I bought this speaker to replace the original Turbosound speaker in my little Bugera V5 Infinium combo. What a difference!
The whole speaker swap procedure took me 5 minutes. The new speaker fitted snugly. No drilling needed. I had to adjust the negative connector slightly (I just used pliers, I guess a professional would replace it or solder the wire).
The best way to describe it is to say that it opened the Bugera up. It added a lively top end and low end definition, making the Bugera sound way better and more lively than it did.
I highly recommend a speaker update if you have have this amp. When you do you realise how boring and tinny sounding the original speaker really is. I have not tied the 8" Jensen, but it was a toss-up between the two. I chose the Celestion mainly because it was in stock and I have always liked the 12" Celestion speakers I have owned.
As far as the standard pros & cons go what I have said so far all counts as pros, and to be honest I cannot think of a single con. I have now used this for a week and I am very happy I bought it.
I also changed the preamp valve, but what made the big difference was Celestion Eight.