User manual ELECTRO-VOICE Q66 EDS

[. . . ] In the bridged mode, the amplifier can deliver more than 1, 200 watts into 8 ohms and 1, 700 watts into 4 ohms at less than 1% THD. The power supply with its large torodial transformer gives the amplifier impressive headroom and current output capability. The Q66 contains 20 high-power output devices with 5, 000 watts of dissipation capability. [. . . ] There is easily readable nomenclature to ensure easily repeatable control settings. The Electro-Voice Q66 is an excellent choice for high-quality professional sound system applications which require excellent sound quality, speaker protection and the highest level of construction quality and long-term reliability. Q66 Stereo Power Amplifier Architects' and Engineers' Specifications The power amplifier shall be a dual-channel model of solid-state design employing highpower output devices in a true-complementary-symmetry output circuit. It shall be capable of operating from a 120/220/240-V, 50/ 60 Hz ac line. The power amplifier shall meet various worldwide safety standards including Underwriter's Laboratories UL-813 standard, Canadian Standards and CE standards. The power amplifier shall contain a limiter circuit driven by a high-quality input/output comparator to protect the load from damage by amplifier clipping. The amplifier shall contain sensing circuitry to provide protection for the output transistors against overtemperature, excessive output voltage, shorted loads, excessive phase shift and back-EMF current. The load shall be similarly protected against start-up/shutdown transients, low ac line voltage and dc. Rear-mounted controls shall include detented level potentiometers for each channel, an input routing switch for selecting dual/stereo or parallel mono operation, a switch for selecting dual/stereo or bridged operation and a chassis groundlift switch. Rearmounted input connectors shall include a 3pin female XLR-type connector wired in parallel with a male 3-pin XLR-type output connector for signal routing. Output connectors shall be Neutrik Speakon NL4MP's for channels A and B, and another for bridged operation. Front-panel indicators shall include power on, a protection indicator and separate signal present and limiter indicators for each channel. Front-panel controls shall include a power on switch. The power amplifier shall meet the following performance specifications: rated output power from 20-20, 000 Hz at less than 0. 2% THD, each channel 300 watts into 8 ohms, 500 watts into 4 ohms and 650 watts into 2 ohms. In bridged mode at 1 kHz, the amplifier shall deliver 1, 200 watts into 8 ohms and 1, 700 watts into 4 ohms. [. . . ] Specifications subject to change without notice. 2 Q66 Stereo Power Amplifier Q66 Stereo Power Amplifier Figure 1--Front and Rear Panels Q66 Stereo Power Amplifier Figure 2--Block Diagram 3 Q66 Stereo Power Amplifier Specifications Conditions: 1. Dual-mode ratings are for each channel both operating, unless noted. 120-volt ac line voltage maintained throughout testing. [. . . ]