KEF Q250c vs Polk Reserve R400
The KEF Q250c costs less ($600 vs $699). The Polk Reserve R400 is more sensitive (89 dB vs 87 dB), so it plays louder per watt and plays lower (48 Hz vs 68 Hz).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| Q250c | Reserve R400 | |
|---|---|---|
| Receivers and amps that drive it | 29 of 29 | 29 of 29 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| Q250c | Reserve R400 | |
|---|---|---|
| Impedance | 8 Ω | 8 Ω |
| Sensitivity | 87 dB (2.83 V, 1 m) | 89 dB (2.83 V, 1 m) |
| Low end | 68 Hz | 48 Hz |
| Drivers | 1 × 25 mm, 1 × 130 mm, 2 × 130 mm | 1 × 25 mm, 2 × 165 mm |
| Size | 21×7×8 in | 24×8×14 in |
| Recommended amplifier power | 10–100 W | 40–200 W |
| Weight | 7.5 kg (16.5 lb) | 14.9 kg (32.8 lb) |
| MSRP | $600 each (MSRP, October 2025) | $699 each (MSRP, September 2026) |
Every spec and pairing: KEF Q250c, Polk Reserve R400.
Try either one in your own room.
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References
- KEF Q250c: Manufacturer product page, web.archive.org, retrieved September 15, 2026
- KEF Q250c: Manufacturer product page, international.kef.com, retrieved September 15, 2026
- Polk Reserve R400: Spec sheet, polkaudio.com, retrieved September 15, 2026
- Polk Reserve R400: Owner's manual, polkaudio.com, retrieved September 15, 2026
- Polk Reserve R400: Manufacturer product page, polkaudio.com, retrieved September 15, 2026
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