Yamaha AV-75PRO AV-75PRO OWNERS MANUAL - Page 9

[ -----76SINC.THE s.3,:q---iRoovlo- ouND PROCESS 3R This unit incorporates a sophisticated surround-sound processing circuitry which allows you to expand the audio sound field for a theater-like experience in the listening/viewing room. SPEAKER PLACEMENT In a full 5-channel system you will use two pairs of speakers: the FRONT SPEAKERS, the REAR SPEAKERS, and the CENTER SPEAKER. You will probably use your present stereo speaker system for the FRONT SPEAKER pair. The rear and center speakers do not need to be of such high quality. But they should have high enough power handling to accept the maximum output of this unit that will drive them. FRONT SPEAKERS Place the FRONT SPEAKERS in the normal position. REAR SPEAKERS Place the REAR SPEAKERS beside your listening position and facing a little inward. They should be nearly six feet up from the floor. CENTER SPEAKER Place the CENTER SPEAKER precisely between the two FRONT SPEAKERS. (To avoid interference, use a magnetically shielded speaker. If, however, it is not effective, keep the speaker away from TV sets.) Fron Speaker R Center Speaker Front Speaker L Rear Speaker Rear Speaker Rear Speaker Rear Speaker SURROUND MODES DO DOLBY PRO LOGIC SURROUND This unit employs the Dolby Pro Logic Surround Sound system. This system is similar to professional Dolby stereo decoders used in movie theaters, and the effect is more realistic than the conventional Dolby Surround Sound Processing System for home use. The Dolby Pro Logic Surround Sound system, by employing a fourchannel system, divides the input signals into four levels: the left and right main channels, the center channel (to characterize dialogue), and the rear surround-sound channels (to characterize sound effects, background noise and other ambient noise). As a result, compared to the conventional 3-channel surround-sound system, the yield of the true center channel is added, thus even further expanding the width of the surround-sound effect. Dolby surround-sound is encoded on the sound track of commercially available video cassettes and video discs as well. When you play a source encoded with Dolby surround-sound on your home video system, the Dolby Pro Logic surround mode on this unit decodes the signal and feeds the surround-sound effects. The Dolby Pro Logic surround mode will have no effect on video sources not encoded with Dolby surround-sound. Note If a graphic equalizer is connected to this unit, be sure all equalizer's controls are set to the flat position when this unit is in the Dolby Pro Logic surround mode. Otherwise, Dolby Pro Logic playback will not be reproduced accurately. DOloamy SURROUND TM Manufactured under license from Dolby Laboratories Licensing Corporation. Additionally licensed under one or more of the following patents: U.S. numbers 3,632,886,3,746,792, and 3,959,590; canada numbers 1,004,603 and 1,037,877. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.