Klipsch CDT-5650-C II vs Polk RC80i
The Klipsch CDT-5650-C II is more sensitive (94 dB vs 90 dB), so it plays louder per watt and costs less ($125 vs $249). The Polk RC80i plays lower (35 Hz vs 63 Hz).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| CDT-5650-C II | RC80i | |
|---|---|---|
| Receivers and amps that drive it | 27 of 29 | 27 of 29 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| CDT-5650-C II | RC80i | |
|---|---|---|
| Impedance | 8 Ω | 8 Ω |
| Sensitivity | 94 dB (2.83 V, 1 m) | 90 dB (1 W, 1 m) |
| Low end | 63 Hz | 35 Hz |
| Drivers | 1 × 25 mm, 1 × 165 mm | 1 × 25 mm, 1 × 203 mm |
| Size | 9×9×4 in | 11×11×4 in |
| Weight | 3.18 kg (7 lb) | — |
| MSRP | $125 each (MSRP, September 2026) | $249 a pair (MSRP, September 2026) |
| Recommended amplifier power | — | 20–100 W |
Every spec and pairing: Klipsch CDT-5650-C II, Polk RC80i.
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References
- Klipsch CDT-5650-C II: Spec sheet, assets.klipsch.com, retrieved September 15, 2026
- Klipsch CDT-5650-C II: Retailer listing, abt.com, retrieved September 15, 2026
- Polk RC80i: Owner's manual, polkaudio.com, retrieved September 14, 2026
- Polk RC80i: Manufacturer product page, polkaudio.com, retrieved September 14, 2026
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