JBL M644
¥ 108,000 (around 1992)
Commentary
4-channel noise gate with compact 1U size.
The threshold can be controlled over a wide range of -60 to + 20 dB.
Model Rating
| Type | 4-channel noise gate |
| Frequency response | 10 Hz (-0.5 dB) ~ 40 kHz (-3dB) |
| Distortion factor | 0.03% or Less (20 Hz to 20 kHz) |
| Maximum input level | + 24 dBu (balanced) |
| Input impedance | 20k Ω (Balanced) |
| Key input | 10k Ω (Key Input) |
| Output impedance | 102 Ω (balanced) |
| Control range | Threshold : -60dB (open) to + 20 dB Attenuation : 0 dB (open) to 90 dB Attack time : 50 μ sec to 25 msec Release time : 50 msec to 5 sec |
| External dimensions | Width 483x Height 155x Depth 451 mm |
| Weight | 2.7kg |
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