{"product_id":"rdl-ru-sm16d","title":"RDL RU-SM16D – 4-Channel LED Audio Level Meter","description":"\u003ch2\u003eWhat is the RDL RU-SM16D?\u003c\/h2\u003e\u003cp\u003eThe RDL RU-SM16D is a four-channel audio level meter with a 16-LED display string on each channel. Each input can be calibrated for consumer or professional line level, 8 Ohm speaker lines or 25 V, 70 V and 100 V constant-voltage lines. Meters can run as four mono meters or two stereo pairs, with peak or average response selectable per channel. It adds precise visual level monitoring to equipment racks in commercial sound and paging 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-sm16d.jpg\" alt=\"RDL RU-SM16D 4-Channel LED Audio Level Meter\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eThe RU-SM16D has four separate inputs on detachable terminal blocks, each with an input impedance above 40 kΩ balanced or unbalanced. A rear-panel switch selects fixed or variable calibration for 25 V, 70 V, 100 V and +4 dBu sources. In the variable position, front-panel multi-turn trimmers set the calibrated meter level for each channel. Rear-panel switches set each meter for peak or average display, and the upper three LEDs (+10, +14, +18) always operate in peak-hold mode. In mono systems, one source can feed two meters with one set to peak and the other to average. In stereo systems, each channel, left and right, can display both peak and average values. Bright LEDs provide good visibility, and each input has a label area to identify the source being metered. Power is 24 Vdc at 450 mA, ground-referenced; RDL recommends the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e supply. Rack-mount it with the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-hra1\"\u003eRU-HRA1\u003c\/a\u003e or \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-rc-1ur\"\u003eRC-1UR\u003c\/a\u003e, and see the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ru-sm16a\"\u003eRDL RU-SM16A\u003c\/a\u003e for a two-channel meter.\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour metering channels\u003c\/strong\u003e — Monitors four mono sources or two stereo pairs on 16-LED displays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine, speaker or constant-voltage input\u003c\/strong\u003e — Calibrates for +4 dBu line, 4 or 8 Ohm speaker lines and 25, 70 or 100 V lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed or variable calibration\u003c\/strong\u003e — Switch-selectable fixed calibration or front-panel multi-turn trimmer adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak or average per channel\u003c\/strong\u003e — Each meter is individually switchable between peak and average response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak-hold indicators\u003c\/strong\u003e — The +10, +14 and +18 LEDs hold peaks for clear overload warning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLabeled inputs\u003c\/strong\u003e — A label area on each channel identifies the source being metered.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is it typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAuditorium\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eBroadcast studio\u003c\/li\u003e\n\u003cli\u003eGovernment space\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\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRU-SM16D\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 (4)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eLine level or amplified speaker level, 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\u003eInput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e\u0026gt; 40 kΩ balanced or 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\u003e0 dB calibration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eFixed or variable (switch-selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eFixed input level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e+4 dBu; 25 V; 70 V; 100 V (constant-voltage or 4\/8 Ω amplifier 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\u003eVariable input range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e-24 dBu to +12 dBu; 2 V to 90 V (25 V); 4 V to 90 V (70 V); 5 V to 100 V (100 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMetering frequency response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e20 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\u003eIndicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e16 LEDs per channel: SIG, -20 to +18 (+10, +14, +18 peak hold only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eMetering response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003ePeak or average per channel (switch-selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003ePeak mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRise 50 µs (10–90%), 60 µs (0–100%); fall 65 ms (90–10%), 100 ms (100–0%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eAverage mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eRise 130 ms (10–90%), 300 ms (0–100%); fall 185 ms (90–10%), 300 ms (100–0%), VU characteristic\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 @ 450 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\"\u003e0° 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\"\u003e1.325 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003eTAA compliant (per RDL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px;vertical-align:top\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px\"\u003e7-year RDL warranty\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 it meter 70 V speaker lines?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Each input can be calibrated for 25 V, 70 V or 100 V constant-voltage lines, as well as 4 or 8 Ohm amplifier outputs.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan it show peak and average at the same time?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eEach meter is set to peak or average. In stereo or mono systems, feed a source to two meters and set one to each mode.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat do the top three LEDs do?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe +10, +14 and +18 LEDs operate as peak-hold indicators in both modes.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow is calibration set?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eA rear-panel switch selects fixed calibration or variable calibration using front-panel multi-turn trimmers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat power is required?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e24 Vdc at 450 mA, ground-referenced. RDL recommends the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-ps-24ax\"\u003ePS-24AX\u003c\/a\u003e.\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\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan Creation Networks help commission the system?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Creation Networks designs, programs and commissions commercial AV systems nationwide. Call (888) 230-3661 for help with system design, quoting or installation.\u003c\/p\u003e\u003c\/details\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":68025792889068,"sku":"RU-SM16D","price":657.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/ru-sm16d.jpg?v=1793583895","url":"https:\/\/creationnetworks.net\/products\/rdl-ru-sm16d","provider":"Creation Networks","version":"1.0","type":"link"}