by macrae11 » Mon Nov 22, 2010 3:12 pm
The bassman and the vibrolux both use Alnico Jenson speakers. For the vibrolux tone, I fell that those speakers are quite crucial to the "vibrolux" tone, whereas the bassman is still very recognizably a bassman, with a few different speaker models, at least the one's that I've heard.
All that being said the Pro Junior will give a very different feel, simply based on the amp being so different. I've only heard a PJ with the stock speaker, and one replaced with a Celestion. Can't remember if it was a greenback or not. I'm not a big fan of Eminence speakers, except for a few of their bass speakers, so I've found most Fender amps can be improved by swapping out their Eminence speaker, or the Fender brand speaker, which I think is a rebranded Eminence.
You should try out a few different external speaker cabs with varying models of speakers to see if there's one that suits your taste, before buying and installing.