Over my playing career I have owned over 10 different 5150 & 6505 series amplifiers. They are a tried and true work horse in the metal community and you have heard them on nearly every record in the genre. If you want an instant metal tone out of the box with not much EQ fiddeling then look no further. The 6505 shares the EQ between both channels as opposed to the + variant. Their gain stage tubes are also in different slots and many including myself think the 6505 is more aggressive sounding then the + model.
Tom at Sam Ash Direct
Long Island, NY.