Manual JBL Project K2 S9900 (page 29 of 42) (English, All languages)

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Project K2 S9900

CHAPTER 7

Project K2 S9900 Switch Operations

In addition to the input binding posts and connecting straps on the die-cast input

plate, the K2 S9900 has two level-adjustment controls, a bi-amp switch and a 9V

battery for biasing the signal capacitors. The battery is mounted under an access

cover which is held in place by two Phillips-head screws.

Figure 9.

HF Level

This switch adjusts the attenuation applied to the 476Mg (high-frequency unit)

by approximately 0.5dB over the range of 1,000Hz to about 15,000Hz. Midrange

and high-frequency sounds become softer by reducing the level and stronger by

increasing the level. This action is accomplished by trimming the main attenua-

tion resistors. No additional parts are inserted in the signal path and there is no

sonic deterioration caused by use of the control (Fig. 10).

Figure 10. Adjustment range of the high-frequency level control. Upper band

indicates +0.5dB and lower band indicates –0.5dB.

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JBL Project K2 S9900 Manual

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