Abbingdon Music Research LS-77 owner manual Speaker Connection

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Scenario 2:

AM-77 CCE x 1

AM-77 x 2 (each AM-77 must be in Monoblock Power Amplifier Mode)

(see page 46 of AM-77 Manual). Option cable Left channel RCA (Blue) Option cable Right channel RCA (Red)

ÆLeft AM-77 Input 1 Left Channel

ÆRight AM-77 Input 1 Left Channel

Attach the power cables to the amplifiers, however do not connect the power cables to the mains yet nor should the amplifiers be switched on.

Route the mains cables so that they run cleanly and without sharp bends towards the power extension strip and then attach the mains cables.

Speaker Connection

Scenario 1:

AM-77 CCE x 1

AM-77 x 1 (the AM-77 must be in Stereo Power Amplifier Mode)

Left speaker cable connector marked "HF/CCE" Æ Right speaker cable connector marked "HF/CCE" Æ Left speaker cable connector marked “LF/AM” Æ Right speaker cable connector marked “LF/AM” Æ

AM-77 CCE 's Left Channel Speakon socket AM-77 CCE 's Right Channel Speakon socket AM-77's Left channel Speakon socket AM-77's Right channel Speakon socket

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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 Good acoustics Appendix G Acoustics Background In formationAcoustics Reverberation timePage Absorbers DiffusersAbsorption or Diffusion ? Membrane absorbersStanding Waves Porous absorbersRoom modes