DPC 1400X. The binding posts of each channel are wired in parallel with that channel’s 1/4" outputs. This allows for parallel speaker systems. The minimum impedance in stereo mode is 2 ohms. Use of the amplifier below the minimum 2 ohm rating could result in overheating and thermal shutdown. In bridge mode connect the banana plug of your speaker cable to the red binding posts of channels A and B. The red binding post of channel A is the positive output terminal and the minimum load impedance is increased to 4 ohms while in bridge mode. (Bridge mode is explained in more detail later in this manual.)
PARALLEL 1/4" SPEAKER OUTPUTS (11)
Two parallel 1/4" speaker output jacks are provided for each channel of the DPC 1400X. When adding speakers in parallel always keep in mind your total speaker impedance,
insuring that it does not drop below the minimum load impedance rating of the DPC 1400X.
FUSE (12)
The fuse is located in the cap of the fuse holder. If the fuse should fail, IT MUST BE
REPLACED WITH THE SAME TYPE AND VALUE IN ORDER TO AVOID DAMAGE TO TO EQUIPMENT AND TO PREVENT VOIDING THE WARRANTY. If the amp repeatedly blows fuses, it should be taken to a qualified service center for repair.
WARNING: THE FUSE SHOULD ONLY BE REPLACED WHEN THE POWER CORD HAS BEEN DISCONNECTED FROM ITS POWER SOURCE.
AC LINE CORD SOCKET (13)
Provided to accept the removable (IEC) type AC line cord. Connect only to proper source (see back panel markings.)
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
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 rack- mounted. 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. Depending upon signal conditions and amp loading, the fan speed may increase to a maximum value, or it may decrease to a minimum value. This situation is quite normal. 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
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