Crown Com-Tech CT-200 Betriebsanweisung PDF herunterladen (Seite 18)

ASTi Crown

Power Amplifier User Guide (Ver. 1, Rev. E)

• Channel Level Controls – act as the overall master gain control for each channel in all

operational modes. The exact setting required for any specific installation will depend on a

number of factors including speaker placement, speaker sensitivity, size of the space being

driven, and of course the required sound level required from the system.

Conventional audio set-up procedures apply, such that the signal source should be set to the

maximum level achievable while avoiding overload (clipping) for the loudest signal levels

required from the system (typically the “crash” sound for a flight simulator), this affording

the maximum signal-to-noise performance, and then setting the amplifier Channel Level

Controls to achieve the required loudness for this particular sound. Please refer to section

2.3. in this document for the recommended setup.

The final setting determined for each Channel Level Control should be documented to allow

the system to be returned to ‘tuned’ state, should it be necessary to replace the amplifier due

to failure, or to allow production programs to be identically configured. This may be docu-

mented by counting the detent value selected for each channel.

Note the Channel Level Control is a precision attenuator, and each detent of the control cor-

responds to the following attenuation:

Detent 4/8 Ohm

0 (full CCW) -68.31

1 -67.54

2 -32.23

3 -25.46

4 -21.83

5 -19.23

6 -17.12

7 -15.36

8 -13.76

9 -12.28

10 -10.84

Do not exceed setting 10.

11 -9.51

12 -8.28

13 -7.09

14 -6.30

15 -4.92

16 -3.82

17 -2.62

18 -1.35

19 -0.01

20 (full CW) 0.00

Attenuation is in dB, attenuation amounts shown may vary ± 6 percent. Level-control Attenuation

per Detent.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 31 32

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