bass problem

Hello. Today I bought used bookshelf speakers IQ Lady Mini S-110. I have them connected to my Onkyo TX-SR603E receiver. I'm outputting the sound from my pc using an optical cable and well I noticed that most of my bass is outputting through the main speaker instead of the bass reflex. There is...

Hello all, I bought a used Logitech Z5500 a week ago and am encountering a problem. When I listen to songs/movies, all the speakers work fine but the sub's bass comes and goes (well mostly when it goes, it doesn't come back until i turn it off and on). Sometimes, it works just fine for even an...