{"product_id":"rdl-ru-ada4d","title":"RDL RU-ADA4D – Stereo 2x4 \/ Mono 1x8 Audio Distribution Amp","description":"\u003ch2\u003eWhat is the RDL RU-ADA4D?\u003c\/h2\u003e\u003cp\u003eThe RDL RU-ADA4D is a stereo audio distribution amplifier that feeds four stereo outputs, or eight mono outputs when switched to mono mode. Front-panel input and output trimmers plus a dual-LED VU meter for each input make level setting straightforward. Balanced or unbalanced connections on detachable terminal blocks and very low distortion suit demanding professional installations.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/01\/ru-ada4d.jpg\" alt=\"RDL RU-ADA4D audio distribution amplifier\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eThe RU-ADA4D has two line-level inputs that accept balanced or unbalanced signals on rear-panel detachable terminal blocks. Front-panel INPUT GAIN trimmers bring signals between -14 dBV unbalanced and +9 dBu balanced to the proper operating level, shown on dual-LED VU meters. Maximum input level is +25 dBu, which leaves ample headroom at normal operating levels. A rear-panel switch selects stereo or mono; in mono, input A drives all 8 outputs, so only one input needs wiring. Each of the eight outputs has its own front-panel level trimmer and delivers +4 dBu balanced at 150 Ω or -10 dBV unbalanced. THD+N is below 0.0025%, noise is below -92 dB, and CMRR is above 90 dB at 100 Hz. The module runs on 24 Vdc; RDL recommends the PS-24AS (USA) or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e (international) supply. It mounts with RDL RACK-UP accessories such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-hra1\"\u003eRDL RU-HRA1\u003c\/a\u003e or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-rc-1ur\"\u003eRDL RC-1UR rack chassis\u003c\/a\u003e, or on a surface with the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-br1\"\u003eRDL RU-BR1 bracket\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereo or mono distribution\u003c\/strong\u003e — Four stereo outputs or eight mono outputs from one module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput trimmers and metering\u003c\/strong\u003e — Front-panel gain with a dual-LED VU meter for each input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePer-output trim\u003c\/strong\u003e — Eight front-panel output level trimmers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced or unbalanced I\/O\u003c\/strong\u003e — Detachable terminal blocks accept either connection type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion and noise\u003c\/strong\u003e — THD+N below 0.0025% and noise below -92 dB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh headroom\u003c\/strong\u003e — More than 20 dB above +4 dBu with +25 dBu maximum input.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is it typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBroadcast studio\u003c\/li\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eConference room\u003c\/li\u003e\n\u003cli\u003eGovernment space\u003c\/li\u003e\n\u003cli\u003eTraining 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\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRU-ADA4D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eInputs (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eStereo (A\/left and B\/right) on 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\"\u003e20 kΩ balanced or 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\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+4 dBu balanced (nominal), +25 dBu maximum; -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\u003eInput Gain Adjustments (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-5 dB to +15 dB (rel. +4 dBu balanced); -3 dB to +17 dB (rel. -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\u003eInput Metering (2)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eDual-LED VU Meter for Input A and Input B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMono mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRear-panel switch-selectable (input A feeds all 8 outputs)\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 (8)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eStereo, A (4), B (4) on detachable terminal blocks\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\u003eOutput Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+4 dBu balanced (nominal), +24 dBu maximum; -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 Level Adjustments (8)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-9 dB to +6 dB (rel. +4 dBu, balanced); -3 dB to + 12 dBu (rel. -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\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e10 Hz to 165 kHz (+\/- 0.25 dB); 10 Hz to 35 kHz (+\/- 0.01 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\u003eTHD+N\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026lt; 0.0025% (20 Hz to 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\u003eHeadroom\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 20 dB (above +4 dBu input or 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\u003eNoise\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026lt; -92 dB (below +4 dBu output, 20 Hz to 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\u003eCrosstalk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026lt; -90 dB (20 Hz to 5 kHz); \u0026lt;-80 dB (5 kHz to 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\u003eCMRR\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 90 dB (100 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\u003eAmbient Operating 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\u003ePower Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eGROUND REFERENCED, 24 Vdc @ 82 mA (idle, nominal), 120 mA (max.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eCase dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e5.75\" (14.6 cm)W x 1.65\" (4.18 cm)H x 3.54\" (9.0 cm)D; 3.9\" (9.9 cm)D with connectors\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\u003eHow many outputs does it provide?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eFour stereo outputs, or eight mono outputs when the rear-panel switch is set to mono.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan it accept unbalanced sources?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Each input accepts balanced or unbalanced signals, from -14 dBV unbalanced to +9 dBu balanced.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow is it powered?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e24 Vdc, ground-referenced, at 82 mA idle and 120 mA maximum. RDL recommends the PS-24AS (USA) or PS-24AX (international).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan each output be adjusted?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. All eight outputs have front-panel level trimmers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow is it rack mounted?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eIt is a RACK-UP module and mounts with RDL RACK-UP accessories such as the RU-HRA1 or RC-1UR.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat warranty does it carry?\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\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan Creation Networks help design the system?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Our team specifies, programs and installs audio distribution systems for commercial projects nationwide. Call (888) 230-3661 for a quote or design review.\u003c\/p\u003e\u003c\/details\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025740361964,"sku":"RU-ADA4D","price":371.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/ru-ada4d.jpg?v=1793583009","url":"https:\/\/creationnetworks.net\/products\/rdl-ru-ada4d","provider":"Creation Networks","version":"1.0","type":"link"}