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Radio Shack 12-1976, Owner'S Manual

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Radio Shack 12-1976 Owner'S Manual Download Page 9

9

If your autosound system has only two phono output jacks

 

(left and right)

and you are using four speakers, 

first connect the single phono plug end of

a Y-adapter shielded audio cable to each autosound system output jack.
Then:

• Connect the other two ends of the left Y-adapter to the amplifier’s corre-

sponding 

FRONT L 

and 

REAR L

 phono jacks

• Connect the other two ends of the right Y-adapter to the amplifier’s corre-

sponding 

FRONT R 

and 

REAR R

 phono jacks

12-1976.fm  Page 9  Tuesday, July 13, 1999  10:01 AM

Summary of Contents for 12-1976

Page 1: ...Cat No 12 1976 OWNER S MANUAL Please read before using this equipment 4 25 Watt Trunk Mount Amplifier 4 Channel 100 Watt 12 1976 fm Page 1 Tuesday July 13 1999 10 01 AM...

Page 2: ...ch your autosound system s output for the best high fi delity performance 14k Gold Plated Speaker Termi nals designed for low impedance high conductivity and minimum cor rosion to provide the highest...

Page 3: ...Connections 10 Connecting the Speakers 13 Preparing the Speaker Wires 13 Connecting Four Speakers 14 Connecting Two Speakers 15 Testing the Connections 16 Mounting the Amplifier 16 Operation 18 Turni...

Page 4: ...e instructions in this owner s manual You should be able to answer all of these questions about your vehicle s electrical and sound systems Does my vehicle have a 12 volt negative ground system If it...

Page 5: ...mount the amplifier see Testing the Power Connections Be sure your speakers can handle 25 watts per channel if you connect the autosound system to two pairs of speakers or 50 watts per channel if you...

Page 6: ...nition switch to on or to ACC and turns off the amplifier when you turn off the ignition 4 Connect the black wire s spade connector to the amplifier s GND terminal 5 Securely connect the black wire s...

Page 7: ...bles such as Cat No 42 2368 not supplied If your autosound system has only two phono outputs you will also need two shielded Y adapter cables such as Cat No 42 2435 not supplied 1 Temporarily place th...

Page 8: ...peakers front or rear connect only the corresponding autosound sys tem s output jacks to the amplifier using audio cables as follows front left to FRONT L and front right to FRONT R or rear left to RE...

Page 9: ...Y adapter shielded audio cable to each autosound system output jack Then Connect the other two ends of the left Y adapter to the amplifier s corre sponding FRONT L and REAR L phono jacks Connect the...

Page 10: ...rresponding FRONT L and FRONT R or REAR L and REAR R phono jacks High Level Input Connections If your stereo system has only speaker outputs you can connect them to the am plifier s rear HIGH INPUT an...

Page 11: ...11 If your autosound system has four speaker outputs and you are going to use four speakers Floating Ground Connection Common Ground Connection 12 1976 fm Page 11 Tuesday July 13 1999 10 01 AM...

Page 12: ...12 If your autosound system has only two speaker outputs and you are going to use four speakers Floating Ground Connection Common Ground Connection 12 1976 fm Page 12 Tuesday July 13 1999 10 01 AM...

Page 13: ...t the speakers negative terminal wires to chassis ground Note Speaker wires have two conductors Color coded wires have a stripe run ning down one of the conductors or different colored insulation for...

Page 14: ...erminal 3 Repeat Steps 1 and 2 to connect a speaker wire to the amplifier s FR front right terminals 4 Repeat Steps 1 3 to connect speaker wires to the amplifier s RL rear left and RR rear right termi...

Page 15: ...the end of the speaker wire s unmarked conductor to the ampli fier s FL front left negative or RL rear left negative terminal 3 Repeat Steps 1 and 2 to connect a speaker wire to the amplifier s FR and...

Page 16: ...tions If you verify that all components operate properly mark the connections to insure easy identification of each wire then follow the instructions under Mounting the Amplifier MOUNTING THE AMPLIFIE...

Page 17: ...h holes in the marked locations being careful not to damage anything behind the mounting surface 5 Attach the amplifier to the mounting surface using the supplied sheet metal screws and washers 6 Reco...

Page 18: ...ions The sound distorts if any output channel shorts Turn off the amplifier and try to locate the short To prevent draining the vehicle s battery do not play the amplifier for too long using the ignit...

Page 19: ...ckwise until you can hear the sound at a comfortable level 4 Turn up the volume on your autosound system until the sound begins to dis tort Then immediately turn down the volume to the point just belo...

Page 20: ...nd dirt which can cause premature wear of parts Wipe the amplifier with a damp cloth occasionally to keep it looking new Do not use harsh chemicals cleaning solvents or strong detergents to clean the...

Page 21: ...fore you turn it on again Turn off your autosound system then disconnect your vehicle battery s negative terminal Replacing the Tube Type Fuse 1 Grasp the two ends of the power wire s fuse holder and...

Page 22: ...150 mV High Input 2 5 V Power Supply Voltage DC 14 4V Negative Ground 10 5 16V Maximum Current Draw 10A Matching Speaker Impedance 4 Ohms or Greater Fuse Requirement 10 A Dimensions 21 4 71 4 81 4 Inc...

Page 23: ...23 NOTES 12 1976 fm Page 23 Tuesday July 13 1999 10 01 AM...

Page 24: ...t cover transportation costs Nor does it cover a product subjected to misuse accidental damage alteration or improper installation EXCEPT AS PROVIDED HEREIN RADIO SHACK MAKES NO EXPRESS WARRAN TIES AN...

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