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RDL ST-VCA3 Voltage Controlled Amplifier
Availability:
In StockAvailable for shipment within one business day, or pickup from our Jamaica, NY warehouse during regular business hours.
Description
The ST-VCA3 is used in applications requiring smooth audio level control from a remote control panel, potentiometer or dc voltage (0 to 10 V). Installation in series with the audio input of a power amplifier allows remote control of that amplifier™s level. For installations where it is preferred to keep the audio localized in the rack, audio controls are extended outside the rack from the ST-VCA3. Many installations benefit from avoiding long-term potentiometer wear from audio running through the potentiometer. An ST-VCA3 with external dc control provides virtual immunity from scratchy audio. Audio/video system control units often provide 0 to 10 Vdc control outputs that can directly control audio levels using an ST-VCA3. The ST-VCA3 is primarily intended for line-level attenuation a high quality utility microphone preamplifier is included in the module. If remote control of a microphone preamplifier is desired, such as a wall mounted level control for a microphone jack, the ST-VCA3 may serve as a remote controlled microphone preamplifier.
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Features:
- Audio Level Control from a DC Voltage
- Audio Level Remote Control
- Two Wire with Shield or Three Wire Control
- VCA with Microphone or Line Level Input
- VCA with Line-Level Output
- VCA with LED Metering of Operating Level
| Inputs (2): | Mic: 200 balanced 5 k unbalanced |
| Line: | 30 k bal. bridging or unbalanced |
| Input Levels (for +4 dBu output): | Mic: Ò44 dBu to Ò60 dBu (150 source) Line: -18 dBu (-20 dBV) to +4 dBu |
| Output Signal (normal rated): | +4 dBu, 150 balanced |
| Headroom: | 18 dB |
| THD+N: | Mic: < 0.05% Line: ɘ.025% (unity gain) 0.025% typical at 15 dB attenuation |
| Frequency Response: | Mic: 30 Hz to 20 kHz (۫ dB) Line: 10 Hz to 20 kHz (۪.1 dB) |
| Noise: | Mic: < -71 dB below +4 dBu output (150 source 50 dB gain) Line: <-78 dB below +4 dBu output (maximum gain) |
| CMRR: | Mic: > 60 dB Line: > 60 dB, (50 Hz to 120 Hz) |
| Control Input: | 0 to 10 Vdc or 0 to 10 k Linear |
| Attenuation Range: | 0 to 90 dB (ᢒ dB at 0 Vdc control) |
| Power Requirement: | GROUND-REFERENCED, 24 to 33 Vdc @ 50 mA |
| Dimensions: | Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm) |
The ST-VCA3 is used in applications requiring smooth audio level control from a remote control panel, potentiometer or dc voltage (0 to 10 V). Installation in series with the audio input of a power amplifier allows remote control of that amplifier™s level. For installations where it is preferred to keep the audio localized in the rack, audio controls are extended outside the rack from the ST-VCA3. Many installations benefit from avoiding long-term potentiometer wear from audio running through the potentiometer. An ST-VCA3 with external dc control provides virtual immunity from scratchy audio. Audio/video system control units often provide 0 to 10 Vdc control outputs that can directly control audio levels using an ST-VCA3. The ST-VCA3 is primarily intended for line-level attenuation a high quality utility microphone preamplifier is included in the module. If remote control of a microphone preamplifier is desired, such as a wall mounted level control for a microphone jack, the ST-VCA3 may serve as a remote controlled microphone preamplifier.
-
Features:
- Audio Level Control from a DC Voltage
- Audio Level Remote Control
- Two Wire with Shield or Three Wire Control
- VCA with Microphone or Line Level Input
- VCA with Line-Level Output
- VCA with LED Metering of Operating Level
| Inputs (2): | Mic: 200 balanced 5 k unbalanced |
| Line: | 30 k bal. bridging or unbalanced |
| Input Levels (for +4 dBu output): | Mic: Ò44 dBu to Ò60 dBu (150 source) Line: -18 dBu (-20 dBV) to +4 dBu |
| Output Signal (normal rated): | +4 dBu, 150 balanced |
| Headroom: | 18 dB |
| THD+N: | Mic: < 0.05% Line: ɘ.025% (unity gain) 0.025% typical at 15 dB attenuation |
| Frequency Response: | Mic: 30 Hz to 20 kHz (۫ dB) Line: 10 Hz to 20 kHz (۪.1 dB) |
| Noise: | Mic: < -71 dB below +4 dBu output (150 source 50 dB gain) Line: <-78 dB below +4 dBu output (maximum gain) |
| CMRR: | Mic: > 60 dB Line: > 60 dB, (50 Hz to 120 Hz) |
| Control Input: | 0 to 10 Vdc or 0 to 10 k Linear |
| Attenuation Range: | 0 to 90 dB (ᢒ dB at 0 Vdc control) |
| Power Requirement: | GROUND-REFERENCED, 24 to 33 Vdc @ 50 mA |
| Dimensions: | Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm) |
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Your home for all things pro audio—backed by expertise and experience. Connect with us today.
