Dynamic Supercardioid Guitar Amplifier Microphone. Building on the performance and popularity of the Evolution 609 and legendary MD 409 dynamic microphones Sennheiser has re-engineered the e609's capsule for a punchier sound with more clarity to better capture the raw energy of guitar amps and loud brass instruments. Musicians and engineers flocked to the e609 due to its distinctive side-address design supercardioid pickup pattern and famous low-mid growl. The tonal character has been tailored to more closely match that of the original MD 409 and cosmetically the new mic will be identified by the silver front grille which will also help to orient the microphone correctly even in dim stage lighting. The frequency response of the e609 Silver is 40Hz to 18kHz; sensitivity is 1.5mV/Pa; and nominal impedance is 350 Ohms.