User manual HARMAN KARDON CITATION XX

[. . . ] A 1 Hz filter is inserted into the circuit to cut off the unwanted signal component. The green "infrasonic" indicator illuminates, and the red warning display will soon turn off. [. . . ] The green "ultrasonic" indicator illuminates and, at the same tlme, the red indicator will turn off. A two-pole Bessel filter (100 kHz) i s inserted into the Bessel circuit, and the mixed radio signal is removed from the music signal. T h ~ s filter was chosen over other types because its effect on audible frequencies is less likely to be noticed. When amplifier clipping occurs the high frequency distortion may cause the "ultrasonic interference" indicator to illuminate for a short per~od. This is not a fault, but an indication that the input signal should be reduced. Connection diagram Bias selection switches This unit enables bias selection in 3 stages (low, normal and high). The bias settings allow the effective use of the heat stnk thermal capatity by adjusting the idle current to the operating conditions. , low position The low bias position reduces the bias but is the optimunl setting for continuous use at high, power levels. The low bias position is also optimal for use at a high room temperature and/or a poor heat radiation environment. Operating procedure Before turning the power on, be sure to check that all connections are correct. Turn the volume control knob o f your preamplifier t o the minimum level. Press the high bias switch when it is desired to expedite warming up of the amplifier. In about 7 seconds, the "wait" indicator goes off, the green "on" and "Citation X X " indicators illuminate and the amplifier is ready for operation. (iradually increase the preamplifier volunle and sound will be heard from the speakers. [. . . ] a In case of abnormal heat generation, refer to the explanation of blas selectton switches. Specifications Output normal htgh Input sensitivity Filter Infrasonic Ultrasonic Power source Power consumption Dimensions Weiqht 8 R load 4 2 load S IVIlSkR 250W x 2 440W x 2 IUW I B l A S 1 1Hz (6dB/octl lOOkHz (Secondary bessel filter) ACllOV6OHZ 1050W 425mm(W) x 195mm(H) x 487mm(Dl 42kg The design and specifications are subject t o change for improvement wtthout notice. Locations for installation Avoid the following locations for safe operation of this unit: Place exposed to direct sunlight, near a heat source. s Humid or dusty place, or a place exposed to direct vibration such a on a speaker. [. . . ]