Rdl St-vca3 Voltage-controlled Amplifier
- Product Code: ga4701
-
The ST-VCA3 Voltage-Controlled Amplifier from RDL provides smooth audio-level control from a remote control panel, allowing you to adjust voltage from 0 to 10VDC. Use this unit when you need to keep audio sources and components isolated in rack, but want to extend audio controls outside of the rack and eliminate scratchy audio.
The ST-VCA3 is primarily intended for line-level attenuation and includes a high-quality utility microphone preamplifier.
For Remote Audio Level Control Potentiometer or DC Voltage: 0 to 10 V Avoids Potentiometer Wear in Equipment Immunity from Scratchy Audio Line-Level or Mic-Level Attenuation Integrated High-Quality Mic Preamp
Parameters | |
---|---|
Construction | Plastic, metal |
Finish | Black |
Inputs | Inputs: x2 Mic: 200Ω balanced; 5KΩ unbalanced Line: 30KΩ balanced bridging or unbalanced Input levels: Mic: -44dBu to -60dBu (150Ω source) Line: -18dBu (-20dBV) to +4dBu |
Outputs | x1 +4dBu, 150Ω balanced |
Headroom | 18dB |
THD & Noise | Mic: < 0.05% Line: <0.025% (unity gain); 0.025% typical at 15dB attenuation |
Frequency Response | Mic: 30Hz to 20kHz (±1dB) Line: 10Hz to 20kHz (±0.1dB) |
Noise | Mic: < -71dB below +4dBu output, 150Ω source; 50dB gain) Line: <-78dB below +4dBu output |
CMRR | Mic: > 60dB Line: > 40dB (50Hz to 120Hz) |
Control | 0 to 10VDC or 0 to 10KΩ |
Attenuation Steps | 0 to 90dB (>90dB at 0VDC control) |
Dimensions | 0.7 x 3 x 1.6" (1.7 x 7.6 x 3.9cm) |
Packaging Info | |
Package Weight | 0.19 lb |
Box Dimensions (LxWxH) | 4.15 x 2.05 x 2.05" |
Smooth audio-level control from a remote control panel, allowing you to adjust voltage from 0 to 10VDC
Ideal for remotely controlling rackmount audio components
Virtually eliminates scratchy audio
Line-level attenuation and a microphone preamplifier
LEDs provide visual indicators of line status
Related Questions and Answers
Q: 1. Can an electret condenser microphone work with this unit?
A: No, the RDL ST-DA3 1 x 3 Line-Level Distribution Amplifier is for line-level audio only. It does not have a mic input or the ability to supply voltage to a condenser microphone. You would need to use a separate mic preamp or mixer to connect the mic, then connect the output from the preamp or mixer to the input on the amp.
Q: 2. Can this be used to amplify a signal over a long speaker cable? I have a 5.1 system installed, but since the left front and left back speakers have longer wires, their signal is lower. My system allows me to boost the signal to these speakers, but it's not enough. I need more signal to these two speakers.
A: The RDL ST-PA6 is designed to connect from a line level device. It is not able to be used in line with speaker level input and output.
Q: 3. this amplifier is 110 or 220v ?
A: The RDL RU-MLD4 - 1x4 Mic/Line Distribution Amplifier does require a 110 or 220V power source but rather uses a 24 to 33 VDC @ 80mA source via terminal block wiring or optional power supply. The RDL PS-24AS Switching Power Supply (BH #RDPS24AS) is available as a separate item for use with the RU-MLD4 and specifies compatibility with source connections between 100-240VAC: https://bhpho.to/39KBnoY
Q: 4. Do you have a method of delaying the audio switch for 500 MS?
A: I'm afraid not within the unit itself. Normal On: 15 us (Fast) 70 ms (Soft) is as long as it gets.
Q: 5. Is this equipment and it's power cord enabled / compatible to work in United Arab Emirates?
A: This product runs off of DC power. 24 to 33 Vdc @ 55 mA.
Q: 6. Can this be used with an 8 Ohm speaker rated at 25w RMS?
A: If you are playing only backgound music then its fine maybe if you need a speaker in a small area like a restroom or a small room then its fine. keep in mind the RDL PA6 is a mono amp 6 watts, its mainly design for a 8 watt or 12 watt 8 ohm speaker. keep volume low so you dont over heat Amp becuase your speaker is way too powerful. If you want more volume from from your speaker maybe look for a 50 watt 8ohm amp to match your speaker .
Q: 7. What is the length of travel for the center column, itself?
A: The pedestal itself (often called a center column or riser) of the E-Image Air-Controlled Pedestal Kit (B&H# EIEI7100HKIT) can be raised up or lowered over a range of 40" (101cm). At lowest, it can be 47" (119cm) and at highest it can be 87" (221cm). This is demonstrated beginning at about 6 minutes into their video on our product page or viewed on YouTube here: https://bit.ly/38sGedu
Q: 8. Is it rack mountable?
A: If you use a rack mount shelf to set it on.
Q: 9. Need a low cost leveler for FCC Part 15 FM transmitter because input levels are not even. Will this work and how is frequency response affected?
A: This will help level the microphone audio. It will boost low levels and attenuate highs. It shouldn't affect audio frequency response for speech range.
Q: 10. Is this product TAA complaint?
A: The RDL STA-2A Dual High-Gain Line Amplifier Made in the U.S.A. and is TAA Compliant.
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