Hello,
I have L300 's as well as 4350 's and L65 's-I have owned and sold through my shop (now closed ), Olympus's ,Century
100's, L200's,4311's and many other JBL classics.
Of all the JBL's I've experianced the L 300's are probably
the easiest to simply "plug and play " in a small room or
large and get really full enjoyable sound.
If you want to get the best out of them at low to medium
volumes use tube equipment to power them.
Most all good tube gear will drive them' and you can
choose the brand/flavour you prefer -sort of flavour
to taste.
Most McIntosh tube gear almost seems designed for JBL
with the MC30's and MC60's being especially good.
A rule of thumb here-if you want full richer sound
go for amps with tube rectification (this is especially
nice in smaller rooms)or if you want a little more
punch go for the Macs with solid state rectification
( MC225 or Mc240 etc. )although these are not quite so
seductive at lower volumes. I would also suggest
you use a good tube preamp-especially if CD's are
your main software.
Good luck,Stephen B.