manual, polkaudio.com, retrieved September 15, 2026
- Polk Reserve R500: Manufacturer product page, polkaudio.com, retrieved September 15, 2026
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