User manual ELECTRO-VOICE P3000 EDS

[. . . ] The P3000 contains 48 high-power output devices with 12, 000 watts of dissipation capability. These devices are protected from overheating by four, three-speed, temperature-sensitive fans. [. . . ] These filters attenuate infrasonic and ultrahigh-frequency signals, preventing them from being amplified; this allows more effective use of the amplifier's power and adds a measure of load protection. These filters are switchable on/off for use in applications utilizing front-end units (like crossovers or equalizers) which have these filters built-in. A multifunction display keeps the user informed of the operating status of the amplifier. Separate LED displays for each channel show power on, input signal, output signal, limiter on and protection active. The P3000 has electronically balanced XLRtype input and output connectors that allow easy, problem-free connections and signal routing. The P3000 has an input routing switch that allows selection of either normal dual-channel operation, or parallel mono operation, which routes an input to both channels but still allows for independent level control. The P3000 also has a constant-gain option which allows the voltage gain to be fixed. This permits different amplifiers to be used in fixed installations without rebalancing, and ensures headroom is not wasted. The P3000's professional Neutrik Speakon® output connectors provide a sturdy, reliable connection and allow use of heavy wire for lossfree signal transmission. There are separate output connectors for channels A and B, and for the bridge mode. The bridge-mode connector is sealed with a plastic cover to prevent connection errors. To prevent ground loops from occurring, the P3000 is equipped with a ground-lift switch. When the amplifier is operated in a rack with units of different ground potential, the switch may be adjusted to eliminate hum. Calibrated, detented potentiometers on the front panel regulate the gain of the P3000. [. . . ] The amplifier shall have a constant-gain option that, with input level controls full clockwise, provides a 26-dB voltage gain that is identical to that of all Electro-Voice Precision SeriesTM power amplifiers. The power amplifier shall meet the following performance specifications: maximum input voltage, 7. 75 V rms; rated output power from 20-20, 000 Hz at less than 0. 1% THD, each channel, 750 watts into 8 ohms, 1, 200 watts into 4 ohms, 1, 500 watts into 2 ohms, 2, 400 watts bridged into 8 ohms and 3, 000 watts bridged into 4 ohms; hum and noise, at least 100 dB (A-weighted) below rated output power; frequency response, <10-30, 000 Hz (+0, ­3 dB) at any output power up to rated output power; damping factor, >300 at any frequency up to 1 kHz in any mode with an 8-ohm load; THD (total harmonic distortion), <0. 05% at 1 kHz at rated power; transient intermodulation distortion (DIN 30 or DIN 100), <0. 01%; crosstalk, <70 dB below rated output power. [. . . ]