{"product_id":"rdl-ru-mx4lt","title":"RDL RU-MX4LT – 4-Input Line Mixer with Transformer Output","description":"\u003ch2\u003eWhat is the RDL RU-MX4LT?\u003c\/h2\u003e\u003cp\u003eThe RDL RU-MX4LT is a four-channel line-level audio mixer that combines balanced XLR and unbalanced phono sources into one balanced output. This version adds a factory-installed output isolation transformer on the balanced output. Per-channel VU meters and an LED string mix meter make level setting fast in rack-mounted AV systems.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/ru-mx4lt.jpg\" alt=\"RDL RU-MX4LT 4-Input Line Mixer with Transformer Output\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eEach of the four inputs accepts either a balanced XLR line-level source or an unbalanced phono jack source. Balanced inputs are 20 kΩ bridging with an input range of -13 to +22 dBu, while unbalanced inputs accept -25 dBV to +20 dBV for +4 dBu output. Front-panel controls set each channel level, with up to 17 dB of gain on balanced inputs and 27 dB on unbalanced inputs, plus an output attenuator. Every input has a dual-LED VU meter that follows standard VU ballistics, and the final mix is shown on an LED string meter with an arc motion. The balanced 150 Ω output runs at +4 dBu and switches to mic level (-45 dBu) when needed, and an unbalanced -10 dBV LINE OUTPUT is also provided. The unbalanced output can feed the DIRECT input of another RU-MX4L or an RU-MX4 to expand the number of channels. The RU-MX4LT includes a factory-installed output isolation transformer. Frequency response is 20 Hz to 30 kHz (±0.25 dB), and the module runs from ground-referenced 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. 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 line-level inputs\u003c\/strong\u003e — Each channel accepts a balanced XLR or unbalanced phono source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMic or line balanced output\u003c\/strong\u003e — The XLR output switches between +4 dBu line and -45 dBu mic level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion bussing\u003c\/strong\u003e — The unbalanced output feeds the DIRECT input of another mixer to add channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePer-input VU meters\u003c\/strong\u003e — Dual-LED meters on each input follow standard VU ballistics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED mix meter\u003c\/strong\u003e — An LED string meter shows the final mix level at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput isolation transformer\u003c\/strong\u003e — A factory-installed transformer isolates the balanced output.\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\u003eBalanced line inputs (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e20 kΩ balanced bridging, XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eBalanced input level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-13 to +22 dBu for +4 dBu output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eUnbalanced line inputs (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e2 kΩ unbalanced, phono jack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eUnbalanced input level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-25 dBV to +20 dBV for +4 dBu output; -10 dBV nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eGain adjustments (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eBalanced: off to 17 dB; unbalanced: off to 27 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\u003eOutput attenuator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e0 dB to infinity\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\"\u003e20 Hz to 30 kHz (±0.25 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\u003eOutputs (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+4 dBu 150 Ω balanced (switchable to mic level -45 dBu); -10 dBV 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\u003eOutput transformer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eFactory installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eIndicators (17)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eDual-LED VU per input; power LED; LED mix level meter (0 dB = +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\u003ePower requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eGround-referenced 24 Vdc @ 150 mA\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 122°F (0°C to 50°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\"\u003e1.84 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-MX4LT mix microphones?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eNo. It is a line-level mixer. For microphones, use an RDL mic\/line mixer or preamplifier ahead of it.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan the output feed a mic input?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. The balanced output is switchable to mic level (-45 dBu).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow do I add more inputs?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eConnect the unbalanced LINE OUTPUT to the DIRECT input of another RU-MX4L or an RU-MX4.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat is the difference between the RU-MX4L and RU-MX4LT?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe RU-MX4LT adds a factory-installed output isolation transformer; otherwise the two are the same.\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 ground-referenced 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":68025751929068,"sku":"RU-MX4LT","price":449.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/ru-mx4lt.jpg?v=1793583331","url":"https:\/\/creationnetworks.net\/products\/rdl-ru-mx4lt","provider":"Creation Networks","version":"1.0","type":"link"}