same wattage, different size, better design on the 500. the only problem with the 500, is that some of the parts used were less than optimal... those have been upgraded on your amp. the 550 on the other hand, was junk. lots of parts that were less than optimal, and some sections were under designed, which left it prone to failure.
post #15031 of 15215
10/1/12 at 5:21pm