Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Left wanting

I have always favored Pioneer products because I am usually very satisfied, however unfortunately l find mysel disappointed with this product. The sound when watching a movie or music etc is without any real depth. What disappointed me most was that there was practically no bass which is, to me the most important effect especially with movies in DTS. I found myself using my old faithful stereo corded headphones and even without surround effects the deep bass and sound in general more than made up for it. I am disapointed especially with how much money l spent.