Abbingdon Music Research LS-77 owner manual Contents

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Contents

WARNINGS

Section 1 - Unpacking

Section 2 - Component Overview

Section 3 - Setup

3.1Connecting the loudspeakers

3.2.Connecting the amplifier

3.3Multi-channel set up

3.4Choice of loudspeaker cable

Section 4 - Positioning

4.1Symmetry and room modes

4.2Distance between the loudspeakers

4.3Distance to the loudspeakers

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		4.4 Distance to back and side walls	17
	7	4.5 Levelling/Speaker Support	18
		4.6 Loudspeaker Toe-In	19
	9	4.7 Room and furniture influence	19
	9	Section 5 - Care & Maintainance	20
		Section 5 - Care & Maintainance	20
	11	5.1 Care and maintenance	20
	11	5.2 Running-in the loudspeakers	20
	11	5.3 Power rating	21
	15	5.3 Power rating	21
	15	Section 6 - LS- 77 Technical Features	22
	15	Section 6 - LS- 77 Technical Features	22
	16	Section 7 - Troubleshooting	23
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	16	Section 8 - Specifications	24
	17	Section 8 - Specifications	24
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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 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 back and side walls Distance to the loudspeakersLevelling/Speaker Support Room and furniture influence Loudspeaker Toe-inRunning-in the loudspeakers Care and maintenanceCare & Maintainance 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 Acoustics Appendix G Acoustics Background In formationGood acoustics Reverberation timePage Absorption or Diffusion ? DiffusersAbsorbers Membrane absorbersPorous absorbers Standing WavesRoom modes