The dbx 463X is a noise gate expander designed for recordists, mixers, and sound technicians. It features a single-slider action for quick adjustment of gating severity and an adjustable threshold point to control unwanted noise between notes or sounds. The unit includes a high-impedance input jack on the front panel for instruments and a key input for special applications like frequency-sensitive gating.
| Frequency response | 20 Hz-20 kHz +1 dB |
|---|---|
| THD | 0.2% (unity gain) |
| Equivalent input noise | -85 dBv unweighted (unity gain) |
| Maximum output | 18 dBv into 600 ohms |
| Input impedance | 391 k-ohms, single-ended |
| Output impedance | 22 ohms, single-ended |
| Power requirements | 100-120/220-240 V ac; switchable; 50-60 Hz; 7 W |
Connecting this jack to another unit creates a true rms-detecting stereo noise gate or allows pairing with a 163X for compressor/limiter configurations.
The front Hi-Z input connects to a low-noise FET preamp with gain trim for instruments, while it overrides and defeats the rear line-level input.
These 12 LEDs show in dB how much the signal is currently being gated or attenuated.