The RU-ASX4D is a four channel stereo audio selector with input gain adjustments and output level metering. The inputs and outputs are connected on rear-panel detachable terminal blocks.
Each of the four stereo line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a rear panel screwdriver-adjustable input gain trimmer. Input signal levels between -15 dBV and +8 dBu may be set to the proper operating level as indicated by a stereo dual-LED VU meter. This assures ample headroom at all normal operating levels. The module is equipped with two identical dual-led VU meters, one on the front panel, the other on the rear panel. The maximum input level is +25 dBu.
The RU-ASX4D was designed for absolute silent switching of audio signals using only solid-state switching circuitry.
Rear-panel DIP switches are provided to permanently activate the remote control terminals, to select the remote control mode (sequential or individual source selection), and upon power-up a return to either a pre-programmed source or to the last source used. The pre-programmed source is stored when the module is installed.
The RU-ASX4D offers exceptional headroom, very low distortion, excellent crosstalk isolation, wide flat frequency response and extremely low noise with very high common-mode signal rejection. It provides exceptional audio performance for the most critical applications in a professional audio environment.
The RU-ASX4D operates from 24 Vdc connected through a rear-panel detachable terminal block.
- Local or Remote Controlled Switching
- Multiple Switching Control Points
- 4 Stereo Inputs to 1 Stereo Output
- Line-Level Audio Switching
- Balanced or Unbalanced Inputs and Output
- Gain Trim on Each Source
- Controllable Using Various RDL Remote Controls
- Open-Collector Output for Selected Input
- DescriptionSpecificationsRelated ProductsAccessoriesDiagramsDimensionsDownloadsRemote ControlsHow to Buy
- Audio Inputs (4):Stereo, Line level on Detachable Terminal Block
- Input Impedance:> 20 k ohms balanced, >10 k ohms unbalanced
- Input Level (for +4 dBu output):-15 dBV to +8 dBu, adjustable on rear-panel trimmers
- Maximum Input Level:+25 dBu
- Common Mode Rejection:> 60 dB (50 Hz to 120 Hz)
- Headroom (above +4 dBu):> 20 dB (unity gain)
- Frequency Response:10 Hz to 20 kHz (+/-0.2 dB)
- Distortion (THD + N):< 0.01% (20 Hz to 20 kHz)
- Noise (below +4 dBu):< -85 dB (with any input selected); < -95 dB (with no input selected)
- Off Attenuation:> 85 dB (1 kHz), > 70 dB (20 kHz)
- Crosstalk:< -85 dB (1 kHz); < -65 dB (20 kHz)
- Front-Panel Switches:Momentary pushbuttons (4, 1 per input), LOCAL/REMOTE latching pushbutton
- Front-Panel Indicators (11):Power, Selected channel (4), LOCAL/REMOTE selector (2), L and R Dual-LED VU meters (4)
- Audio Output:Stereo, Line level on Detachable Terminal Block
- Output Impedance:150 ohms balanced, 75 ohms unbalanced
- Output Level:+4 dBu balanced, unbalanced output 6 dB below balanced output level
- Control inputs (5):1 mA, pulled to ground (4, source selection); 1 mA, pulled to +15 Vdc (SEL)
- Control outputs (5):25 mA, open-collector to ground
- Rear-Panel Indicators (4):L and R Dual-LED VU meters
- RDL Remote Control Compatibility:D-RC4M, D-RCS4
- Power Connection:Detachable Terminal Block
- Power Requirement:24 Vdc @ 150 mA, Ground-referenced
- Ambient Operating Environment:0° C to 55° C
