Crown GLM100 Miniature Omnidirectional Condenser Professional Microphone
The Crown® GLM or “Great Little Mic” is a
miniature electret condenser microphone
designed for professional recording and
sound reinforcement. It offers the quality of large
studio microphones, yet is nearly invisible in use.
The GLM can be attached to an acoustic guitar,
sax, fl ute or the performer's face to allow freedom
of movement. It can be attached to drum rims to
pick up a drum set without the unsightly clutter of
boom stands. These attachments can be made using
the included mounting hardware or tape. Used
as a lavalier microphone, or hidden on a fi lm set,
the GLM disappears in use yet provides excellent
sound quality.
The GLM-100 is an omnidirectional mic with a
low-impedance balanced XLR-type output, powered
by 12 to 48V phantom power.
The GLM-100E is an omnidirectional mic for wireless
use. It has a medium impedance unbalanced,
unterminated output and is powered by 1.1 to 20
VDC, unipolar or bipolar.
The GLM-200 is a hypercardioid mic with a lowimpedance
balanced XLR-type output, powered by
12 to 48V phantom power.
The omnidirectional GLM-100 or GLM-100E are
the best choice if you need:
• Less wind noise
• Less pickup of mechanical vibration
• Deep low-frequency response down to 20 Hz
• 150 dB maximum SPL
• Smoother frequency response
The hypercardioid GLM-200 is the best choice if
you need:
• Rejection of background noise, room acoustics,
feedback, and sounds behind the microphone.
The GLM-100 or GLM-100E may have adequate
rejection of those unwanted sounds if they are
used close to the sound source.
Made of a rugged, resilient space-age material, the
GLM’s molded housing is designed to resist damage
from demanding professional use.
Performance benefi ts of the GLM include: a wide,
smooth frequency response; excellent transient
response; and minimal off-axis coloration.
The GLM’s housing is designed to improve the
high-frequency response of the microphone capsule.
In contrast, the frequency response of large
microphone capsules often is degraded by the
microphone housing (due to sound diffraction).
Included with the GLM-100 and GLM-200 are a
GLM-UM Universal Mount, a GLM-TB Tie Bar,
GLM-BC Belt Clip, and a GLM-WS2 Windscreen.
Included with the GLM-100E are a GLM-TB Tie Bar
and GLM-WS2 Windscreen.
Specifications
Type: Miniature condenser.
Element: Electret condenser.
Frequency Response (typical):
GLM-100 and GLM-100E: 20 Hz to 20,000 Hz.
GLM-200: 60 Hz to 20,000 Hz.
Polar Pattern:
GLM-100 and GLM-100E: Omnidirectional
GLM-200: Hypercardioid.
Impedance:
GLM-100: 240 ohms balanced. Recommended
minimum load impedance 1000 ohms.
GLM-100E: 3500 ohms unbalanced with unipolar
powering, 1140 ohms unbalanced with bipolar
powering. Recommended minimum load impedance
8000 ohms.
GLM-200: 100 ohms, balanced. Recommended
minimum load impedance 1000 ohms.
Open Circuit Sensitivity:
GLM-100: 3.2 mV/Pa*(–50 dB re
1 volt/Pa*)
GLM-100E: 8 mV/Pa* (–42 dB re
1 volt/Pa*)
GLM-200: 6 mV/Pa* (–44.5 dB re
1 volt/Pa*).
Power Sensitivity:
GLM-100: –50 dB re 1 mW/Pa*.
GLM-200: –40.5 dBm/Pa*.
Equivalent Noise Level:
GLM-100 and GLM-100E: 28 dB SPL
A-weighted, typical
(0 dB = .0002 dyne/cm2).
GLM-200: 31 dB SPL A-weighted, typical
(0 dB = .0002 dyne/cm2).
S/N Ratio:
GLM-100 and GLM-100E: 66 dB at 94 dB SPL.
GLM-200: 63 dB at 94 dB SPL.
Maximum Sound Pressure Level:
GLM-100: 150 dB SPL produces 3% THD.
GLM-100E: 148 dB SPL produces 3% THD with
bipolar power; 120 dB SPL produces 3% THD with
unipolar power.
GLM-200: 131 dB SPL produces 3% THD.
Polarity:
GLM-100 and GLM-200: Positive pressure on the
diaphragm produces positive voltage on pin 2 with
respect to pin 3 of output connector.
GLM-100E: Positive pressure on the diaphragm
produces positive voltage on white lead with
respect to shield.
Operating Voltage:
GLM-100 and GLM-200: Phantom power, 12 to
48 volts DC, positive voltage on pins 2 and 3 with
respect to pin 1 of output connector.
GLM-100E: Unipolar powering is +1.1 to 20 VDC
on red lead relative to shield. White lead is audio.
Bipolar powering is + voltage on red lead and
– voltage on white lead relative to shield.
Current Drain:
GLM-100: 1.1 mA.
GLM-100E: 25 microamperes (unipolar power);
0.5 milliamperes (bipolar power).
GLM-200: 1.4 mA.
Materials: Black PVC housing.
Cable:
GLM-100 and GLM-200: 8-foot, black, permanently
attached cable with rugged strain/fl ex relief
and 3-pin pro audio connector.
GLM-100E: 4-foot, black, two-conductor shielded
cable with no connector. White: audio, red: B+,
shield: ground.
Weight: 1 ounce (27.5 grams) without connector, 2.8
ounces (78.5 grams) with connector.
Dimensions: See Fig. 5 on other side.
Included Accessories:
GLM-100 and GLM-200: GLM-UM Universal
Mount, GLM-TB Tie Bar, GLM-BC Belt Clip, and a
GLM-WS2 Windscreen.
GLM-100E: GLM-TB Tie Bar and GLM-WS2
Windscreen.
Optional Accessories: Crown PH-1A Battery Phantom
Supply (battery or AC adapter powered, single
channel, 475 hours battery life with
GLM-100, 375 hours battery life with GLM-200).
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.
Crown GLM100 Miniature Omnidirectional Condenser Professional Microphone |
