Just got my VAC 450 monos back from Florida after having an on-rush circuit as well as auto-bias circuitry installed in each amp, plus a few more tweaks that remain confidential to VAC.
After only a day, I now have startlingly realistic sound, unlike anything I have heard anywhere. Tight, commanding bass, extended sweet highs, great imaging, PRAT, etc., etc. Best bass I've ever heard from a tube amp anywhere, as well as the legendary VAC mid-range, with imaging and musicality to spare. Definitely get my vote in the tube "kick-ass" category.
After only a day, I now have startlingly realistic sound, unlike anything I have heard anywhere. Tight, commanding bass, extended sweet highs, great imaging, PRAT, etc., etc. Best bass I've ever heard from a tube amp anywhere, as well as the legendary VAC mid-range, with imaging and musicality to spare. Definitely get my vote in the tube "kick-ass" category.