For over 40 years Mike Hill has been purchasing valves from top manufacturers. The valves he hand selected were used in designing some of the most popular guitar amplifiers, such as the Marshall Master Volume. By developing a trusted relationship with these companies over the years, we are able to obtain the highest quality and most reliable valves available. Every valve we receive is tested and matched, using our bespoke purpose built rig, which not only tests quality, but also burns them in using real amplifier simulation. Any valve not meeting our high standards are rejected, and sent back to the manufacturer. This rig build and valve stock came about to fulfil demand from our extensive client list, who demand the very best equipment and sound. Our valves are currently used by some of the best in the business - Brian May uses amps fitted with our valves, the result of a lengthy, trusted relationship of Mike reliably producing custom guitar equipment (see RIG BUILDS for photos). Every client we work with requests our hand selected valves.