Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sound quality adequate at best

I bought the Polk RC 80i speakers for a multi-room sound system in my home. If you like classical music, where crispness and full range fidelity are important, this is not your speaker. Highs are muddy, and lows are virtually non-existent. Mid-range is adequate. I have owned Polk Audio floor speakers, and these are in no way comparable. I did a side-by-side test with some M&K S125 home theater speakers, and the Polks sounded washed out and flat by comparison. For low volume, background music these speakers are okay, but audiophiles--or those who know what a good quality speaker should sound like--will not be pleased.