User manual QSC AUDIO RMX 4050HD

[. . . ] RMX 4050HD and RMX 5050 User Manual *TD-000109-01* TD-000109-01 rev. F Important Safety Precautions & Explanation of Symbols WARNING! CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this manual. The lightning flashes printed next to the output terminals of the amplifier are intended to alert the user to the risk of hazardous energy. [. . . ] Parallel Mode Switches 4, and 5, are set to the RIGHT position. Switch 6 and 7 are set to the LEFT position. Stereo Mode - Switches 4, 5, 6 and 7 are all set to the LEFT position. Bridge Mode- Switches 4, 5, 6, 7 and 8 are all set to the RIGHT position and Switch 10 is set to the LEFT position. SETTING LOW FREQUENCY FILTERS Each channel has a 12dB per octave Low Frequency Filter to prevent cone overexcursion, making more power available for the loudspeaker's rated frequency range. This reduces distortion and prevents amplifier overload. The Filter should only be turned off for driving subwoofers with special low frequency capability. Otherwise, unless you have filtering in the signal path preceding the amplifier, use the Low Frequency Filter. The loudspeaker's documentation will specify the low frequency limit. Each channel has its own switches for LF Filter on/off and frequency selection. Switches 2 and 9 select 30Hz or 50 Hz. BARRIER STRIP INPUTS Each channel has a balanced 3-terminal input. Wiring is connected with simple hand tools, and inputs can be changed quickly. The input impedance is 20k ohm balanced or 10k ohm unbalanced. Balanced connections are recommended to reduce AC hum and interference, especially with long cable runs. Unbalanced connections may be suitable for short cables. The signal's source impedance should be less than 600 ohms. If unbalanced connections are required, connect a jumper wire between the minus (-) terminal and the ground terminal. Then connect the input signal to the positive (+) terminal and the shield to the minus or ground terminal. Balanced inputs: Strip the wires ¼ inch (6 mm) and connect to the terminals as shown. Be sure to tighten the screws firmly. Unbalanced inputs: Strip the wire ¼ inch and connect a jumper wire between the minus (-) terminal and the ground terminal. Then connect the input signal to the positive (+) terminal and the shield to the minus or ground terminal, as shown. 5 XLR and TRS (1/4") INPUTS Each channel has a balanced 3-terminal XLR and TRS input. Inputs are connected with standard cables and can be changed quickly. Pinouts are marked on the rear panel and shown in the illustration. The input impedance is 20k ohm balanced or 10k ohm unbalanced. Balanced connections are recommended to reduce AC hum and interference, especially with long cable runs. [. . . ] Operation will resume after the amplifier has cooled down sufficiently. If both rear panel circuit breakers are tripped, the Protect indicator will not be illuminated. Gain controls and indicators. 8 SPECIFICATIONS Output Circuit Type Output Power in watts FTC: 20 Hz to 20 kHz, 0. 1% THD 8 ohms both channels driven 4 ohms 2 ohms EIA: 1 kHz, 0. 1% THD both channels driven Bridged Mode at 0. 1% THD 8 ohms 4 ohms 2 ohms, 1% THD 8 ohms, 20 Hz to 20 kHz 8 ohms, 1 kHz 4 ohms, 1 kHz, 1% THD complementary bipolar output with multi-step high efficiency circuit RMX 4050HD 800 1300 1600 850 1400 2000 2600 2800 4000 1. 25 Vrms RMX 5050 1050 1600 2000 1100 1800 2500 3200 3600 5000 1. 42 Vrms Input Sensitivity for rated power into 8 ohms Input Impedance Voltage Gain Dynamic Headroom at 4 ohms Distortion, SMPTE Frequency response at 1 watt Damping Factor Noise (unweighted) Controls 64x (36 dB) for 8 ohm load 2 dB <0. 02% 20 k ohm balanced, 10 k ohm unbalanced 20 Hz to 20 kHz, 8 ohms, LF Filter bypassed: +0, -1 dB 5 Hz to 50 kHz, 8 ohms, LF Filter bypassed: +0, -3 dB >250, 8 ohm load 100 dB below rated output from 20 Hz to 20 kHz, 8 ohm load Front Panel- AC power switch, CH1 Gain control, CH2 Gain control Rear Panel- 10-pole DIP switch featuring LF Filter on/off, LF Filter 30/50 Hz, Clip Limiter on/off controls for each channel and switches for selecting Stereo, Parallel, or Bridge Mode. Push-button circuit breaker for each channel. [. . . ]