To significantly reduce background noise and feed-back, the PM-660U features a cardioid pick-up pattern that is uniform over the entire frequency range. The dynamic microphone element has a 600 ohm balanced output and the microphone is supplied with an attached 8.2’ , four-conductor cable with stripped wire ends. Two conductors are shielded and are dedicated for the micro-phone signal. The other two unshielded conductors con- nect to an auxiliary, normally-open switch contact, used to activate external muting, priority or relay control cir-cuits. The auxiliary switch contact is closed by using the push-to-talk bar, which also turns on the micro-phone by opening a second set of contacts that nor-mally short the mic element. A locking lever is provided to keep the push-to-talk bar in the “on” position when the microphone must be kept open for an extended period.

A wire mesh grille protects the mic element and incorporates an internal wind screen to reduce popping noises from speech. Ideal for desktop or shelf mount-ing, the integral microphone stand/base is fitted with four, rubber isolated feet to reduce mechanical noise pick-up. Constructed of high impact ABS resin, the microphone is finished in a neutral dark gray with a prominent, orange push-to-talk button.

• Cardioid dynamic element.
• Elegant, space-saving integral stand design.
• Push-to-talk bar with locking lever.
• Extra switch contact for mute or relay control.
• Five year warranty.