Boulder Amplifiers 860 manual Polarity, Connecting Your Loudspeakers

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POLARITY

Please note that the 860 Stereo Power Amplifier conforms to the standard of Pin 2 as the high or ”hot” for the balanced inputs.

The polarity of the 860 Stereo Power Amplifier is such that a positive- going transition at Pin 2 will produce a positive-going transition at the “+” output terminal.

CONNECTING YOUR LOUDSPEAKERS

Do not use any wrenches on the loudspeaker binding posts! Tighten these connectors only by hand.

WARNING: This is a high power amplifier! When driven, there is a high voltage potential at the terminals.

Connections should only be made with the AC mains disconnected!

Select spade terminals which accept 6 mm or .250 inch diameter binding posts.

There is no provision for the use of banana plugs. These plugs have been proven to come loose over time which increases contact resistance and distortion. For the same reason we also do NOT recommend the use of banana plugs at the loudspeaker end.

1-5

GETTING

STARTED

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Contents Page Boulder Watt Stereo Power Amplifier Boulder 860 Stereo Power Amplifier Rear Panel Table of Contents Appendix Placement of the 860 Stereo Power Amplifier Getting StartedConnecting to the Mains Outlet Connecting a Balanced Source Connecting AN Unbalanced Source Connecting Your Loudspeakers PolarityPowering UP OperationClip Detection Shorted Output Detection MaintenanceThermal Protection Remote Control Operation Volt TriggerConnecting Boulderlink BoulderlinkSetting Boulderlink Switches Setting Boulderlink ID NumbersPower UP VIA Boulderlink Boulderlink Messages Boulder 860 Stereo Power Amplifier Specifications Troubleshooting Symptom Cause Remedy Appendix