Klipsch R-40SA vs Polk Signature Elite ES90
The Klipsch R-40SA is an easier load for a receiver (8 Ω vs 4 Ω). The Polk Signature Elite ES90 costs less ($449 vs $675).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| R-40SA | Signature Elite ES90 | |
|---|---|---|
| Receivers and amps that drive it | 27 of 29 | 27 of 29, 13 after a setting change |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| R-40SA | Signature Elite ES90 | |
|---|---|---|
| Impedance | 8 Ω | 4 Ω |
| Drivers | 1 × 25 mm, 1 × 102 mm | 1 × 25 mm, 1 × 133 mm |
| Size | 6×7×12 in | 7×7×12 in |
| Weight | 2.8 kg (6.2 lb) | 3.76 kg (8.3 lb) |
| MSRP | $675 a pair (MSRP, September 2026) | $449 a pair (MSRP, September 2026) |
| Sensitivity | — | 85 dB |
| Low end | — | 142 Hz |
| Recommended amplifier power | — | 20–150 W |
Every spec and pairing: Klipsch R-40SA, Polk Signature Elite ES90.
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References
- Klipsch R-40SA: Spec sheet, assets.klipsch.com, retrieved September 15, 2026
- Klipsch R-40SA: Retailer listing, bhphotovideo.com, retrieved September 15, 2026
- Polk Signature Elite ES90: Spec sheet, polkaudio.com, retrieved September 15, 2026
- Polk Signature Elite ES90: Manufacturer product page, polkaudio.com, retrieved September 15, 2026
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