The HD-PA35UA is a single input audio amplifier for systems demanding the highest energy efficiency. It may be used as a single zone amplifier fed from a variety of RDL or OEM mixers. It is ideal for providing one or more additional zones to a mix originating from another RDL HD series mixer amplifier. The 35 watt power amplifier output is driven from a high-efficiency Class D amplifier stage. The amplifier normally shuts down (standby sleep mode) when audio is absent and automatically turns on when needed. The amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10k ohm controls. The amplifier provides a constant voltage output (25 V, 70 V or 100 V).The HD-PA35UA is engineered, tested and manufactured in the U.S.A. to strict energy conservation standards. The unit consumes less than 1 watt of mains power in standby mode, and meets power amplifier efficiency specifications with an analog-filtered Class-D digital output stage.The HD-PA35UA provides a front-panel control to set the input gain. An optional remote control connected to the rear-panel RJ45 jack provides for remote adjustment of the output level. The tone controls adjust the equalization at the amplifier output.Main Features:One input with front-panel volume controlBass and Treble tone controlsDesigned as a single zone amplifierMaster volume VCA controlled with remote adjustment capabilityAmplifier output on detachable terminal blockUnbalanced summing inputs on RCA jacksIncludes power supplyAutomatic sleep mode meets strictest energy saving standardsSpecifications:Rated Power: 35 W RMSAudio Input: Unbalanced stereo summing input on RCA jacksMaximum Input Level: + 5 dBV (+11 dBV, one input); (for 1% THD+N at output)Input level: -15 dBV (180 mV), (to cross compressor threshold equaling 23 W amplified output, both input jacks driven)Noise: <-75 dB (max gain)THD+N: < 0.5% (1 kHz at compressor threshold)Compressor: Threshold 2 dB below rated output, automatically adjusting attack and release timesFrequency Response: 3 dB (50 Hz to 18 kHz)Tone Controls: 10 dB @ 10 kHz, 9 dB @ 100 Hz (front-panel) with center detentPower Amplifier Output: 35 W RMS (25, 70 or 100 V); <1% THD+NIndicators (3): Front-panel: Signal present (green), Compressor activity (red), Power (bright=on, dim=standby, blue)VCA: Output level, 0 to 10 Vdc control, RJ45 (compatible with RDL VCA wall controls)Front-panel controls (4): Input, EQ (2, bass and treble), Power (momentary pushbutton, toggle on/standby)Rear-panel controls (4): Sleep (standby) mode delay (4 binary switches)Efficiency Standard Used: Energy Star Program Requirements for Audio/Video Version 2.0Sleep Mode Power Consumption: < 1 W (amplifier and included power supply)Sleep Mode Delay: 10 minutes to 2 hours (switch-selectable in 10 minute increments)Sleep Mode Disable: SelectableActive Mode Delay: 2 seconds (nominal) after input audio detectedAudio Detector Threshold: -42 dBVAmbient Operating Environment: 0 C to 50 C Maximum; 20 C RecommendedPower Supply (included): 100 to 240 Vac, 50-60 Hz, 50 W; 24 Vdc output to amplifier chassisDimensions and Weight: Height: 3.5 in.(8.89 cm); Width: 8.5 in.(21.6 cm); Depth: 10 in.(25.4 cm); Weight: 7.3 lb. (3.3 kg)Package Type: Cardboard BoxPackage Dimensions: 17.75 x 9.125 x 3.9375 in.Shipping Weight: 9.33 lbs.WEEE weight: 7.34 lbs.Tariff code: 8518.50.0000