Abbingdon Music Research LS-77 owner manual Connecting the amplifier, Multi-channel set up

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Always switch your amplifier off when making or b r e a k i n g connections.

3.2. Connecting the amplifier

Connect the other cable ends to the loudspeaker outputs of your switched-off power amplifier. When using Speakon® equipped speaker cables you only need to identify the correct channel and connect the cable. If using two or four pole speaker cables of conventional design, please make sure that the red marked posts of the speaker are connected to the red marked output of your amp, and the white or black marked posts to the white or black marked output accordingly.

AMR loudspeakers feature a carefully matched and fine-tuned crossover, to achieve a truly balanced and smooth frequency response. However, optimising the frequency bands through bi-wiring or bi-amplification can offer significant benefits. Please consult your authorised AMR retailer for recommendations and demonstrations and see the Appendix C - Biamplifying the LS-77 for options using AMR equipment.

3.3 Multi-channel set up

The AMR LS-77 Reference Class Professional Monitor is designed to offer the most advanced performance in both stereo and multi-channel applications, effectively enabling the maximum performance from either of these formats. When connecting a loudspeaker to a multi-channel system, in general the same guidelines as previously mentioned in the text above will apply. Because there are many different set up options - from 5.1 to 10.2 channel applications - and due to the fact that loudspeaker positioning will also depend upon the room's particular shape, please consult your authorised AMR retailer for special applications and placement options.

3.4 Choice of loudspeaker cable

The loudspeaker cable may may have a dramatic effect on sound quality, though in general, quality cable products will yield a quality result. The LS-77’s are designed to be very neutral, and as such are not extremely reliant on any one particular type of cable. The choice of cable is as much a factor of matching the cable to the entire audio system, while also a matter of personal taste and preference. In an all AMR System AMR's OptiLink Speakon® connector equipped cables are highly recommended.

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Contents LS-77 Reference Class Professional Monitor Loudspeakers Page Page Running-In PrecautionsContents Page Front Panel of the LS-77 UnpackingPlease check that all contents are present LS-77 Front Fascia Component OverviewContact with the chassis Setup Connecting the loudspeakersUsing AMRs OptiLink Speakon Cable Speaker R Speaker L Using Binding Posts Speaker Cable Stereo Amplifier Interconnect Cable Connecting the amplifier Multi-channel set upChoice of loudspeaker cable Positioning Symmetry and room modesDistance between the loudspeakers Distance to back and side walls Distance to the loudspeakersLevelling/Speaker Support Room and furniture influence Loudspeaker Toe-inCare and maintenance Care & MaintainanceRunning-in the loudspeakers Power rating LS- 77 Technical Features Troubleshooting Guide TroubleshootingSpecifications Table SpecificationsAppendix a Adjustment of tonal balan ce HF Level Placement Suggestions HF Level R1 Placement Appendix B Abbingdon Acoustic Setup Regime Page ~100″/254cm ~115 ″/290cm Page Page Appendix C Biamplifying the LS-77 LS-77 Speaker R Speaker L Speaker Cable AM-77 Control Center Edition CCE Appendix D The AMR Active SystemLine Level Connection Setting up the AMR Active SystemSpeaker Connection Scenario Testing and Troubleshooting the AMR Active System LS-77 Speaker L AMR Active System Configuration DiagramIntroducing AMRs OptiArray scalable acoustic system Appendix E LS-77 in OptiArray configurationsPage AMR recommends the following OptiArray Setups Epsilon/Zeta Iota/Zappa Omicron/Sigma Epsilon/Zeta System wiring Reverberation time Appendix G Acoustics Background In formationAcoustics Good acousticsPage Membrane absorbers DiffusersAbsorption or Diffusion ? AbsorbersPorous absorbers Standing WavesRoom modes
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