Reply to knobs that go to 11

My midi controller just isn't loud enough; I'm looking for knobs that go to 11 so I can get that extra volume over the other DJs. I was able to find knobs for guitars like this http://acapella.harmony-central.com/...%28go-to-11%29 but the hole is just a millimeter too small for the pots that are commonly used on midi controllers. Doesn't anybody make knobs that go to 11 for regular pots? I can't hear my midi controller!!