Use this forum to your advantage by searching the archive and seeing what other reputable members are using with your individual components. If no information is found, ask. Also, call the manufacturers. For example, If you own a particular type of speaker, call the manufacturer and ask them what they recommend for amplification. You may want to go to a show...perhaps RMAF in Denver and see what other folks are using with your gear. Instead of trial and error, ask first. That being said, trial and error is a good thing; as you have found out it is a learning experience, albeit an expensive one.