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545SD Classic Unidyne® Instrument
Microphone |
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Product Code:
545SD
Classic Unidyne® Instrument
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The predecessor to the SM57, The
545SD Classic Unidyne® Instrument Microphone is a
dual-impedance, unidirectional, dynamic microphone.
Shipped connected for low-impedance operation, the 545SD features a
silent magnetic reed on/off switch with lock-on option. A favorite
for instrument pickup and recording, the 545SD can also be used on
lecterns in public address systems
- 545SD-LC Cable not included
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| Features |
- Exceptionally uniform cardioid
pattern minimizes feedback
- Selectable dual-impedance
operation
- Silent magnetic reed on/off
switch with lock option
- Cardioid dynamic
- Frequency response: 50 to 15,000
Hz
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| Specifications |
- Type : Dynamic
- Frequency Response : 50 to 15,000
Hz
- Polar Pattern : Cardioid
(unidirectional)--uniform with frequency, symmetrical about
axis
- Impedance
Dual. Microphone rating impedance is 150 ohms (250 ohms actual) for
connection to microphone inputs rated at 19 to 300 ohms and "High"
for connection to high-impedance microphone inputs. Wired for low
impedance as supplied. To change impedance, see sections on
lmpedance Selection and Connections in User Guide.
- Output Level (at 1,000 Hz)
Open Circuit voltage*
Low : -58.0 dB (1.3 mV)
High : -35.0 dB (17.6 mV)
*0 dB = 1 volt per Pascal (1 Pa = 94 dB SPL)
- Polarity : Positive pressure on
diaphragm produces positive voltage on pin 2 (with respect to pin
3).
- Switch : Built-in magnetic reed
on/off switch with lockplate.
- Cartridge Shock Mount : Internal
rubber vibration-isolator
- Swivel Adapter : Positive action,
adjustable through 90 degrees from vertical to horizontal, permits
easy removal for handheld use, suitable for mounting on stand with
5/8"- 27 thread
- Case : Chrome-plated die casting
with ARMO-DUR® grille and stainless steel screen
- Dimensions : See User
Guide
- Net Weight (less cable) : 255 grams
(9 oz)
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