Lifeson used a 5150 and a Marshall combo.

[vanhalen5150]

Reading some old Alex L's gear threads on the RUSH forum last night. Found this article/interveiw pretty interesting. It's from 1994 regarding the Counterparts album(1993). Interesting what guys use in the studio but take out with them on tour as endorsements. Alex doesnt sound anything like Ed but definately liked something about that setup.

http://www.cavemanproductions.com/REVS/lerxst.html" onclick="window.open(this.href);return false;

[SteadyEddie]

Lifeson's used just about everything under the sun... Marshalls, Boogies, Gallien Kreugers, Hughes and Kettners, probably stuff we've never even heard about.