Links
Metroamp Forums - Forums populated by do-it-yourself Marshall enthusiasts.
Plexi Palace - The authoritative forums on vintage Marshalls.
Gearslutz - The authoritative Pro Audio forum, featuring world reknown engineers posting regularly.
3DAudio Inc - The old yellow board, devoted to Pro Audio and boutique gear.
Studio Design - Great resource for building or enhancing your own recording studio.
TheGearPage - All about guitar gear.
JTM45 Yahoo Group - Devoted to the coveted JTM45 Marshall head.
18watt Forums - Devoted to the coveted 18 watt Marshall head.