Klipsch RP-500M II vs Wharfedale Diamond 12.1i
The Klipsch RP-500M II is more sensitive (92 dB vs 88 dB), so it plays louder per watt and plays lower (50 Hz vs 65 Hz). The Wharfedale Diamond 12.1i costs less ($499 vs $550).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| RP-500M II | Diamond 12.1i | |
|---|---|---|
| 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.
| RP-500M II | Diamond 12.1i | |
|---|---|---|
| Impedance | 8 Ω | 8 Ω |
| Sensitivity | 92 dB (2.83 V, 1 m) in-room | 88 dB (2.83 V, 1 m) |
| Low end | 50 Hz | 65 Hz |
| Drivers | 1 × 25 mm, 1 × 133 mm | 1 × 25 mm, 1 × 130 mm |
| Size | 7×14×11 in | 7×12×11 in |
| Weight | 5.95 kg (13.1 lb) | 6.8 kg (15 lb) |
| MSRP | $550 a pair (MSRP, September 2026) | $499 a pair (MSRP, September 2026) |
| Recommended amplifier power | — | 20–100 W |
Every spec and pairing: Klipsch RP-500M II, Wharfedale Diamond 12.1i.
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References
- Klipsch RP-500M II: Spec sheet, assets.klipsch.com, retrieved September 15, 2026
- Klipsch RP-500M II: Retailer listing, crutchfield.com, retrieved September 15, 2026
- Wharfedale Diamond 12.1i: Manufacturer product page, wharfedaleusa.com, retrieved September 15, 2026
- Wharfedale Diamond 12.1i: Owner's manual, adorama.com, retrieved September 15, 2026
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