Setup guide

Dirac Theater Setup Guide Version 1.01

Document # 9301H40300V1.01

2.6. Final Sound Level Adjustments

After the Dirac Live

optimization procedure is complete, and Dirac Live

settings have been loaded, use

the SPL meter and the Dirac Live

test noise as described previously to adjust the AP20 Analog Output

Levels, if necessary, to match those shown in the table below.

• By adjusting the amplifiers, try to achieve the baseline levels. Set the SPL levels according

to the chart below.

Note that SPL readings for screen and surroundings should be measured un-weighted, or C-

weighted, with the meter set to slow.

Use an RTA to calibrate the proper level setting of the subwoofer.

Table 2: SPL levels

Channel Description SPL

1 Left 85 dBC

2 Right 85 dBC

3 Center 85 dBC

4 Sub bass 91 dBC*

5 Left Surround 82 dBC

6 Right Surround 82 dBC

7 Left Center 85 dBC

8 Right Center 85 dBC

* Subwoofer should be set to 10 dB of in-band gain (see SMPTE RP-200), which equates to

approximately 91 dBC (slow).

• If not possible to achieve the baseline, use the AP20 (Analog Output Levels) to make minor

adjustments.