Hi everybody! I recently saw a youtube video on purchase of amp Amplifier to Speaker Matching Tutorial | UniqueSquared.com - YouTube. The thing is the guy says we need 50% more power than the WPC(watts per channel) of speaker. I have a Polk TSI 300 speakers (rated 20-150max watts so I assume it is a 100 watts RMS speaker) My question is does that mean I have to get 100WPC (RMS) receiver for my speakers? Right now I have Yamaha 5.1 RX-V365 receiver rated (100 WPC total 500 watts) Though not give RMS in manuel I guess I must be getting 40% lower than that since it is an entry level amp. The other thing is when I drive high volume I am able to hear all frequencies but it doesn't please my wife with a baby around they ask to low the volume.At low volume I feel completely missing something.... My biggest confusion is if i upgrade my receiver can I here the same frequencies at low volume? PLZ HELP ME GUYS