Lowrance Link-8 DSC VHF Link-8 VHF Installation Manual EN - Page 14
Hailer Horn, Wire color, Function, Details, Important, External speaker, 7 DC Power, Ground
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4 Hailer Horn Wire color White Shield Function (+) (-) Shield Details Connect to hailer speaker + Connect to hailer speaker - Important: Do not short these 2 wires. Install the hailer horn in a forward-facing location on the boat because the hailer horn will transmit the FOG horn sounds and will 'listen back' when not transmitting. Note: We recommend you use a hailer horn of 4 Ohms to obtain maximum 30 W audio output power. 5 External speaker You can connect 1 x 2 W 8Ω or 1 x 4 W 4Ω speaker to the 3.5 mm speaker connector. A speaker cable with 3.5 mm plug is provided to make the connection to the speaker. Wire color White Black Function Speaker (+) Speaker (-) Details Connect this wire to the positive terminal of the speaker. Connect this wire to the negative terminal of the speaker. 6, 7 DC Power Wire color 6 - Red 7 - Black Function (+) 13.6 V DC (-) Ground Details Connect this wire to the positive battery terminal. Use at least a 10 A fused 13.6 V DC electrical service to the radio. Connect this wire to the battery negative terminal. 8 Ground The vessels battery negative must be common to the boat's seawater Ground. (Optional) You can connect the base station to the boat's seawater Ground. Use the Ground screw and Ground plain washer supplied to make this connection. 14 Lowrance - Link-8 Installation Instructions