I have an EP175 subwoofer that has a hard time waking up and turning on from "standby" mode. Sometimes when playing DVDs or CDs even with a lot of bass, it just won't turn on and I have to scroll through several menus on my preamp to send the test tone to it to get it to turn on. I've had this problem with it connected to two different preamps. I don't think the volume on the sub or on the preamp, or the crossover on either, makes any difference.

Any ideas?