AVS Addicted Member
Join Date: Jan 2001
Location: Detroit, Michigan USA
Mentioned: 1 Post(s)
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That is a classic sign of problematic poor room acoustics and / or a sub that just cannot handle the lowest frequencies. When you have to turn up the dialog, you either have a high noise floor and / or a dip in the frequencies where vocals are... so consequently you have to increase the volume to bring up those vocal frequencies in order to hear them - thereby raising your sub levels s well. Then the subs nearly blow out at a dynamic scene. EQing yoyur subs might to the most to help if all else seems good.
This is a home theater site for enthusiast. Your problem is in many ways the impetus for most here who spend the $$ to improve their rooms (e.g. better speaker placement, digital signal processing, room correction, acoustical materials, and professional audio calibration.
I've spent $$$ acoustically treating my room, adding digital signal processing and EQ, having it professionally calibrated and buying subs that really can't blow out at most any level. When you get all things right, you place your volume at a level you prefer and never need to touch it. Good luck!
There are more than a handful of [op amps] that sound so good that most designers want to be using them as opposed to discreet transistors. Dave Reich, Theta 2009