My brother needs about 50 feet of subwoofer cable for his Boston Acoustics 975 subs on his speakers. He had about 20 feet of Monster 200 and there was much ill defined ,boomy bass. The speakers were moved and now without a cable run ,the bass is weak.We would like to stay under $100. I'm looking at Belkin, Dayton, Sonicwave, and some other Monster cable. Any words of wisdom? Thanks.