User manual PEAVEY DPC 1400X

[. . . ] 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 persons. CAUTION: To reduce the risk of electric shock, do not remove cover. WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance, read the operating guide for further warnings. [. . . ] If cooling is inadequate due to preheated air or a reduction of air flow occurs due to blockage of the amplifier inlet/outlet ports, or if the amplifier is severely overloaded or short circuited, the amplifier thermal sensing system may cause temporary shutdown of the unit. This is indicated by the status LEDs on the front panel illuminating red. Depending upon the available cooling air, operation should be restored relatively quickly, and the In any event, corrective action should be taken to determine the cause of the thermal shutdown. If the amplifier is not severely overloaded or shorted and air flow is normal in and out of the amplifier, then steps should be taken to provide a cooler environment for all the amplifiers. As a general rule, the cooler electronic equipment is operated, the longer its useful service life. STUDIO AND FACILITY INSTALLATION In most low to medium power applications, the power amplifier can be mounted in any configuration. it is desirable that , if at all possible , the power amplifier be located at the top of an equipment stack. This will prevent possible overheating of sensitive equipment by the hot air rising from the power amplifier. As a general rule, most studio requirements will never cause high speed fan operation. However, if they do, this may indicate that you have not taken the necessary steps to provide adequate cooling. Remember, closed up in a cabinet, a DPC Series power amplifier will have severe cooling problems, even at low power levels. Again, inadvertent short circuit or sustained overload usage could also cause temporary thermal shutdown and/or blowing of the fuse. Also, most home wiring and electrical circuits are only 15 amps. BRIDGE MODE The bridge mode on stereo amplifiers is often misunderstood as to the actual operation and usage. In basic terms, when a two-channel amplifier is operated in the bridge mode, it is converted into a single-channel unit with a power rating equal to the sum of both channels' power ratings at a Load Rating of twice that of the single channel rating. For example, the DPC 1400X is rated at 700 watts RMS per channel into 2 ohms. The bridge ratings are 1, 400 watts RMS into 4 ohms (minimum load). Bridge mode operation is accomplished by placing the mode switch in the "BRIDGE" position, connecting the positive speaker lead to Channel A red binding post, negative speaker lead to Channel B red binding post, and using Channel A as the input channel. All Channel B input functions are defeated, and they serve no purpose now. Another common use for the bridge mode is in subwoofer applications where very high power levels are required to reproduce extreme low frequencies. Such enclosures usually contain 2 or 4 loudspeakers to handle the power levels involved. For bridge mode usage, the enclosure impedance must be 4 or 8 ohms--never below 4 ohms! [. . . ] For more information on grounding, write for our free booklet "Shock Hazard and Grounding. Power supply cords should always be handled carefully. Never walk or place equipment on power supply cords. Periodically check cords for cuts or signs of stress, especially at the plug and the point where the cord exits the unit. [. . . ]