{"product_id":"rdl-ru-asx4d","title":"RDL RU-ASX4D – 4x1 Stereo Balanced Audio Switcher, Terminal Block","description":"\u003ch2\u003eWhat is the RDL RU-ASX4D?\u003c\/h2\u003e\u003cp\u003eThe RDL RU-ASX4D is a four-input, one-output stereo line-level audio selector with silent solid-state switching. It accepts balanced or unbalanced sources on detachable terminal blocks, with gain trim on each input and dual-LED VU metering on the output. Sources can be selected from the front panel or from one or more RDL remote controls.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/ru-asx4d.jpg\" alt=\"RDL RU-ASX4D 4x1 Stereo Balanced Audio Switcher, Terminal Block\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eEach of the four stereo inputs has a rear-panel gain trimmer that sets input levels between -15 dBV and +8 dBu to the proper operating level, with a maximum input of +25 dBu. Switching uses only solid-state circuitry for silent transitions between sources. In LOCAL mode, four front-panel pushbuttons select one input at a time, and pressing the active button again turns all inputs off. In REMOTE mode, inputs are selected by a sequential remote such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rcs4\"\u003eRDL D-RCS4\u003c\/a\u003e, a momentary remote such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rc4m\"\u003eRDL D-RC4M\u003c\/a\u003e, or an external open-collector closure to ground. The RU-ASX4D can be controlled from a single location or several, and it provides a 25 mA open-collector output for the selected source to control other equipment. Rear-panel DIP switches set remote mode, permanently enable the remote terminals and choose whether power-up returns to a preset source or the last source used. The stereo output can be wired balanced or unbalanced, and two dual-LED VU meters, front and rear, are calibrated to +4 dBu. It operates from 24 Vdc at 150 mA through a detachable terminal block; RDL recommends the PS-24AS (USA) or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e (international) power supply, not included. Mount it with the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-rc-1ur\"\u003eRC-1UR 1RU rack chassis\u003c\/a\u003e, \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-hra1\"\u003eRU-HRA1 10.4-inch rack mount\u003c\/a\u003e or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-sma1\"\u003eRU-SMA1 surface mounting plate\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour stereo inputs to one output\u003c\/strong\u003e — Line-level sources are selected one at a time to a stereo output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilent solid-state switching\u003c\/strong\u003e — Switching uses only solid-state circuitry to avoid audible clicks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocal or remote control\u003c\/strong\u003e — Select sources from the front panel or from RDL D-RCS4 and D-RC4M remotes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput gain trim\u003c\/strong\u003e — Each input has a trimmer for levels from -15 dBV to +8 dBu.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus output\u003c\/strong\u003e — A 25 mA open-collector output for the selected source can control other equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower-up recall\u003c\/strong\u003e — DIP switches select a preset source or the last source used at power-up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is it typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConference room\u003c\/li\u003e\n\u003cli\u003eBoardroom\u003c\/li\u003e\n\u003cli\u003eTraining room\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch\"\u003e\u003ctable style=\"border-collapse:collapse;width:100%;min-width:300px;table-layout:fixed\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:44%\"\u003e\n\u003ccol style=\"width:56%\"\u003e\n\u003c\/colgroup\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eAudio inputs (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eStereo line level, detachable terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eInput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 20 kΩ balanced; \u0026gt; 10 kΩ unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eInput level (for +4 dBu out)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-15 dBV to +8 dBu, rear-panel trimmers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMaximum input level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+25 dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eCommon mode rejection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 60 dB (50 Hz to 120 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eHeadroom\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 20 dB above +4 dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eFrequency response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e10 Hz to 20 kHz (±0.2 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOff attenuation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 85 dB (1 kHz); \u0026gt; 70 dB (20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eAudio output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eStereo line level, detachable terminal block; +4 dBu balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOutput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e150 Ω balanced; 75 Ω unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eControl inputs (5)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e4 source selection (pulled to ground); 1 SEL (pulled to +15 Vdc)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eControl outputs (5)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e25 mA open-collector to ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eRemote compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRDL D-RC4M, D-RCS4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003ePower requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e24 Vdc @ 150 mA, ground-referenced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eOperating environment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e32°F to 131°F (0°C to 55°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eShipping weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e1.515 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan the RU-ASX4D be controlled from a wall plate?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. It works with RDL remotes such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rc4m\"\u003eRDL D-RC4M\u003c\/a\u003e and \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rcs4\"\u003eRDL D-RCS4\u003c\/a\u003e, or with external open-collector closures.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan I use balanced and unbalanced sources together?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Each input and the output can be connected balanced or unbalanced.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWill switching cause pops?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eRDL designed the RU-ASX4D for silent switching using only solid-state circuitry.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan it trigger other equipment when a source is selected?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. It provides a 25 mA open-collector output for the selected input.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat happens after a power failure?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eRear-panel DIP switches set power-up to return to a pre-programmed source or the last source used.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eIs a power supply included?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eNo. It needs 24 Vdc at 150 mA; RDL recommends the PS-24AS (USA) or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e (international) power supply, not included.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat warranty applies?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 7-year RDL warranty. For warranty claims, RMAs or support, contact Creation Networks at (888) 230-3661 or sales@creationnetworks.net.\u003c\/p\u003e\u003c\/details\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025739804908,"sku":"RU-ASX4D","price":421.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/ru-asx4d.jpg?v=1793583007","url":"https:\/\/creationnetworks.net\/products\/rdl-ru-asx4d","provider":"Creation Networks","version":"1.0","type":"link"}