{"product_id":"rdl-sf-ma100a","title":"RDL SF-MA100A – Format-A 100 W 70V\/100V Mixer Amplifier","description":"\u003ch2\u003eWhat is the RDL SF-MA100A?\u003c\/h2\u003e\u003cp\u003eThe RDL SF-MA100A is a 100 W RMS 70 V or 100 V mixer amplifier that mixes three audio channels received on an RDL Format-A RJ45 connector. Three operating modes cover local mixing, remote master level control and remote control of each mixer input through RDL wall controls. A high-efficiency Class D output, built-in compressor, UL 2043 plenum rating and included 48 Vdc supply make it a compact constant-voltage mixer amplifier for commercial paging and background music.\u003c\/p\u003e\u003ch2\u003eHow does it work?\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/rdlnet.com\/wp-content\/uploads\/2024\/08\/SF-MA100A-1024x629.png\" alt=\"RDL SF-MA100A Format-A 100 W 70V\/100V mixer amplifier\" style=\"max-width:100%;height:auto\" loading=\"lazy\"\u003e\u003c\/p\u003e\u003cp\u003eFormat-A pairs A, B and C arrive on one RJ45 jack and are mixed by three rear-panel potentiometers or, in remote modes, by an RDL wall control. At the normal gain setting the amplifier delivers 100 W into a 70 V or 100 V constant-voltage line for a +22 dBu input. All three Format-A pairs, plus power, pass through to a LOOP OUT jack to feed additional amplifiers or Format-A receivers. Input gain is set with single-turn rear-panel pots and a dual-LED VU meter calibrated to 10 dB below maximum output. Mode 2 uses a \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rlc10km\"\u003eRDL D-RLC10KM remote level control\u003c\/a\u003e for master level, and Mode 3 uses a \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-rc3\"\u003eD-RC3 remote mixing control\u003c\/a\u003e to adjust each input, with the rear pots setting the maximum gain; external 10 kΩ pots or 0 to 10 Vdc control voltages also work. Internal VCAs keep remote level adjustment noise-free over the long term. A selectable, aurally transparent compressor adds up to 15 dB of headroom at the amplifier input, and thermal and short-circuit protection guard the output stage. The SF-MA100A operates from an included external 48 Vdc power supply (100 to 240 Vac) in an all-metal SysFlex enclosure for free-standing, surface or rack mounting. Format-A senders such as the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-d-tps2am\"\u003eRDL D-TPS2AM\u003c\/a\u003e feed it, and the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-sf-pa100a\"\u003eSF-PA100A\u003c\/a\u003e and \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-sf-np100a\"\u003eSF-NP100A\u003c\/a\u003e amplifiers extend the same system; SysFlex mounting options include the \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-sf-ra1\"\u003eSF-RA1 rack adapter\u003c\/a\u003e and \u003ca href=\"https:\/\/creationnetworks.net\/products\/rdl-sf-ucb2\"\u003eSF-UCB2 under-counter brackets\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eWhat are the key features?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 W constant-voltage output\u003c\/strong\u003e — Delivers 100 W RMS on 70 V or 100 V speaker lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-input Format-A mixer\u003c\/strong\u003e — Mixes Format-A pairs A, B and C from one RJ45 connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree operating modes\u003c\/strong\u003e — Local mixing, remote master level, or remote control of each input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote wall control\u003c\/strong\u003e — Works with RDL D-RLC10KM and D-RC3 style controls over RJ45.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat-A loop-through\u003c\/strong\u003e — Signal and power pairs pass to a LOOP OUT jack for more amplifiers or receivers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in compressor\u003c\/strong\u003e — Selectable compressor adds up to 15 dB of headroom.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D efficiency\u003c\/strong\u003e — Produces minimal heat at all expected program levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection\u003c\/strong\u003e — Thermal and output short-circuit protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlenum rated\u003c\/strong\u003e — Rated per UL 2043 for installation in air-handling spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply included\u003c\/strong\u003e — Ships with an external 48 Vdc supply.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhere is it typically used?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMulti-purpose room\u003c\/li\u003e\n\u003cli\u003eCommercial meeting space\u003c\/li\u003e\n\u003cli\u003eTraining room\u003c\/li\u003e\n\u003cli\u003eHouse of worship\u003c\/li\u003e\n\u003cli\u003eGovernment space\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv style=\"overflow-x:auto;-webkit-overflow-scrolling:touch\"\u003e\u003ctable border=\"1\" cellpadding=\"6\" style=\"border-collapse:collapse;border-color:#ddd;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 valign=\"top\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSF-MA100A (SysFlex series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003eInput: RDL TP Format-A\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eInput Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRJ45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eFormat-A Signal Pairs Used (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA, B, C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003eFormat-A Output: RJ45 (loop-through)\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eCMRR\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 80 dB (50 Hz to 150 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eHeadroom above +4 dBu input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 18 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003ePower amplifier\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003ePower Amplifier Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 W RMS (70 or 100 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+0\/-3 dB (50 Hz to 20 kHz; -0.25 dB typical at 20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eTHD+N\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1% (100 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eNoise\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;-85 dB (below max power); \u0026lt;-75 dB (below 1\/8 power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eAudio Metering\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual-LED VU Meter calibrated to 10 dB below full output power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eCompressor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSelectable (IN\/OUT), threshold 2 dB below rated output, automatic adjusting attack and release times; adds 15 dB headroom to power amplifier input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003eMode 1\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInputs summed using Gain Adjustments; No remote controls used\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eInputs (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePair A, Pair B, Pair C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eGain Adjustments (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle turn audio taper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003eMode 2\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInputs summed using Gain Adjustments; Master VCA level remote control (see RDL D*-RLC10M type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eInputs (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePair A, Pair B, Pair C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eGain Adjustments (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle turn audio taper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eVCA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRJ45, 0 to 10 Vdc control (compatible with RDL D*-RLC10KM wall controls)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#f5f5f5\"\u003e\u003cstrong\u003eMode 3\u003c\/strong\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInputs summed using remote control (see RDL D*-RC3 type remote)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eInputs (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePair A, Pair B, Pair C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eGain Adjustments (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle turn audio taper; sets maximum gain available for associated input pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eVCA (3)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRJ45, 0 to 10 Vdc control (compatible with RDL D*-RC3 wall controls)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eIndicators (5)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFront-panel: Ready (green), Overload Shutdown (red), Rear-panel: dual-LED VU meter (2), Format-A Power (green)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eAmbient Operating Environment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32° F to 122° F (0° C to 50° C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003ePower Supply (included)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 to 240 Vac, 50-60 Hz, IEC C14; Output to module: 48 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003ePlenum Rating Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL 2043\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeight: 1.68 in. (4.27 cm); Width: 8.71 in. (22.12 cm); Depth: 7.8 in. (19.81 cm)\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\u003eWhat speaker lines does it drive?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e70 V or 100 V constant-voltage lines at up to 100 W RMS.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat are the three modes?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eMode 1 mixes the three inputs with rear-panel pots. Mode 2 adds remote master level control via a D-RLC10KM-type control. Mode 3 lets a D-RC3-type remote adjust each input, with the rear pots setting maximum gain.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat feeds the inputs?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eRDL Format-A senders on a single RJ45 connection carrying pairs A, B and C.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eIs a power supply included?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. An external 48 Vdc supply (100 to 240 Vac, IEC C14) is included.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan it go above a drop ceiling?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eIt is plenum rated per UL 2043. Confirm local code requirements with your installer.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eCan I chain more amplifiers?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. The Format-A LOOP OUT jack passes the signal and power pairs to additional amplifiers or Format-A receivers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat warranty does it carry?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eRDL's product page does not list warranty terms for this model. Contact Creation Networks at (888) 230-3661 for current warranty and support details before you order.\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 70 V paging and background music 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":68025793609964,"sku":"SF-MA100A","price":821.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/7982\/4364\/files\/SF-MA100A.png?v=1793583898","url":"https:\/\/creationnetworks.net\/products\/rdl-sf-ma100a","provider":"Creation Networks","version":"1.0","type":"link"}