I've been very happy with my Velodyne CHT-10 subwoofer until recently, when it began to sound awfully quiet. I've got it connected to the subwoofer pre-out on my Harman Kardon 4550 receiver, and am using direct mode (i.e. bypassing the subwoofer's internal crossover) which I've always found satisfactory. I've got my receiver configured to output just LFE to the sub, with full range frequencies output to all the other speakers. However, even in parts of movies that I know are incredibly bassy, even with the subwoofer's volume turned right up to maximum and the subwoofer volume on the receiver raised up to +10dB, all the Velodyne can manage now is a pitiful little rumble. I've just switched over from a Denon 2900 to a PS3 as my main source, which I feel has exacerbated things somewhat. You see, the Denon enabled me to boost the bass output to compensate for low bass on SACD recordings. Boosting the bass in this way gave me somewhat satisfying results from the subwoofer, even after it started to get quieter. But now, with the optical output from the PS3, the subwoofer is next to useless. I've tried disconnecting, reconnecting, resetting the receiver, checking the PS3 audio output settings, adjusting all the settings on the subwoofer, and still nothing. Can anyone suggest anything else I might try, or has my sub really given up the ghost? I hope not, as it was fairly expensive and I've only had it about 3-4 years.