Average| Source | Info |
|---|---|
| Positive Feedback | https://www.positive-feedback.com/Issue4/polkaudio.htm |
| Stereophile Guide to Home Theater | https://www.guidetohometheater.com/speakersystems/141/ |
| Secrets of HT & HiFi | https://www.hometheaterhifi.com/volume_9_3/polk-lsi9-speakers-9-2002.html |
| Home Theater Magazine | https://www.hometheatermag.com/loudspeakers/161/ |
| Absolute Sound | Absolute Sound: Apr 2002, vol 20, iss 135, Cordesman |
| SoundStage | https://www.soundstage.com/revequip/polk_lsi9.htm |