I bought this to upgrade my peavey valve king 8 royal factory speaker. The speaker change was done easily all you need is a screwdriver. There was a huge improvement of sound with this speaker. With the factory installed the sound was always a bit muddy no matter what but after installing this speaker it is like a new much better amp.
I got this speaker to replace a Gretsch Electromatic 5w valve stock speaker, (this amp circuit was also released as a fender champion i think) as it is a larger speaker i knew i would have to increase the depth of my amp to accommadate it's size so if your doing something similar be sure you have the know how and an amp with controls to the rear. Ran a few head to heads against the old speaker and this blew it out of the water stands up to my 15 watt head for jams ,loads of tone and breaks up nicely. this speaker won't disappoint for classic rock,pedals, tone hounds etc.