Abbingdon Music Research LS-77 owner manual Care & Maintainance, Care and maintenance

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Section 5-Care & Maintainance

Never use aggresive or abrasive cleaners!

5.1 Care and maintenance

To maintain the aesthetic quality of the LS-77 Reference Class Professional Monitors for the long term, placing them into a very warm, very cold, or very humid environment should be avoided. Direct sunlight or excessive brightness can affect the drivers but will have no effect on the Aluminum Enclosure..

The cabinet and other plain parts should be cleaned with a soft dry or slightly damp cloth. Please avoid any aggressive cleaning fluids or abrasive cleaners. Dust on the woofer diaphragms or the tweeters waveguide may be removed with a fine furniture brush.

For safety reasons, please switch off all the components of your system when cleaning any of these components. As any form of cloth or foam cover or metal grille interferes significantly with sound reproduction, no grill is included.

All materials used by AMR are integrated into the LS-77 Reference Class Professional Monitors with exceptional care. By taking care of your LS-77 Reference Class Professional Monitors, you will preserve the finish and build quality for a very long time.

5.2 Running-in the loudspeakers

The moving parts of a newly manufactured LS-77 Reference Class Professional Monitors have been acoustically checked after production, but nevertheless are not as flexible as they need to be for optimum performance results to be realised. The higher the quality of any driver system, the more demanding the loudspeaker will be regarding time for running-in the system. A newly unpacked pair of AMR speakers therefore requires several weeks of running in or playing to reach its optimum performance capability. After that period, a couple of minutes before every listening session will be helpful to ‘warm up’ the loudspeakers.

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Contents LS-77 Reference Class Professional Monitor Loudspeakers Page Page Precautions Running-InContents Page Unpacking Front Panel of the LS-77Please check that all contents are present Component Overview LS-77 Front FasciaContact with the chassis Using AMRs OptiLink Speakon Cable SetupConnecting the loudspeakers Speaker R Speaker L Using Binding Posts Speaker Cable Stereo Amplifier Interconnect Cable Choice of loudspeaker cable Connecting the amplifierMulti-channel set up Distance between the loudspeakers PositioningSymmetry and room modes Distance to the loudspeakers Distance to back and side wallsLevelling/Speaker Support Loudspeaker Toe-in Room and furniture influenceRunning-in the loudspeakers Care and maintenanceCare & Maintainance Power rating LS- 77 Technical Features Troubleshooting Troubleshooting GuideSpecifications Specifications TableAppendix 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 Appendix D The AMR Active System AM-77 Control Center Edition CCESetting up the AMR Active System Line Level ConnectionSpeaker Connection Scenario Testing and Troubleshooting the AMR Active System AMR Active System Configuration Diagram LS-77 Speaker LAppendix E LS-77 in OptiArray configurations Introducing AMRs OptiArray scalable acoustic systemPage AMR recommends the following OptiArray Setups Epsilon/Zeta Iota/Zappa Omicron/Sigma Epsilon/Zeta System wiring Appendix G Acoustics Background In formation AcousticsGood acoustics Reverberation timePage Diffusers Absorption or Diffusion ?Absorbers Membrane absorbersStanding Waves Porous absorbersRoom modes
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