| Passive |
| Nominal Impedance (ohms) | 8 |
| Sensitivity (dB) | 88 |
| Recommended Amp Power (min) | 20 |
| Recommended Amp Power (max) | 150 |
| Low Frequency Response (Hz) | 56 |
| High Frequency Response (Hz) | 40,000 |
| Amplification | Passive |
Sources
https://www.pcrichard.com/polk-signature-elite-es20-high-quality-bookshelf-speakers-pair-brown/ES20BROWN.html•https://audiolab.com/product/polk-signature-elite-es20-bookshelf-speaker-pair/•https://eu.horn.eu/en/LT/BRANDS/POLK_AUDIO/SIGNATURE/Signature_Elite_ES20•https://www.bhphotovideo.com/c/product/803357376-USE/polk_audio_300364_03_00_005_signature_elite_es20_two_way.html/accessories•https://listenup.com/products/signature-elite-es20-high-resolution-bookshelf-loudspeakers-for-hi-fi-listening-home-theater
| Amplifier | Match Rating | Headroom |
|---|---|---|
| Pioneer SX-1280 | Excellent | 23% |
| Topping B200 | Excellent | 33% |
| Arcam SA45 Streaming Integrated Amplifier |
Excellent |
| 20% |
| Parasound A21+ | Excellent | 100% |
| McIntosh MA7200 | Excellent | 33% |