{"product_id":"rdl-sf-pa50a","title":"RDL SF-PA50A","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe SF-PA50A is a 50 Watt audio power amplifier that converts one analog input to a 70 V or 100 V constant voltage amplified output.\u003c\/p\u003e\u003cp\u003eAn analog audio source may be connected to either the mono balanced terminal block input or to the unbalanced Mini-Jack which sums the left and right channels to mono. Amplifier gain is set by the installer using a rear-panel single-turn potentiometer with an associated dual-LED VU meter calibrated to 20 dB below maximum power output.\u003c\/p\u003e\u003cp\u003eThe SF-PA50A is equipped with an internal VCA for setting the amplifier output level. A detachable terminal block provides for the connection of an external 10 k? potentiometer or a 0 to 10 Vdc control voltage. RDL remote controls are available to provide single-turn, multi-turn (rotary encoder) or pushbutton (ramp or fixed level selection) user level control. VCA control insures long term noise-free level adjustment.\u003c\/p\u003e\u003cp\u003eThe module is equipped with both thermal and output short-circuit protection. The high-efficiency Class D output stage produces minimal heat for all levels of expected voice or music modulation. Upon power-up and during overloads or overheating, an LED MUTE indicator glows yellow and the output is muted.\u003c\/p\u003e\u003cp\u003eThe SF-PA50A is equipped to operate from an included external 24 Vdc power supply. The SF-PA50A monitors the amplifier power and limits the current to protect the power supply from shutting down even during extreme feedback or square wave modulation conditions. A red rear-panel OVERLOAD PROTECT LED flashes when the SF-PA50A reduces power consumption to prevent shutdown of the power supply.\u003c\/p\u003e\u003cp\u003eThe SF-PA50A is constructed in a durable, professional all-metal enclosure suitable for free-standing, surface-mounted or rack-mounted operation. This full-featured SYSFLEX product is engineered and manufactured in the U.S.A for continuous duty in demanding installations. The versatility of SYSFLEX products adds enormous flexibility in the design and installation of professional A\/V systems.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e50 Watts RMS Constant Voltage Amplifier\u003c\/li\u003e\n\u003cli\u003e70 V or 100 V Output\u003c\/li\u003e\n\u003cli\u003ePlenum Rated per UL 2043 Standard\u003c\/li\u003e\n\u003cli\u003eAnalog Balanced Mono Input or Unbalanced Stereo Mini-Jack Input\u003c\/li\u003e\n\u003cli\u003eAdjustable Gain with Dual-LED VU Metering\u003c\/li\u003e\n\u003cli\u003eAutomatically Limits Supply Current to Protect Against Power Supply Shutdown\u003c\/li\u003e\n\u003cli\u003eVCA Control on Detachable Terminal Block\u003c\/li\u003e\n\u003cli\u003eExternal Control Using 10 k? Potentiometer or 0 to 10 Vdc\u003c\/li\u003e\n\u003cli\u003eCompatible with RDL Remote Level Controls\u003c\/li\u003e\n\u003cli\u003eLED Indicators: Power, Amplifier Mute, Analog Input Level\u003c\/li\u003e\n\u003cli\u003eHigh-Efficiency Class D Operation\u003c\/li\u003e\n\u003cli\u003eThermal and Short-Circuit Protection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable class=\"table1\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Connectors (2)\u003c\/td\u003e\n\u003ctd\u003eBalanced terminal block or stereo unbalanced Mini-Jack (L and R inputs summed to mono)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBalanced Input Level\u003c\/td\u003e\n\u003ctd\u003e+4 dBu nominal, adjustable; -10 dBu minimum (for 20 dB below full output power); +25 dBu maximum (before clipping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnbalanced Input Level\u003c\/td\u003e\n\u003ctd\u003e-10 dBV nominal, adjustable; -25 dBV minimum (for 20 dB below full output power); +10 dBV maximum (before clipping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain Adjustment\u003c\/td\u003e\n\u003ctd\u003eSingle turn audio taper (with associated Dual-LED VU Meter calibrated to 20 dB below full output power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;10 k? balanced, \u0026gt;5 k? unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon mode rejection\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 60 dB (balanced, 50 Hz to 120 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Amplifier Output\u003c\/td\u003e\n\u003ctd\u003e50 W RMS (70 or 100 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e+0\/-3 dB (50 Hz to 20 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD+N\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 1% (1 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;-90 dB (below max power); \u0026lt;-80 dB (below 1\/8 power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators (5)\u003c\/td\u003e\n\u003ctd\u003eFront-panel: Power (blue), Amplifier muted (yel), Rear-panel: Overload Protect (red), dual-LED VU meter (2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCA\u003c\/td\u003e\n\u003ctd\u003e0 to 10 Vdc control, detachable terminal block (compatible with RDL VCA wall controls)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Operating Environment\u003c\/td\u003e\n\u003ctd\u003e0° C to 40° C Maximum; 20° C Recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e24 Vdc @ 2700 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply (included)\u003c\/td\u003e\n\u003ctd\u003e100 to 240 Vac, 50-60 Hz, IEC C14; Output to module: 24 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlenum Rating Standard\u003c\/td\u003e\n\u003ctd\u003eUL 2043\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eHeight: 1.7 in. (4,32 cm); Width: 5.83 in. (14,8 cm); Depth: 6.45 in. (16.38 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Type\u003c\/td\u003e\n\u003ctd\u003eCardboard Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd\u003e10 x 7 x 2.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e4.22 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEEE weight\u003c\/td\u003e\n\u003ctd\u003e3.82 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff code\u003c\/td\u003e\n\u003ctd\u003e8518.50.0000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"RDL","offers":[{"title":"Default Title","offer_id":43895100047403,"sku":"RDL-SF-PA50A","price":374.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/rdl-sf-pa50a-2__41650.1682443519.1280.1280.jpg?v=1775684007","url":"https:\/\/www.empirepro.com\/products\/rdl-sf-pa50a","provider":"Empire Pro","version":"1.0","type":"link"}