I just went out and upgraded my entire home theater system. I bought a Yamaha HTR-5590 receiver and have a set of take 5.2 speakers. The surround speakers sound great! The center even sounds good for most sounds like helicopters, explosions, and so on. The only problem is voices sound very low and are somewhat hard to understand on the center speaker. The receiver is set to auto so it senses the correct DTS or Dolby Digital signal. I have all my speakers set to large and I even tried small to see if it made a difference. I have 12 guage wire running to everything. What am I doing wrong? Help! Thanks!!!