Harman Kardon CA260 Owners Manual - Page 3

3 0 Amperes of HCC (High Instantaneous Current Capab~litym) a ~ n t a ~ nas wide dynamic range and low distortion when driving low impedance or reactive loads. High Power Output of 6 0 watts per channel Into 4 Ohms, 9 0 watts per channel into 2 Ohms and 180 watts bridged-mono into 4 Ohms. Ultrawide Bandwidth is achieved by the use of inherently fast open-loop circuitry This improves transient accuracy and phase linearity Low Negative Feedback Highly linear circuitry produces low distortion w ~ t honly 25dB of negative feedback. Thls further improves dynamic accuracy. Discrete Component Audio Circuitry is used because ~twas found to be the only way to provide HCC, Ultrawide Bandwidth and Low Negarive Feedback. H ~ g hCapacity Power Supply Two 10,000pF capacitors, six 8 0 watt switching transistors, and a sophisticated transformer coil design enable stable operating voltages even under h ~ g hpower conditions. This results In lmproved low frequency sound quality. High Heat Diss~pat~oCnapability is provided by a large heatsink, efficient circuitry and rugged circuit components Protection Circuitry assures high reliability under high temperature, overvoltage, reverse-voltage and short-circuit conditions, without degrading the sound quality during normal high power operation. When the internal temperature reaches 175" F (80' C), the maximum output power IS reduced, which In turn reduces the operating temperature Built-in Active Crossover and Bridged-mono features prov~deoperating flexibility, system s~mplicityand added value. Be sure that metal objects or other fore~gnmater~alsdo not enter the unlt This can cause immediate trouble or reduce the unit's long-term reliability. It IS natural for thls unlt to become warm whlle operating It ~ncorporates two thermal protection circuits: One to prevent excessive temperatures from being developed under normal operation, and another to shut off the unit when operating abnormally When the thermal protection system is operatmg, the amber mdcator wdl illuminate It is recommended that t h ~ sunlt be operated in a vehcle only whde the engine (and electrical charging system) is running. At high power output, it typically draws about as much current as an automobile's headlights, and therefore can eventually discharge the battery. The speaker output terminals are protected from damage due to short-circuited speakers or speaker wires. When this protection circuitry IS momentarlly actlvlated, the power output IS muted for several seconds and is then restored. When the terminals are continuously short-circuited, the power output w ~ lrlemaln muted Should the latter occur, shut off the unit and check the speakers and speaker wires. The heat generated by this amplif~eris dissipated into the alr by the entire chassls If it IS covered, or becomes d ~ r t yso that the clrculatlon of the alr around it is reduced, the unit's ability to dissipate heat will also be reduced. Under most conditions, the heat dissipating capability of this unit is more than enough to provlde uninterrupted operation However, when full power is drawn in an already hot environment, any loss in heat dissipating capability is likely to result in activating one of the thermal protection circuits T h ~ sunlt uses a 3 0 ampere auto fuse When replacing the fuse, be sure to use an identical 30 ampere (green)auto fuse. To replace the fuse, remove the cover by pushing down on the top of the fuse cover Use the spare fuse which is stored above In the fuse compartment. If your unit behaves abnormally, turn it off immediately and consult an authorized Harman Kardon Service Station