Sennheiser E935 The Sennheiser Evolution E935 is a cardioid vocal stage microphone specially designed to perform under pressure while cutting through the mix with its high output. Made for the working musician. Excellent sound results guaranteed, day to day, 365 days a year. Its balanced frequency range qualifies the e 935 for songs of every genre. It clearly gives the voice more space and positions it cleanly in front of loud instruments.