Take one SE-5a amp, a G12H, some wood, and voila! Chris: “I made a case using the 1×12 18watt measurements for my amp, but reduced the dimensions to those more suited to a portable practice amp and made it 23x10x18 approx … the finish is rollered woodsheen paint, suggested by someone on the www.18watt.com forum”. The grille cloth is Marshall-style ‘salt and pepper’.