I have a two-channel silver face of uncertain vintage and I love it. I have, however, had a tough time getting predictable, musical-sounding feedback with it. I recently started using a 16 ohm cab and, while my volume is reduced, the feedback sounds WAY better. And the gigs I play are all club gigs, so I'll miss the added volume. Just thought I'd add my bit - I'm a newbie and I love the site.
best,
keith