User manual QSC AUDIO PLX 2502 REV E

[. . . ] WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. FCC INTERFERENCE STATEMENT NOTE: This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance to the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. [. . . ] 5 Input Configuration Switch (PLX 1802/2502/3102/3602 models only) Select the input configuration by sliding the switch to the position which corresponds with the desired input configuration. ·Bridge- upper position ·Stereo- middle position ·Parallel- lower position Stereo Mode: Each channel remains independent, and each may be used for a different signal. Each channel's Gain control and speaker connection remain independent. Bridge Mode: This setting combines both channels into a single channel with twice the output voltage. Low Frequency filter selection switches for each channel Clip Limiter ON/OFF switch Input Configuration selector switch Clip Limiters (PLX 1802/2502/3102/3602 models only) The amplifier has a clip limiter with an on-off switch. The limiter only responds to actual clipping, and automatically compensates for load and voltage variations. Clip limiting is generally recommended, especially to protect high frequency drivers. ·Set the switch DOWN (OFF position) to disable the clip limiter. Low Frequency Filters (PLX 1802/2502/3102/3602 models only) Each channel has independent filter selection of Full Range (infrasonic filter only), 33 Hz low cut, 100 Hz low cut, or 100 Hz High Cut. This allows tailoring the amplifier performance to that of the loudspeakers, offering the best possible performance from the system. Proper filtering reduces distortion and prevents amplifier overload. TOP / FULL / SUB Switch: Select the type of loudspeaker being driven by each channel. ·Set the switch to the left for driving "top" boxes; applies 100 Hz low cut ·Set the switch to the middle position for "full range" loudspeakers. ·Set the switch to the rightmost position for driving subwoofers. Bridge mode configures the channel pair to drive a single high-power loudspeaker load. Set Channel 2's Gain control at minimum. PLX 1802, PLX 2502, PLX 3102, and PLX 3602 Output Connectors: Do not use less than 2 ohm impedance loads with these models. Binding Post Connectors (PLX 1802/2502/3102/3602 models only) Stereo and Parallel Mode: Connect each loudspeaker to its own channel of the amplifier, as shown on the chassis label. The INPUT CONFIGURATION switch must be set for STEREO or PARALLEL mode. Bridge Mode: Bridge mode configures the channel pair to drive a single high-power loudspeaker load. Set Channel 2's Gain control at minimum. OUTPUT TERMINAL SAFETY WARNING!BRIDGE MONO (BR M) and PARALLEL (PAR) (PLX 1802/2502/3102/3602 models only): ·Each channel pair has a AMBER LED for Bridge Mode, and a AMBER LED for Parallel mode. These show how the rear panel INPUT CONFIGURATION switch is set (see Input Configuration Switch). 9 LED indicators on PLX 1104 and PLX 1804 models LED indicators on PLX 1802, PLX 2502, PLX 3102, and PLX 3602 models Gain Controls Turn the GAIN controls clockwise to increase gain and counter clockwise to decrease gain. The upper 14 steps are about 1 dB each, and settings should normally be made within this range. The range below 14 dB should not be used for normal program levels, as the input headroom could be exceeded, but can be used for testing at reduced levels. Gain controls and LED cluster on PLX 1104 and PLX 1804 models Gain controls and LED cluster on PLX 1802, PLX 2502, PLX 3102, and PLX 3603 models Power Switch Push in on the top of the rocker switch to apply AC mains power to the amplifier. [. . . ] If input signals are still too high, the amplifier may eventually mute for about 30 seconds with the fan at full speed for maximum cooling. Make sure the rear intake is getting a free flow of cool air. 11 Specifications PLX 1104, PLX 1804 PLX 1104 OUTPUT POWER (Watts) (1) PLX 1804 550 600 800 900 0. 02% 20 - 20k Hz, 0. 05% THD, 8 ohms/Ch. DISTORTION, SMPTE-IM FREQUENCY RESPONSE SIGNAL to NOISE, unweighted, 20 - 20k Hz VOLTAGE GAIN INPUT SENSITIVITY, Vrms for rated power into 8 ohms OUTPUT CIRCUIT TYPE INPUT IMPEDANCE DYNAMIC HEADROOM DAMPING FACTOR (8 ohms) AMPLIFIER PROTECTION COOLING CONTROLS Front: Back: 310 325 500 550 0. 02% 20 - 20k Hz, ±0. 5 dB, all models -108 dB 32. 5 dB -106 dB 34. 9 dB 1. 18 (+3. 7 dBu) AB 10k ohms unbalanced, 20k ohms balanced 2 dB at 4 ohms >200 1. 20 (+3. 8 dBu) AB/H Short circuit, open circuit, thermal, ultrasonic and RF protection. Stable into reactive or mismatched loads Continuously variable speed fan; back-to-front air flow through heat sink array AC POWER switch, Gain controls (each channel) 21 detents AC circuit breaker LED INDICATORS POWER (blue), SIGNAL (green x 2), -10 dB (green x 2), CLIP (red x 2) CONNECTORS Input: 1/4-inch TRS and female XLR; 20k ohm balanced, 10k ohm unbalanced Output: Speakon connectors: Ch 1, 4-wires (Ch 1 + Ch 2); Ch 2, 2-wires (Ch 2 only) LOAD PROTECTION POWER REQUIREMENTS DIMENSIONS Turn-on/turn-off muting, DC fault blocking, Clip limiting, Infrasonic filter (-3 dB at 5 Hz) Refer to rear panel serial number label. [. . . ]