Not if it sounds good to you. My mains are good to about 35, and I crossed them at 50 for a long time, and even tried 100. I also rarely DONT use my subs. "Direct" is just a little too...dull. For tv/movies the whole system is on too. Yep, even wheel of fortune,etc lol. To your question though, set it where you want to. The only thing is without the subs on the mains mains will just have less bottom end, and it sounds like for mamma, that's ok. Then when papa comes home it's game on!