Description
The Astatic 651 is a small-format squeeze-to-talk, dynamic microphone for critical communications applications. The 651 has a tailored frequency response providing clear transmission and maximum intelligibility of speech. The housing is built to withstand rough mechanical impact while the transducer resists atmospheric extremes. The 651 has a simple to operate DPDT long-life, trouble-free, leaf switch. It has a low-impedance output and is factory wired normally open. The 651 may be rewired in the field if a line shorting function is desired. The Astatic 651 is an excellent choice for any application requiring a small-format palmheld microphone for discrete or tight-mounting spaces such as life-safety systems or paging stations where small size is required. The 651 is also suited to most public address and general, multiple-use, commercial paging applications such as factories, airports, lobbies, restaurants, warehouses, etc. Features: For commercial public-address and paging applications as well as security, emergency and life safety Small size for inclusion into life-safety systems or other paging stations where small size is indicated Omnidirectional for forgiving pick-up of users that may not be committed to the mic Low impedance (600 ohms) for long cable runs and hum resistance Rugged polyester mic element resists effects of extreme temperature, moisture, acids, alkalines and solvents Durable large-gauge wire grille Molded plastic that is resistant to high impact Permanently-attached 6ft (1.8m), heavy-duty, 4-conductor coiled cord with stripped and tinned ends Conforms to RoHS Specifications: Operating Principle: Moving Coil Dynamic Polar Pattern: Omnidirectional Frequency Response: 500Hz - 8KHz Sensitivity: -49dBV (3.6mV) @ 1Pa Impedance: 600 ohms Cable: 6ft (1.8m) extended, four-conductor, two-conductor shielded, coiled Switch: DPDT momentary leaf Case: Impact-resistant plastic Dimensions: See spec sheet (pdf) Net Weight [Mass]: 4.9oz [139g] Packaged Weight [Mass]: 8.0oz [227g] RF Immunity: Meets or exceeds EN55103-2, E1, E2, E3 and E4. RoHS Compliant
