Radio Shack 85 owner manual Connecting Ground and PRIMARY/SWITCHED Power

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12-1977.fm Page 6 Tuesday, July 13, 1999 10:07 AM

Cautions:

•To prevent damage to your amplifier or autosound system, you must first connect the ground, primary, and switched power wires (as described in “Connecting Ground and Primary/Switched Power”) before you connect the speakers to the amplifier. Make the connections only in the order shown. Damage to the amplifier is possible if you connect any wire incorrectly.

•Turn on the power to test the connections before you permanently mount the amplifier (see “Testing the Power Connections”).

•Be sure your speakers can handle 85 watts per channel, if you connect the autosound system to two pairs of speakers (or 170 watts per channel if you connect the autosound system to only one pair of speakers). Each speaker must have an impedance of at least 4 ohms. Your local Radio Shack store carries a full line of speakers to choose from.

CONNECTING GROUND AND PRIMARY/SWITCHED POWER

1.To prevent damage to your amplifier or autosound system while making the connections, disconnect the negative (–) cable from your vehicle’s battery.

Note: After you complete the connections and reconnect the battery wire, you will need to reset all clock/timer/memory devices in your vehicle.

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Contents 85 × 4 High Power 4-Channel Trunk Mount Amplifier Features Automatic Thermal Protection Mute Turn On Circuit eliminates Contents Before YOU Begin the Installation PreparationChoosing a Mounting Location Connecting Ground and PRIMARY/SWITCHED Power Illus please add a dwg that illustrates step Connecting to Your Autosound System Low Level Input ConnectionsFm Page 9 Tuesday, July 13, 1999 1007 AM Fm Page 10 Tuesday, July 13, 1999 1007 AM High-Level Input Connections Floating Ground Connection Common Fm Page 13 Tuesday, July 13, 1999 1007 AM Connecting the Speakers Preparing the Speaker WiresConnecting Four Speakers Connecting Two Speakers Unbridged Connection Connecting Two Speakers Bridged Connection Fm Page 18 Tuesday, July 13, 1999 1007 AM Connecting Two Unbridged Speakers and One Bridged Subwoofer Testing the Connections Mounting the Amplifier Fm Page 22 Tuesday, July 13, 1999 1007 AM Setting the Level Control OperationTurning on the Amplifier Using the Frequency Crossover Over Freq On/Off SwitchOver Freq Control Maintenance Replacing the Fuses Replacing the Tube-Type FuseReplacing a Blade-Type Fuse Specifications Radio Shack
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