Abbingdon Music Research LS-77 owner manual Speaker R Speaker L

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LS-77	LS-77
Speaker R	Speaker L

		LS-77 Professional Monitor
		Designed and Engineered in Great Britain
Sensitivity:	87dB
Impedance:	8Ohms
Cont. Power Handing:	150W
Peak Prog. Handing:	600W
Frequency Response:	27Hz-40kHz	High Frequency

Level Adjustment

HF

LF

INOUT

		LS-77 Professional Monitor
		Designed and Engineered in Great Britain
Sensitivity:	87dB
Impedance:	8Ohms
Cont. Power Handing:	150W
Peak Prog. Handing:	600W
Frequency Response:	27Hz-40kHz	High Frequency

Level Adjustment

HF

LF

INOUT

Speaker Cable

Interconnect Cable

Stereo Amplifier

Speaker Cable

Interconnect Cable

R	L
Pre-amplifier	Pre-amplifier

Figure 3.1 - System connection using Speakon connector equipped speaker cables

i.Connect the respective Speakon® connectors of the speaker cables to the LS-77 (left & right).

ii.Connect the respective Speakon® connectors of the speaker cables to your amplifier.

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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 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 the loudspeakers Distance to back and side wallsLevelling/Speaker Support Loudspeaker Toe-in Room and furniture influenceCare and maintenance Care & MaintainanceRunning-in the loudspeakers 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