MartinLogan Motion AFX vs Polk Signature Elite ES90
The MartinLogan Motion AFX is more sensitive (87 dB vs 85 dB), so it plays louder per watt and plays lower (90 Hz vs 142 Hz). The Polk Signature Elite ES90 costs less ($449 vs $600).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| Motion AFX | Signature Elite ES90 | |
|---|---|---|
| Receivers and amps that drive it | 27 of 29, 13 after a setting change | 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.
| Motion AFX | Signature Elite ES90 | |
|---|---|---|
| Impedance | 4 Ω | 4 Ω |
| Sensitivity | 87 dB (2.83 V, 1 m) | 85 dB |
| Low end | 90 Hz | 142 Hz |
| Drivers | 1 × 19 mm, 1 × 133 mm | 1 × 25 mm, 1 × 133 mm |
| Size | 8×7×10 in | 7×7×12 in |
| Recommended amplifier power | 20–200 W | 20–150 W |
| Weight | 3.6 kg (7.9 lb) | 3.76 kg (8.3 lb) |
| MSRP | $600 a pair (MSRP, September 2026) | $449 a pair (MSRP, September 2026) |
Every spec and pairing: MartinLogan Motion AFX, Polk Signature Elite ES90.
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References
- MartinLogan Motion AFX: Spec sheet, martinlogan.com, retrieved September 15, 2026
- MartinLogan Motion AFX: Retailer listing, audioadvice.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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