JBL AV1 manual Calibrating Output Levels

Setup JBL Performance

CALIBRATING OUTPUT LEVELS (continued)

Note:

The AV1 automatically sets volume level to +0dB when the internal noise test begins. Avoid adjusting master volume level while the test is in progress to achieve a 75dB THX reference level (a 75dB SPL meter reading).

When the internal noise test is conducted, a calibration test signal travels to the audio output connectors in the order listed on the SPEAKER LEVEL ADJUST menu. As the calibration test signal travels, the cursor automatically scrolls downward through SPEAKER LEVEL ADJUST menu parameters, highlighting each speaker parameter as the corresponding output connector is tested. Each output connec- tor is tested for about 4 seconds.

The SPEAKER LEVEL ADJUST menu can be used to manually adjust output levels while the internal noise test is conducted. See “Speaker Level Adjust” on page 3-40for more information.

To manually adjust output levels while the internal noise test is conducted:

1. Set the SPL meter to C weighting and SLOW response.

2. Press the remote control and arrows to highlight the desired SPEAKER LEVEL ADJUST menu parameter.

3.When the desired parameter is highlighted, quickly press the arrow to select the parameter. A horizontal bar graph opens in the on-screen display.

4. When the horizontal bar graph opens, press the arrow to

adjust the selected parameter. All output levels should be adjusted to achieve a 75 dB SPL meter reading from the pri- mary listening position.

5.When the desired adjustments have been made, press the arrow to close the horizontal bar graph and return to the SPEAKER LEVEL ADJUST menu. The internal noise test will con- tinue, and automatic scrolling will resume.

Note:

Audio output connectors for which the corresponding CUSTOM or THX SETUP menu parameter is set to NONE cannot be adjusted during the internal noise test. These output connectors can be adjusted during the external noise test, but there is no need to do so.

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