Related Manuals for Radio Shack Trunk Mount
Summary of Contents for Radio Shack Trunk Mount
- Page 1 12-1976.fm Page 1 Tuesday, July 13, 1999 10:01 AM Cat. No. 12-1976 OWNER’S MANUAL Please read before using this equipment. 25 Watt Trunk Mount Amplifier 4-Channel 100-Watt...
- Page 2 © 1995 Tandy Corporation. Optimus and Radio Shack are registered trademarks used by Tandy Corporation. Input Level Control the level (high or low) of the audio signals that enter the amplifier.
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Page 3: Table Of Contents
12-1976.fm Page 3 Tuesday, July 13, 1999 10:01 AM CONTENTS Preparation ... 4 Choosing a Mounting Location ... 4 Before You Begin the Installation ... 4 Connecting Ground and Primary/Switched Power ... 5 Connecting Your Autosound System ... 7 Low Level Input Connections ... 7 High-level Input Connections ... -
Page 4: Preparation
• Do not cut any of the amplifier’s wires. If you cut any wire, you cannot obtain a refund or exchange on this product. Radio Shack will provide warranty service if you cut a wire and find the product is defective. -
Page 5: Connecting Ground And Primary/Switched Power
(or 50 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. - Page 6 12-1976.fm Page 6 Tuesday, July 13, 1999 10:01 AM Note: After you complete the connections and reconnect the battery wire, you will need to reset all clock/timer/memory devices in your vehicle. 2. Connect the supplied dark blue/white wire’s end to the amplifier’s (remote power) terminal.
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Page 7: Connecting Your Autosound System
12-1976.fm Page 7 Tuesday, July 13, 1999 10:01 AM CONNECTING YOUR AUTOSOUND SYSTEM Low Level Input Connections You can connect your autosound system’s low-level phono output jacks to the amplifier’s phono jacks. LOW INPUT Note: For a cleaner, less noisy signal transfer between your autosound system and the amplifier, the amplifier’s For the best results, use shielded audio cables, such as Cat. - Page 8 12-1976.fm Page 8 Tuesday, July 13, 1999 10:01 AM If your autosound system has four phono outputs but you are using only two speakers (front or rear) , connect only the corresponding autosound sys- tem’s output jacks to the amplifier using audio cables as follows: •...
- Page 9 12-1976.fm Page 9 Tuesday, July 13, 1999 10:01 AM 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: •...
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Page 10: High-Level Input Connections
12-1976.fm Page 10 Tuesday, July 13, 1999 10:01 AM If your autosound system has only two phono output jacks (left and right) and you are using only two speakers, simply connect them to the amplifier’s corresponding FRONT L High-Level Input Connections If your stereo system has only speaker outputs, you can connect them to the am- plifier’s rear and front... - Page 11 12-1976.fm Page 11 Tuesday, July 13, 1999 10:01 AM If your autosound system has four speaker outputs and you are going to use four speakers: Floating Ground Connection Common Ground Connection...
- Page 12 12-1976.fm Page 12 Tuesday, July 13, 1999 10:01 AM If your autosound system has only two speaker outputs and you are going to use four speakers: Floating Ground Connection Common Ground Connection...
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Page 13: Connecting The Speakers
Note: Speaker wires have two conductors. Color-coded wires have a stripe run- ning down one of the conductors or different colored insulation for each conduc- tor. Your local Radio Shack store has a wide selection of speaker wire to choose from. -
Page 14: Connecting Four Speakers
12-1976.fm Page 14 Tuesday, July 13, 1999 10:01 AM Connecting Four Speakers 1. Connect one end of a speaker wire’s marked conductor to the amplifier’s (front-left positive) terminal. 2. Connect one end of the speaker wire’s unmarked conductor to the ampli- fier’s (front-left negative) terminal. -
Page 15: Connecting Two Speakers
12-1976.fm Page 15 Tuesday, July 13, 1999 10:01 AM Connecting Two Speakers If you are connecting only two speakers, you can connect them to the amplifier’s front ( ) or rear ( 1. Connect one end of a speaker wire’s marked conductor to the amplifier’s (front-left positive) or 2. -
Page 16: Testing The Connections
12-1976.fm Page 16 Tuesday, July 13, 1999 10:01 AM TESTING THE CONNECTIONS Before you permanently mount the amplifier, temporarily reconnect your vehicle battery’s negative ( ) cable, turn your vehicle’s ignition to ON or ACC, then test the connections. The amplifier is properly connected to the autosound system and speakers if you can verify that the amplifier and the autosound system turn on properly and the speakers’... - Page 17 12-1976.fm Page 17 Tuesday, July 13, 1999 10:01 AM 3. Using the mounting holes on the amplifier as a guide, mark the locations for the mounting holes. 4. Drill -inch holes in the marked locations, being careful not to damage anything behind the mounting surface.
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Page 18: Operation
12-1976.fm Page 18 Tuesday, July 13, 1999 10:01 AM OPERATION TURNING ON THE AMPLIFIER The amplifier automatically turns on whenever you turn on your autosound sys- tem. POWER lights when the amplifier is operating. SETTING THE LEVEL CONTROL For the best performance, you can adjust the level of the audio signals that enter the amplifier by following these steps. - Page 19 12-1976.fm Page 19 Tuesday, July 13, 1999 10:01 AM 2. Temporarily turn up the autosound system’s volume control to about one- third of its full range. Caution: Never turn the level controls up any farther than you need to get clear sound at two thirds volume maximum.
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Page 20: Maintenance
Modifying or tampering with the amplifier’s internal components can cause a malfunction and invalidate your amplifier’s warranty. If your amplifier is not per- forming as it should, take it to your local Radio Shack store for assistance. -
Page 21: Replacing The Fuses
12-1976.fm Page 21 Tuesday, July 13, 1999 10:01 AM REPLACING THE FUSES If the amplifier shuts down, you might need to replace the power wire’s 10-amp tube-type fuse (such as Cat. No. 270-1072, not supplied), the 10-amp blade-type fuse (such as Cat. No. 270-1081, not supplied) on the back panel, or both fuses. Cautions: •... -
Page 22: Specifications
12-1976.fm Page 22 Tuesday, July 13, 1999 10:01 AM SPECIFICATIONS Output Power @ 14.4 VDC 1 kHz 10% THD Front ...25W Rear ...25W Frequency Response ... 20–20,000 Hz (±3 dB) Input Impedance Low Input ... 10 kOhms High Input ...100 Ohms Input Sensitivity (for 10% THD Output Power) Low Input ... - Page 23 12-1976.fm Page 23 Tuesday, July 13, 1999 10:01 AM NOTES...
- Page 24 Within this period, we will repair it without charge for parts and labor. Simply bring your Radio Shack sales slip as proof of purchase date to any Radio Shack store. Warranty does not cover transportation costs. Nor does it cover a product subjected to misuse, accidental damage, alteration or improper installation.