User manual MERIDIAN AUDIO 565INSTL

[. . . ] Meridian 565 Digital Surround Processor in s ta ll a ti o n g u id e Sales and service in the UK Meridian Audio Ltd Stonehill Stukeley Meadows Cambs PE18 6ED England Tel (01480) 52144 Fax (01480) 459934 World Wide Web http://www. meridian-audio. com Part no: 565I/3 Copyright © 1995­1998 Digital Gramophone and Wireless Ltd. Manufactured under license from Dolby Laboratories Licensing Corporation (Canadian patent 1, 037, 877), Lucasfilm Ltd. (US patents 5, 043, 970; 5, 189, 703; 5, 222, 059), Trifield Productions Ltd, and Nimbus Records Ltd. Dolby, Pro Logic, AC-3, and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. [. . . ] q Press > or < until you see the display: Aspect 1 Configuring the digital surround processor The display will show: q Press > or < until you see the display: q Press A or V to step between the alternative layout options. When you have chosen the layout you want to use proceed to the next step. q Measure the distances between the speakers in your room and calculate the aspect ratio, as follows: Layout A aspect ratio = centre - surround depth left - right width 2 1. 4 1 . 71 . 5 q Use the A and V keys to select the nearest aspect ratio. If your layout has an aspect ratio greater than 2 or less than 0. 5 you should consider changing the speaker positions for optimum sound. 25 To specify the number of surround speakers q Press > or < until you see a display such as: q Press A or V to step between the following options: Configuring the digital surround processor To specify the type of the surround speakers q Press > or < until you see a display such as: q Press A or V to select Small if the rear surround speakers have limited bass handling (eg bookshelf speakers), or Large if they have full bass handling (eg Meridian DSP loudspeakers). If you have side surround speakers, an additional Side option Rears Small 2 Surrounds Option No Surrounds What it means No rear speakers. 1 Surround allows you to set the type of side speakers in the same way. One centre rear speaker (should be connected to REAR-R). 2 Surrounds L and R surround speakers; eg a THX system. 4 Surrounds L and R rear and side speakers. 26 To select a 5. 1 LFE subwoofer If you have the 7. 1 version of the 565 you can add an LFE subwoofer to layouts that do not normally have one (such as G, L, or M), or choose an LFE subwoofer instead of a mono subwoofer in layouts that have a subwoofer (such as A). q Press > or < until you see a display such as: q Press A or V to change the 5. 1 Sub option. With layouts with no subwoofer the choice is between No 5. 1 Sub or LFE 5. 1 Sub. For layouts with one or more subwoofers you can choose between Mono 5. 1 Sub, to give a standard THX 80Hz crossover, or LFE 5. 1 Sub, to give an 120Hz crossover. Option Initial value Xvr oe 8H 4z Crossover frequency 2 Bt 4 i?Y 24 Bit Upgrade Communications mode (500 Comms 500 Comms Configuring the digital surround processor LE F 51Sb . u or 200 Comms) Controller mode (Auto Setup, Controller, or Not Con. ) SsAd. = y. dr 1 Auto Setup System address (1­8) Po. dr= rdAd. 1 Product address (1­8) Volume mode (Main Volume or 2nd Volume) Main Volume To set other configuration options The other configuration options are generally set to an appropriate value when you reset the 565 to one of the standard settings, and you should not normally need to alter them; see Choosing standard settings, page 20. These options are summarised in the table opposite for advanced use: FP Volume?N Front panel volume (N or Y) 27 Setting up the speaker outputs The next stage in configuring the 565 is to specify information about each of the speakers in your layout, and adjust their delays to time-align the system so that sounds are coincident when they arrive at the listening position. Sub Centre Left Right To time-align the system Configuring the digital surround processor Before setting up the speaker outputs you need to measure the distance, in cm or inches, to each speaker from the listening position. q As you measure each distance, write it against the appropriate line in the diagram opposite (or a copy of it). Measure from the ear height at the listening position to the tweeter on each speaker (where applicable). Then decide which speaker is furthest from the listening position; this distance is referred to as furthest below. Left Side Right Side Left Rear Surround Sub Right Rear 28 To set up a speaker output q Switch off the 565, using the power switch on the back panel. q Switch off any power amplifiers that are connected to the 565. q Switch on the power again while holding down the Source key on the front panel. Speaker Set To change the settings for a speaker q Press Source until the name of the speaker output you want to adjust appears. 1 Main Left For example: If the speaker output does not appear check that you have chosen the correct layout; see Specifying the speaker layout, page 22. Configuring the digital surround processor The display will show: 1 Main Left and then after a short delay: q Press Source to step between the different speakers specified in the layout you have chosen. q Change the settings for each speaker as described below. To select the output type q Press > until you see a display such as: The number specifies the number of the output, and corresponds to the labelling on the analogue or digital outputs on the back panel. The option specifies the type of speaker you are using, and whether you are using the analogue or digital output connection. 1Mrda eiin 29 q Use A and Vto choose between the following options: Choose this Meridian For this type of speaker A Meridian DSP Loudspeaker such as the DSP5000, DSP5000C, DSP6000, or DSP6000C connected to the appropriate digital output. Configuring the digital surround processor To set the output delay q Press > or < until you see a display such as: q Using the diagram you completed at the start of this section, calculate the correct delay as follows: For measurements in inches: For measurements in cm: 1Dly+. ea 00 Digital A digital signal for feeding a DAC directly from the appropriate digital output. delay = delay = furthest - distance 12 furthest - distance 30 Analogue A power amplifier or active speaker connected to the appropriate analogue output. where distance is the distance to the speaker you are setting up, and furthest is the distance to the furthest speaker. For example, if the main left speaker is 120" (300cm) from the listening position, and the furthest speaker is 180" (450cm) away, set the delay for the main left speaker to +5. 0. Note that when you are setting up the furthest speaker its delay should work out to be zero. Repeat this for each of the speakers in your layout. 30 To set up speaker protection for 5. 1 sources Because of the high bass levels that 5. 1 channel sources are capable of reproducing, the digital surround processor allows you to set up automatic protection of each full-range speaker or subwoofer in your system. [. . . ] Other sources of hiss may be tracked down using either: r The Mute option. When muted the outputs are reduced to the dither at the selected precision. r The Silence test signal; see Test signals, page 44. Crackling on optical inputs Some optical sources, in particular some LaserDisc players, provide poor drive waveforms that do not meet the EIAJ standard, in that the light modulates but never goes quite `black' between pulses. If you experience crackling on the optical input or an occasional reluctance to lock, ie provide a sound, investigate as follows. [. . . ]