Just to let anyone who wants to know, that I've been playing around with my 602s.
Nothing electrical (yet) - but the mods so far have, I believe produced a better bass
response. And with a Temple Bantum amp, you need all the help you can get.
1/ take out driver and crossover (careful getting the main driver out - there is a
collar that makes it difficult to remove and hold driver at the same time).
2/ remove all foam, being careful not to dislodge the tweeter horn.
3/ one roll of vibe matting from Halfords, will do the side walls (just) for both
speakers. Each side needs two strips of matting, either side of baffle.
4/ For each speaker, filled 2 sandwitch bags approx 750cl with sand and placed
them at the bottom, either side of baffle. Need to feed the front one under
the horn hole!
4/ Replace foam to sides and top, but I didn't bother with the bit of foam that
seemed to cover the crossover.
5/ Put the crossover and driver back in, making sure that the nuts/screws were
done up tight.
I think this has made a significant difference - the bass is more focused.
Most posts I've seen say that playing around with the crossovers (changing caps
etc, is a waste of time. Anyone have a different view and could recommend cap
Slap 18mm of MDF on the outside of the cabs that'll sort them out.