Radio Shack 85 owner manual Mute Turn On Circuit eliminates

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12-1977.fm Page 3 Tuesday, July 13, 1999 10:07 AM

Mute Turn On Circuit - eliminates

the irritating thump noise that some amplifiers produce when you turn them on.

Power Indicator - lights when power is on.

Full MOSFET Power Supply - pro- duces enough power to supply the main amplifier and has a consider- able amount of reserve power for peak “high demand” situations.

Short Circuit Protection - distorts

sound if any output channel shorts so you can know to turn off the amplifier.

Important: Be sure your speakers can handle 340 watts of power (170 watts per channel if you connect the autosound system to one pair of speakers, or 85 watts per channel if you connect the autosound system to two pairs of speakers). Each speaker must have an impedance of at least 4 ohms. Your local Radio Shack store carries a full line of speakers.

Note: If the connectors on your vehi- cle stereo system are not compatible with the amplifier’s connectors, your local Radio Shack store sells adapter harnesses for many vehicles.

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Contents 85 × 4 High Power 4-Channel Trunk Mount Amplifier Automatic Thermal Protection FeaturesMute 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 Low Level Input Connections Connecting to Your Autosound SystemFm 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 Preparing the Speaker Wires Connecting the SpeakersConnecting 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