Abbingdon Music Research LS-77 owner manual Using Binding Posts

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Warning: ensure

no speaker connector is in contact with the speaker enclosure to cause a short- circuit!

3.1.2 Using Binding Posts

When not using AMR's or another manufacturer’s Speakon® equipped loudspeaker cables, you need to use a conventional two or four pole speaker cable. Please consult your authorised AMR retailer for recommendations.

Connect a suitable loudspeaker cable to the speaker binding posts, located at rear of the LS-77.

When using two-pole speaker cables, the cable should be connected to the upper pair of binding posts and the included short Bi-Wire Jumper Cables must be connected between the upper and lower binding post of the same colour marking. When using four-pole speaker cables usually two of these poles will be dedicated to carrying the high frequency signal, connect these to the upper pair of binding posts. The low frequency poles are connected to the lower binding posts. In all cases observe the polarity, usually marked by black and red markers on the cable and match these markers with the colour coding of the binding posts.

The LS-77 high quality binding posts can accommodate different connection systems:

6 mm pins: The pins can be placed directly into the binding post without any screwing necessary.

Cable spades: Un-tighten the binding posts, insert the spades into the openings, and secure the spades into the posts by tightening the posts. Tighten the posts, and check the contacts after a few days to make sure that they have not loosened.

Bare wires: Un-tighten the binding posts and place the cable into the binding posts. Tighten the posts. With bare wire terminations, make sure that no thin metal strand of wire is in contact with another strand of wire. Tighten the posts, and check the contacts after a few days to make sure that they have not loosened.

With every connection system, it is important to ensure that the contact is tight and has a proper contact area. Connectors with similar gold plating as the LS-77 Reference Class Professional Monitor binding posts will typically offer the best results while also remaining corrosion-free.

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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 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 back and side walls Distance to the loudspeakersLevelling/Speaker Support Room and furniture influence Loudspeaker Toe-inCare & Maintainance Care and maintenanceRunning-in the loudspeakers 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