MODEL 566
ACHITECT'S SPECIFICATIONS
The microphone shall be Shure Model 566 or equivalent. A moving coil (dynamic) microphone with a frequency range of 40 to 15,000 Hz., this unit shall have a cardioid polar characteristic. The cancellation at the sides shall be approximately 6 db and the cancellation at the rear shall be 15 to 20 db. The microphone shall be equipped with a three-position impedance "Off" switch for adjusting the microphone rating impedance for 50 ohms and 150 ohms.
The microphone output shall be:
50 ohms, (low) impedance -57.5 db
(0 db = 1 milliwatt with 10 microbars)
150 ohms, (medium) impedance -57.5 db (0 db = 1 milliwatt with 10 microbars)
The microphone rating Gm (sensitivity) at 1,000 Hz. shall be within 3 db of the following levels.
Low impedance . . . . . . . . . . . . . . . . . . |
.-154.5 |
db |
Medium Impedance . . . . . . . . . . . . . . . |
-154.0 |
db |
EIA Standard SE-105 August 1949 |
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The microphone shall be provided with a swivel adjustable through 180.O The microphone shall be equipped with a vibration-isolation unit in combination with the stand connector. The microphone will mount on a stand having %"-27 thread.
The overall dimensions shall be 5-9/32" (134.1 mm) in height, 2-1/32 (51.5 mm) in width, and 6Y2" (165.1 mm) in depth.
0 4 Sam
OVER-ALL DIMENSIONS
FIGURE A
FREQUENCY IN HERTZ
FREQUENCY ,RESPONSE
FIGURE B
,-ROTOR TERMINAL
snlELo WHITE
BLACK
CABLE PLUG ASSEMBLY
4CASE GROUND
POSITIVE |
PRESSURE PRODUCES POSITIVE |
s |
VOLTAGE |
PIN 2 w l T n RESPECT TO PIN |
'INTERNAL CONNECTIONS
SPECIFICATIONS
Type:
Dynamic
Frequency Response:
40 to 15,000 Hz.(See Figure B)
Polar Pattern:
Cardioid (Unidirectional) pattern-Effective rejection of sound at the rear of the microphone is uniform at all frequencies, while front pickup characteristics are uniform about the axis. (See Figure D).
Microphone Rating Impedance:
Dual. Choice of 50 ohms "L" or 150 ohms "H," selected by impedance switch for connections into microphone inputs rated at 25 to 250 ohms. (See "switch" below. Factory set to 150 ohms when shipped).
Output Level:
1,000 Hz. response. |
5 |
0 ohm "L" position |
|
Model 546..................................... |
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Open Circuit Voltage..................... |
- 83.0 db* (.071 mv) |
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Power Level.................................. |
.- |
57.5 |
db'* |
EIA Microphone Rating |
-154.5 |
d b * * * |
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Gm (sensitivity) .......................... |
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Model 546....................................... |
150 ohm "H" position |
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Open Circuit Voltage...................... |
- 76.5 |
db* (.I49 mv) |
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Power Level..................................... |
- 57.5 |
db** |
|
EIA Microphone Rating |
-154.0 |
db* * * |
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Gm (sensitivity) .......................... |
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'0 db = 1 volt per microbar. |
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'*O db = 1 milliwatt with |
10 microbars. |
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***O db = EIA Standard SE-105, August |
1949. |
Switch:
lmpedance selection switch with center position "OFF." May be used with "Tamper-proof" cover, or accessory (included) "ON-OFF" knob.
Swivel:
Positive |
acti:n |
life-time swivel permits tilting of head |
through |
180. |
|
Shock Mount:
Special vibration-isolation of rubber construction.
Case:
Chrome-plated die-cast case and "Armo-Dur."
Cable:
20-foot (6.1 m) two conductor shielded with a professional three-pin female audio connector on microphone end designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) series Qr equivalent connector.
Dimensions:
See Figure A
Net Weight Less Cable:
1Y i pounds (567 grams)
FIGURE C |
FIGURE D |