Abbingdon Music Research LS-77 owner manual AMR recommends the following OptiArray Setups

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AMR recommends the following OptiArray Setups:

Room Size	≤35m2	25m2–70m2	50m2-140m2	100m2-280m2	200m2-480m2
System	Alpha	Epsilon	Iota	Omicron	Upsilon
	(passive)	(passive)	(passive)	(passive)	(passive)
AM-77	1	1	2	4	8
LS-77 (pairs)	1	2*	4*	8*	16*
Power	360W	360W	720W	1440W	2880W
SPL (3m)	109dB	112dB	118dB	124dB	130dB
System	Beta	Zeta	Kappa	Sigma	Omega
	(active)	(active)	(active)	(active)	(active)
CCE	1	1	1	2	4
AM-77	1	1	2	4	8
LS-77 (pairs)	1	2*	4*	8*	16*
Power	560W	560W	1120W	2240W	4480W
SPL (3m)	113dB	116dB	122dB	128dB	134dB

*: OptiArray configuration

The Alpha system using a single pair of LS-77s with a total system power capacity of 360W, can sustain 109db SPL at 3m listening distance for the complete system and is thus appropriate for moderate city appartments and condominiums. From this AMR’s OptiArray® configurations extend to the awesome Omega system providing a configuration suited to any size dwelling and listening room. This Omega system consists of 16 pairs of LS-77s in OptiArray® configuration, with a total system power capacity of over 4480W. The Omega system can sustain 134dB SPL at 3m listening distance for the complete system, which is more than many Concert Sound Reinforcement Systems.

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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