Abbingdon Music Research LS-77 owner manual Contact with the chassis

Page 10

Figure 2.2 - LS-77 Rear Panel

R1

LS-77 Professional		Monitor
Designed and	Engineered
		in Great Britain

R1. TRANSMISSIONLINE PORT: to reproduce the lowest frequencies.

R2. HIGH FREQUENCY LEVEL ADJUSTMENT cover: to cover the replaceable resistors in the high frequency level adjustment circuit.

R3. SPADE/BANANA high frequency inputs: for connection of standard termination speaker cables.

R4. SPADE/BANANA low frequency inputs: for connection of standard termination speaker cables.

Warning:

ensure no speaker con- nector is in

Sensitivity:
Impedance:
Cont.	Power Handing:
Peak	Prog.	Handing:
Frequency		Response:

87dB 8Ohms 150W

600W 27Hz-40kHz

High Frequency

Level Adjustment

HF

LF

Frequency

(Hz)

R2

R3

R5. SPEAKON® low & high frequency outputs: for connection of Speakon terminated speaker cables.

R6. SPEAKON® low & high frequency inputs: for connection of Speakon terminated speaker cables.

contact with the chassis

R4

OUT	R5
IN

R6

10

Image 10

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 Connecting the loudspeakers SetupUsing AMRs OptiLink Speakon Cable Speaker R Speaker L Using Binding Posts Speaker Cable Stereo Amplifier Interconnect Cable Multi-channel set up Connecting the amplifierChoice of loudspeaker cable Symmetry and room modes PositioningDistance between the loudspeakers Distance to the loudspeakers Distance to back and side wallsLevelling/Speaker Support Loudspeaker Toe-in Room and furniture influenceCare & Maintainance Care and maintenanceRunning-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 Good acoustics Appendix G Acoustics Background In formationAcoustics Reverberation timePage Absorbers DiffusersAbsorption or Diffusion ? Membrane absorbersStanding Waves Porous absorbersRoom modes