HARMAN KARDON AVR55
Owner's Manual

System Configuration
23

6. The test tone will now be heard through the front right speaker. Once again, first listen to the test noise to determine if it is louder or softer than the previous two channels. If an adjustment is required, use the Speaker Level Adjust buttons m until the level is matched. In this case, the offset level for both front channels will be shown in the display, such as FL 0 FR +0. Only the FR indication will change, as only the front right channel is being adjusted at this time. When the level is equal to the front left and center channels, press the Channel Select button l to move to the next channel. 7. The test tone will now be heard from the right rear (surround) channel. Follow the instructions shown in the previous step until the volume level for this channel is equal to the others. Press the Channel Select button l after you have finished with the right rear to move to the final channel. 8. Adjust the output from the left rear (surround) channel as shown in the previous steps. Remember, the goal is to have the sound level equal to all previous channels, using the Speaker Level Adjust buttons m to make any needed changes.

9. At this point, you should make a final check on the adjustments. Press the Channel Select button l quickly so that you circulate the test noise among all the channels. Make a note of which channels need fine adjustments to raise or lower their level so that they are brought into line with the others. When an adjustment is needed, simply stop pressing the button and make the level change using the Speaker Level Adjust buttons m. 10. When you are satisfied that all channels have the same output level, press the Test Tone button i to return the AVR55 to normal operation. Delay Settings One aspect of the surround modes is the delay of audio signals between the front speakers and the rear speakers. Each surround mode is factory preset with a specific delay time, but it is possible to individually adjust the delay timing to custom tailor the sound to your individual taste and the acoustic conditions in your listening room or home theater. The factory setting is appropriate for most rooms, but some installations create an uncommon distance between the front and surround speakers that may cause the arrival of front channel sounds to become disconnected from surround channel sounds.

To resynchronize the front and surround channels, follow these steps: 1. Measure the distance from the listening/viewing position to the front speakers. 2. Measure the distance from the listening/viewing position to the surround speakers. 3. Subtract the distance to the surround speakers from the distance to the front speakers. a. When setting the delay time for the Dolby Digital surround mode, the optimal delay time is the resulting figure. For example, if the front speakers are ten feet away and the surround speakers are five feet away, the optimal delay time is figured as 10-5=5. Thus, in this example, the delay should be set at five milliseconds. b. When setting the delay time for the analog Pro Logic mode, take the result of the subtraction and add 15 to obtain the optimal delay time. For example, if the front speakers are ten feet away and the surround speakers are five feet away, the optimal delay time is figured as 10-5+15=20. Thus in this example, the delay should be set at twenty milliseconds.