User manual PEAVEY DPC 1000

[. . . ] The DPC® 1400X represents years of digital power amplifier research packed into a one rack space power-house. Delivering 1, 400 watts into 4 ohms bridged, or 2 x 700 watts into 2 ohms in stereo, the DPC 1000 reaches new output heights. With all connections on the back panel and all the controls on the front panel, the DPC 1000 is certain to make life a lot easier for the installers and in live performance applications. you'll also find Peavey's patented DDTTM compression circuitry and combo connector inputs two really convenient and useful extras. [. . . ] ) INSTALLATION AND CONNECTION The DPC professional series of power amplifiers is designed for durability in commercial installations and has the quality of performance required in studio. These units are a standard rack-mount configuration height, and each is cooled by a variable-speed internal fan. All input and output connections are on the back panel. Additionally, the level controls and selector switches are on the front panel. The front panel also contains LED indicators for power and DDT activation, and the mains power switch. INDUSTRIAL AND COMMERCIAL INSTALLATIONS For commercial and other installations where sustained high power operation is required, the amplifiers should be mounted in a standard 19" rack. It is not necessary to leave a rack space between each amplifier in the stack since each fan pulls air in from the rear and exhausts the hot air out the front. However, an adequate cool air supply must be provided for the amplifier when rackmounted. The internal fan must have a source of air that is not preheated by other equipment. If cool, the amplifier will start up in low speed fan operation and will normally stay at low speed operation unless sustained high power operating levels occur. Then, as the amplifier heat sinks heat up, the automatic thermal sensing circuitry will increase the fan speed. For bridge mode usage, the enclosure impedance must be 4 or 8 ohms--never below 4 ohms!DDTTM Peavey's patented DDT (Distortion Detection Technique) compression circuit enables the user to maximize the performance of the amplifier/speaker combination by preventing the power amp from running out of headroom (clipping). This compression system is activated by a very unique circuit that senses signal conditions which might overload the amplifier and activates compression (reduces the amp gain) when clipping is imminent. Threshold of compression, then, is clipping itself, and no specific threshold control is used. This technique effectively utilizes every precious watt available for the power amplifier to reproduce the signal, while at the same time minimizing clipping and distortion and thus significantly reducing the potential of loudspeaker degradation and damage. the DDT system is an automatic hands-off approach to the problem of power amplifier clipping. Since the DPC Series power amplifiers use a fuse for "over current" protection, the DDT compression system plays even a more important role in continuous performance by preventing each channel from clipping and overload. Continuous operation at clipping can cause the fuse to blow, but with the DDT activated, this problem is minimized. For this reason, you should always have the DDT compression system enabled. Stereo mode, both channels driven 2 ohms, 1, 000 W power channel peak music power 4 ohms, 700 W power channel peak music power 8 ohms, 500 W power channel peak music power Bridge mode 4 ohms, 2, 000 W power peak music power 8 ohms, 1, 400 W power peak music power Because of this circuitry, the amplifier cannot slew rate limit. Stereo mode, both channels driven 1 kHz, 4 ohms rated output, less than 0. [. . . ] It should not be placed flat against a wall or placed in a built-in enclosure that will impede the flow of cooling air. This product should not be placed near a source of heat such as a stove, radiator, or another heat producing amplifier. Connect only to a power supply of the type marked on the unit adJacent to the power supply cord. Never break off the ground pin on the power supply cord. [. . . ]