I ran into something similar to this a couple years ago. A friend said he had trouble hearing the dialogue of his movies. When he turned up the volume, everything got louder. The voices were still lower.
Went to his home and took a listened. CD, AUX/ipod In and FM worked okay. After I got the speaker connections in phase, better. Popped in a DVD and yes, dialogue was softer muffled mush. He had set the DVD Audio to 7.1. "I want the best...." ?Best? I set the audio to 2 channel stereo. Wallah. I drew him a picture of what 3,5 and 7.1 meant. Most of the dialogue goes to the center channel. "You don't have one of them".
I don't know about your bottom end problem. I wasn't focusing on that. But I could imagine turning up the volume make it atrocious.
Went to his home and took a listened. CD, AUX/ipod In and FM worked okay. After I got the speaker connections in phase, better. Popped in a DVD and yes, dialogue was softer muffled mush. He had set the DVD Audio to 7.1. "I want the best...." ?Best? I set the audio to 2 channel stereo. Wallah. I drew him a picture of what 3,5 and 7.1 meant. Most of the dialogue goes to the center channel. "You don't have one of them".
I don't know about your bottom end problem. I wasn't focusing on that. But I could imagine turning up the volume make it atrocious.