450 Series II Desktop Microphone

The Shure Model 450 Series II is a high output dynamic desktop microphone designed for paging and dispatching applications. This extremely rugged microphone features an omnidirectional pickup pattern and a frequency response tailored for optimum speech intelligibility. The 450 Series II microphone includes an impedance selection switch and a locking press-to-talk switch.

450 Series II includes impedance selection switch and press-to-talk switch

A rugged, high-output omnidirectional desktop mic designed for optimum speech intelligibility. Omnidirectional, Dynamic.

• Fingertip control bar or lock-on option for hands-free operation
• Omnidirectional dynamic
• Frequency response: 200 to 5,000 Hz
• Adjustable Height Dual Impedance

Type

Dynamic

Frequency Response

200 to 5,000 Hz 

  

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Polar Pattern

Omnidirectional

Impedance (at 1,000 Hz)

High Impedance: 30,000 ohms

Low Impedance: 225 ohms

Recommended Load Impedance

High Impedance: 100,000 ohms

Low Impedance: 1,000 ohms

Output Level (at 1,000 Hz, Open Circuit Voltage)

High Impedance: ­35.0 dBV/Pa* (17.8 mV)

Low Impedance: ­57.0 dBV/Pa* (1.4 mV)

*1 Pa = 94 dB SPL

Cable

2.1 m (7 ft.) four-conductor, two conductors shielded,non-detachable

Case

Two-tone gray ARMO-DUR®

Dimensions

See Figure 3

Net Weight

737 grams (1 lb., 10 oz.)

Shipping Weight

1020 grams (2 lb., 4 oz.)

Switches

Locking Press-to-Talk Switch: Activates microphone circuit and an external relay or control circuit. The microphone circuit is normally shorted.
Impedance Selection Switch: Double-pole, double-throw slide switch located in the base of the microphone.

• FAQ's for 450 Series II