I remember reading an interview with him back in the day where he did say his Marshalls were modded. I'm not sure what he did to them, but on that first album it sounds like he's going for a Schenker tone. Later on, with Whitesnake, he did endorse the Peavey VTM's which are basically souped up JCM 800's. You can get quite a bit of variety out of them just by messing with the front panel dip switches. But yeah, he did admit to having his Marshalls modded early on.
The funny thing is, it doesn't sound like it. He wasn't really a high gain player in Vandenberg, so maybe he just had his amps EQ-eq differently. That or maybe he's got a Le Tekro type of mod where he's actually getting less gain from the amp.
Hey Thanks bro. I've been craving this tone for awhile now, gotta get a vintage marshall! Unfortunately i'll be waiting until next year. Until then i'll just tweak my JSX to be really trebly and crunch with an eq, and crank the sucker to let the EL34's shine.
Good plan. I've played through JSX's and I think you can get very close.
Some of the older Marshalls sound great but they don't sound good unless cranked. They are also so damn loud, and with the older ones, there are a lot of modded lousy sounding amps. I think I mentioned here that I got a Randall MTS and have been using the Plexi and SL+ modules; they cover about 99% of the best Marshall tones, and at lower volumes. There's lots of alternatives out there for Marshall sounding amps.