By the time Cutler was drumming for Henry Cow in 1971, he had become a perfectly competent, albeit unconventional, drummer. The nature of Henry Cow was to experiment and explore and it was here that Cutler developed and refined his drumming techniques. It was also here that he started to electrify his drum kit. He began by attaching old telephone mouthpieces to drums and cymbals, and connecting them to an amplifier and a reverb unit. He later added a small mixer for four independent inputs. The effect was very basic: a few low-grade inputs with only equalisation and reverberation to manipulate.