User manual MCINTOSH MAC3

[. . . ] OWNERS MANUAL Surround Decoder, Dolby Digital (AC-3) MAC-3 Manufactured under license from Dolby Laboratories. Dolby, AC-3, Pro Logic and the Double D symbol are registered trademarks of Dolby Laboratories. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 Thank You, Please Take A Moment, Customer Service and Table of Contents Thank You For your decision to own this McIntosh MAC-3 Surround Decoder ranks you at the very top among discriminating music listeners. The McIntosh dedication to Quality, is assurance that you will receive many years of musical enjoyment from this unit. [. . . ] This difference in sound arrival times can degrade the listening perception of some sound tracks. The MAC-3 allows you to adjust the center speaker time delay to correct for this difference so the sound from the center speaker reaches the listening area at the same time as sound from the front left and right speakers. NOTE: The MAC-3 center delay can be adjusted from 0 to 5ms. Each millisecond delay corresponds approximately to 1 foot in distance. /()7 )5217 &(17(5 )5217 5, *+7 )5217 lay to correspond to the difference in feet. Measure the distance from the listening area to the center speaker and then the front left and right speakers. If the center speaker is the same distance as the front speakers, no calibration is necessary since the default factory setting is 0ms. If the center speaker is closer than the front speakers you should adjust the delay to correspond to the difference in feet. Press the CNTR/DELAY push-button to start delay calibration procedure. Adjust the VOLUME control until the DELAY/VOLUME display reads a number equivalent to how many feet closer the center speaker is to the listening area. Press the CNTR/DELAY push-button a second time to exit the delay procedure. Surround Speaker Delay If the surround speakers are located closer to the listening area than the front speakers, their sound will reach the listener before the sound from the front speakers. This difference in sound arrival times can degrade the listening perception of some sound tracks. The MAC-3 allows you to adjust the surround speaker time delay to correct for this difference so the sound from the surround speakers reaches the listening area at the same time as sound from the front left and right speakers. NOTE: The MAC-3 surround delay can be adjusted from 0 to 15ms. Each millisecond delay corresponds approximately to 1 foot in distance. /()7 )5217 &(17(5 )5217 5, *+7 )5217 /HIW 6SHDNHU 'LVWDQFH &HQWHU 6SHDNHU 'LVWDQFH 5LJKW 6SHDNHU 'LVWDQFH 6 8 % : 2 2 ) ( 5 / ( ) 7 6 8 5 5 2 8 1 ' , '($/ /, 67(1, 1* $5($ 5 , * + 7 6 8 5 5 2 8 1 ' )URQW 6SHDNHUV 'LVWDQFH 6 8 % : 2 2 ) ( 5 The first time you press the CNTR/DELAY push-button, the DELAY/VOLUME display will indicate 0ms, which is the factory default setting equivalent to no delay. This corresponds to a listening room where the center speaker is the same distance from the listening area as the front left and right speakers. If your center speaker is closer to the listening area than the front left and right speakers, adjust the de- Figure 1 / ( ) 7 6 8 5 5 2 8 1 ' , '($/ /, 67(1, 1* $5($ 5 , * + 7 6 8 5 5 2 8 1 ' 6XUURXQG 6SHDNHUV 'LVWDQFH Figure 2 11 How to Operate with a C39/MX130 The first time you press the SURR/DELAY push-button the DELAY/VOLUME display will indicate 5, which is equivalent to a 5 millisecond delay which is the factory default setting. This would correspond to a typical listening room where the surround speakers are 5 feet closer to the listening area than the front speakers. If your surround speakers are in a different location, adjust the delay to correspond to their distances from the listening area relative to the front speakers. Measure the distance from the listening area to the surround speakers, and then to the front left and right speakers. If the surround speakers are the same distance as the front speakers, the calibration delay should be set to 0ms. If the surround speakers are closer than the front speakers you should adjust the delay to correspond to the difference in feet. Press the SURR/DELAY push-button to start delay calibration procedure. Adjust the VOLUME control until the DELAY/VOLUME display reads a number that is the same as the number of feet measured in Step 1. [. . . ] While the MAC-3 is on depress and hold in the STANDBY/ON/RESET push button for five seconds, this will reset the MAC-3s microprocessors. Figure 6 A Place for Your Notes NOTE: The above condition is usually caused by either interruptions in AC power and/or major changes in voltage. A Place for Your Notes 17 Specifications Specifications Frequency Response STEREO Left and Right Small speakers: 80Hz-20, 000Hz. Left and Right Large speakers: 20Hz-20, 000Hz. PRO LOGIC Left, Center, Right, Small speakers: 80Hz-20, 000Hz. Left, Center, Right, Large speakers: 20Hz-20, 000Hz. [. . . ]