Crown
Crown GLM-100
Miniature electret condenser, omnidirectional ("Great Little Mic"), with permanently attached cable and XLR connector
Approximate Some readings for this mic are uncertain; see the graphs.
Power Phantom, 12 - 48 V DC.
- Type
- Condenser (electret)
- Pattern
- Omni
- Sensitivity
- −50 dBV/Pa
- Among 204 condensers: more output than 8%
- Among 311 mics: more output than 34%
- Self-noise
- 28 dB(A)
- Among 258 condensers: quieter than 5%
- Among 272 mics: quieter than 5%
- Max SPL
- 150 dB SPL
- Among 277 condensers: takes louder sound than 92%
- Among 343 mics: takes louder sound than 91%
- Rated range
- 20 – 20k Hz
vs 16 clip-on condensers
More output than 33% of 16 clip-on condensers.
Each stripe is one clip-on condenser with a published sensitivity, and each bar counts them; further right means more output. This mic is in blue.
vs 14 clip-on condensers
Quieter than 54% of 14 clip-on condensers.
Each stripe is one clip-on condenser with a published self-noise, and each bar counts them; further right means quieter. This mic is in blue.
vs 16 clip-on condensers
Takes louder sound than 67% of 16 clip-on condensers.
Each stripe is one clip-on condenser with a published max SPL, and each bar counts them; further right means it takes louder sound. This mic is in blue.
Instruments sources recommend it for most
Proximity effect: the bass it gains up close
From the spec sheet p1 md, p. 1. Approximate
Fig. 1 "GLM-100 Frequency Response"; the specifications call the response "typical". Distance, room, 0 dB reference and smoothing not stated.
Approximate: reading error up to about 1 dB.
Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.
Polar pattern
From the spec sheet p1 md, p. 1. Approximate
Fig. 3 "GLM-100 Polar Response"; legend "20 Hz - 3.5 kHz" (solid) and "10 kHz" (dashed). Rings 0 to -20 dB. Measuring conditions not stated.
Approximate: reading error up to about 1.5 dB.
In practice
All specs
| From the spec sheet p1 md | ||
|---|---|---|
| Sensitivity | −50 dBV/Pa (3.2 mV/Pa)open circuit; also −52 dBV/Pa, catalogue (about 1986): "-72 dB re 1V/microbar". "Open Circuit Sensitivity: GLM-100: 3.2 mV/Pa* (-50 dB re 1 volt/Pa*)". -72 dB re 1 V/µbar is -52 dB re 1 V/Pa. | p. 1 |
| Self-noise | 28 dB(A)typical. "Equivalent Noise Level: GLM-100: 28 dB SPL A-weighted, typical". | |
| Max SPL | 150 dB SPL3% THD. "150 dB SPL produces 3% THD". | |
| Signal-to-noise ratio | 66 dBat 94 dB SPL | |
| Output impedance | 240 ohmbalanced. "240 ohms balanced. Recommended minimum load impedance 1000 ohms." | |
| Rated load impedance | 1000 ohmrecommended minimum | |
| Rated frequency range | 20 Hz to 20 kHztypical. "Frequency Response (typical): GLM-100: 20 Hz to 20,000 Hz." | |
| Powering | phantom, 12 - 48 V DC"Phantom power, 12 to 48 volts DC, positive voltage on pins 2 and 3 with respect to pin 1". | |
| Current draw | 1.1 mA | |
| Connector | XLR-3 (on an 8 ft permanently attached cable)"8-foot, black, permanently attached cable with rugged strain/flex relief and 3-pin pro audio connector." | |
| Weight | 27.5 gwithout connector; also 78.5, with connector. "1 ounce (27.5 grams) without connector, 2.8 ounces (78.5 grams) with connector". | |
| Finish | Black PVC housing"Materials: Black PVC housing." | |
| Supplied accessories | GLM-UM universal mount; GLM-TB tie bar; GLM-BC belt clip; GLM-WS2 windscreen | |
| Power sensitivity | -50 dB re 1 mW/Pa | |
| Polarity | Positive pressure on the diaphragm gives positive voltage on pin 2 with respect to pin 3 | |
| Operating temperature | -18 to +57 °C (0 to 135 °F) | |
| Optional accessory | Crown PH-1A battery phantom supply (battery or AC adapter; about 475 hours battery life with the GLM-100) | |
| UsesCrown | Lavalier, instruments (guitar, sax, flute, drum rims), concealed miking on film sets | |
| From the catalog | ||
| Variant | GLM-100/E: no cable connector, for direct connection to a wireless transmitter | p. 8 |
| Catalogue accessoriesabout 1986 | Included: GLM-UM universal mount, GLM-WS2 and GLM-WS3 windscreens, GLM-TM tie-bar mount with belt clip, double-sided tape. Optional: GLM-TT tie tack, GLM-DM drum, GLM-CM cymbal, GLM-HM horn and GLM-SM surface mounts, PH-1 and PH-4 phantom supplies | |
| From the spec sheet p2 md | ||
| DimensionsFig. 5 | Width .310 in (7.9 mm) at the top; .505 in (12.8 mm) and .755 in (19.2 mm) along the head; .680 in (17.3 mm) taper; cable .185 in (4.7 mm) diameter max | p. 1 |
Documents
- GLM-100 / GLM-200 Miniature Omnidirectional and Hypercardioid Microphones, spec sheet136453-4, 7/08), page 1 (ManualsDir page image
- GLM-100 / GLM-200 Miniature Omnidirectional and Hypercardioid Microphones, spec sheet136453-4, 7/08), page 2 (ManualsDir page image
- Crown Microphones: CM, PCC, PZM & GLMcatalogue scan
Copies kept by Mic Archive (manufacturers move and drop their documents). Each is © Crown, unchanged, with its original address.
Recommended for
By recording guides, engineers and mic makers, for this mic or an earlier version of it.