On the day mini-amps were invented, electric guitar players the world over rejoiced. No longer would they be house-bound when jamming out on their favourite guitar. It is a doubly wondrous day ...

[Pinomelean] has posted an Instructable on how to create a mini line following robot using ... The circuit consists of two op-amps that amplify the output of two phototransistors, which ...

Can't decide between EL34s and 6L6s? Blackstar allows you to choose between them or use them together in this four-channel beast, now available as a 100W head or 2x12 combo ...