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RDL 4x1 Stereo Balanced Audio Switcher - Terminal Block
RU-ASX4D
$850.67
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Diagram | Related Products | Four Frequency Audio Test Tone Selection | Datasheet
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.
Features:
- 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
The RU-ASX4D was designed for absolute silent switching of audio signals using only solid-state switching circuitry.
The output is stereo line level. Each output channel may be connected balanced or unbalanced. Each of the VU-meters, left and right, is calibrated to read +4 dBu for the corresponding balanced output.
A front-panel LOCAL/REMOTE switch enables either the front-panel buttons or the rear-panel remote control terminals provided on detachable terminal blocks. In the LOCAL mode, four keyboard style long-life pushbuttons on the front panel are used to select one input. When a button is pushed, the corresponding audio input is fed to the output and any previously selected source is shut off. Only one source may be selected at a time. If the button for a selected source is pushed again, all inputs are turned off. An LED above each pushbutton indicates the selected source. In the REMOTE mode, inputs are selected by a sequential remote control such as an RDL D-RCS4, by a momentary remote control such as an RDL D-RC4M or by an external open-collector momentary closure to ground. The RU-ASX4D may be remote controlled from a single or from multiple locations. When a source is selected, the RU-ASX4D provides a 25 mA open-collector output to control other equipment or modules.
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.
Specification
Audio Inputs (4):
Stereo, Line level on Detachable Terminal Block
Input Impedance:
> 20 kΩ balanced, >10 kΩ 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 Ω balanced, 75 Ω 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
WEEE Weight:
1.26 lbs
Shipping Weight:
1.515 lbs
Tariff Code:
8543.70.9960
Diagram | Related Products | Four Frequency Audio Test Tone Selection | Datasheet