{"product_id":"rdl-ru-asx4dr","title":"RDL RU-ASX4DR","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe RU-ASX4DR is a four channel stereo audio selector with input gain adjustments and output level metering. The module is equipped with an internal stereo VCA for setting the output level. Source selection and level adjustment are by remote control. Each module may be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment. The inputs and output are connected on rear-panel detachable terminal blocks.\u003c\/p\u003e\u003cp\u003eEach 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.\u003c\/p\u003e\u003cp\u003eThe RU-ASX4DR was designed for absolute silent switching of audio signals using only solid-state switching circuitry. Each of the VU-meters, left and right, is calibrated to read +4 dBu feeding the corresponding balanced output.\u003c\/p\u003e\u003cp\u003eThe audio output level is controlled by a remote 10 k? linear taper pot or by 0 to 10 Vdc. A single remote control location is possible using a remote 10 k? potentiometer. The RU-ASX4DR is compatible with RDL D SERIES-RLC10 rotary remote controls that provide user adjustment at single or multiple locations. Audio levels are controlled in 0.5 dB steps using noiseless zero-crossing digital attenuators for optimum reliability, precise tracking and long-term click-free service. The output is stereo line level. Each output channel may be connected balanced or unbalanced.\u003c\/p\u003e\u003cp\u003eInputs 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-ASX4DR may be remote controlled from a single or from multiple locations. When a source is selected, the RU-ASX4DR provides a 25 mA open-collector output to control other equipment or modules. A front-panel LED indicates the selected source. Only one source may be selected at a time. If the momentary input terminal for a selected source is triggered again, all inputs are turned off. \u003c\/p\u003e\u003cp\u003eRear-panel DIP switches are provided to set the VCA activity LEDs for momentary or continuous display, 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.\u003c\/p\u003e\u003cp\u003eThe RU-ASX4DR 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.\u003c\/p\u003e\u003cp\u003eThe RU-ASX4DR operates from 24 Vdc connected through a rear-panel detachable terminal block.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRemote Controlled Switching and Level Control\u003c\/li\u003e\n\u003cli\u003eMultiple Remote Control Locations Possible\u003c\/li\u003e\n\u003cli\u003e4 Stereo Inputs to 1 Stereo Output\u003c\/li\u003e\n\u003cli\u003eLine-Level Audio Switching\u003c\/li\u003e\n\u003cli\u003eExternal Level Control Using 10 kΩ Potentiometer or 0 to 10 Vdc\u003c\/li\u003e\n\u003cli\u003e96 dB Attenuation Range in 0.5 dB Steps\u003c\/li\u003e\n\u003cli\u003eNoiseless Zero-Crossing Adjustment Steps\u003c\/li\u003e\n\u003cli\u003ePrecise Level Tracking on Each Channel\u003c\/li\u003e\n\u003cli\u003eBalanced or Unbalanced Inputs and Output\u003c\/li\u003e\n\u003cli\u003eGain Trim on Each Source\u003c\/li\u003e\n\u003cli\u003eControllable Using Various RDL Remote Controls\u003c\/li\u003e\n\u003cli\u003eOpen-Collector Output for Selected Input\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable class=\"table1\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio Inputs (4)\u003c\/td\u003e\n\u003ctd\u003eStereo, Line level on Detachable Terminal Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 20 k? balanced, \u0026gt; 10 k? unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Level (for +4 dBu output)\u003c\/td\u003e\n\u003ctd\u003e-15 dBV to +8 dBu, adjustable on rear-panel trimmers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Input Level\u003c\/td\u003e\n\u003ctd\u003e+25 dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Mode Rejection\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 60 dB (50 Hz to 120 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeadroom (above +4 dBu)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 18 dB (unity gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e10 Hz to 20 kHz (±0.2 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistortion (THD + N)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.01% (20 Hz to 20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise (below +4 dBu)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; -85 dB (with any input selected); \u0026lt; -95 dB (with no input selected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff Attenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 85 dB (1 kHz), \u0026gt; 70 dB (20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrosstalk\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; -80 dB (1 kHz); \u0026lt; -60 dB (20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront-Panel Indicators (11)\u003c\/td\u003e\n\u003ctd\u003ePower, Selected channel (4), VCA activity up\/down (2), L and R Dual-LED VU meters (4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio Output\u003c\/td\u003e\n\u003ctd\u003eStereo, Line level on Detachable Terminal Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e150 ? balanced, 75 ? unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Level\u003c\/td\u003e\n\u003ctd\u003e+4 dBu balanced, unbalanced output 6 dB below balanced output level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl inputs (6)\u003c\/td\u003e\n\u003ctd\u003e1 mA, pulled to ground (4, source selection); 1 mA, pulled to +15 Vdc (SEL); 0 to 10 Vdc (VCA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl outputs (5)\u003c\/td\u003e\n\u003ctd\u003e25 mA, open-collector to ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCA Control Input\u003c\/td\u003e\n\u003ctd\u003e0 to 10 Vdc; or 0 to 10 k? linear potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-Panel Indicators (4)\u003c\/td\u003e\n\u003ctd\u003eL and R Dual-LED VU meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRDL Remote Control Compatibility\u003c\/td\u003e\n\u003ctd\u003eD-RC4M, D-RCS4 (source selection); D-RLC10, D-RLC10M, D-RLC10K, D-RLC10KM, D-RLC3 (VCA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Connection\u003c\/td\u003e\n\u003ctd\u003eDetachable Terminal Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e24 Vdc @ 175 mA, Ground-referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Operating Environment\u003c\/td\u003e\n\u003ctd\u003e0° C to 55° C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEEE Weight\u003c\/td\u003e\n\u003ctd\u003e1.22 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e1.53 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":43895095492651,"sku":"RDL-RU-ASX4DR","price":577.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/rdl-ru-asx4dr-2__30064.1682436035.1280.1280.jpg?v=1775683981","url":"https:\/\/www.empirepro.com\/products\/rdl-ru-asx4dr","provider":"Empire Pro","version":"1.0","type":"link"}