2-2018.fm Page 1 Friday, May 12, 2000 12:46 PM Please read before using this equipment.
12-2018.fm Page 2 Friday, May 12, 2000 12:46 PM ˆ Contents Features .................................................................................................................................. 3 Preparation ............................................................................................................................. Supplied Hardware ............................................................................................................ Choosing a Mounting Location ................
12-2018.fm Page 3 Friday, May 12, 2000 12:46 PM ˆ Features Your RadioShack High Power 4/3/2-Channel Bridgeable Amplifier produces a total of 400 watts to give added punch and power to your vehicle’s existing auto sound system. The amplifier produces up to 200 watts per channel (if bridged) of clean, powerful sound at all audio frequencies with minimum distortion. You can connect your auto sound system’s low-level or speaker-level outputs to this amplifier.
12-2018.fm Page 4 Friday, May 12, 2000 12:46 PM ˆ Preparation SUPPLIED HARDWARE Your amplifier comes with the following items. Be sure you locate everything shown before you store or dispose of the packing materials.
12-2018.fm Page 5 Friday, May 12, 2000 12:46 PM Warning: The amplifier gets very hot while it is on. Do not touch the amplifier or place flammable objects near it. Preparing the Mounting Area Before you mount the amplifier, make sure you have these materials. • an adapter harness Then test the connections. When you verify that everything works as expected, disconnect the amplifier, mount it in your vehicle, and reconnect it.
12-2018.fm Page 6 Friday, May 12, 2000 12:46 PM Cautions: 100 watts per channel if you connect your auto sound system to two pairs of speakers or one pair of speakers and a subwoofer). Each speaker must have an impedance of at least 4 ohms. Your local RadioShack store carries a full line of speakers. • For added safety and to protect your amplifier and auto sound system, disconnect the cable from your vehicle’s negative (–) battery terminal before you begin.
12-2018.fm Page 7 Friday, May 12, 2000 12:46 PM This connection turns on the amplifier when you turn on the auto sound system, and turns off the amplifier when you turn off the auto sound system. This prevents your vehicle’s battery from being drained if you leave your amplifier on when you turn off your auto sound system.
12-2018.fm Page 8 Friday, May 12, 2000 12:46 PM ˆ Connecting Inputs LOW-LEVEL INPUTS (Speaker Wire) Inputs” on Page 9 to connect your amplifier. You can connect your auto sound system’s low-level line out jacks to the amplifier’s lowlevel line in jacks. Note: For the best results, use shielded audio cables (not supplied) available at your local RadioShack store. If your auto sound system does not have low-level line out jacks, see “High-Level 1.
12-2018.fm Page 9 Friday, May 12, 2000 12:46 PM CH 2 CH 1 CH 4 CH 3 If your auto sound system has two line out jacks (left and right), connect the auto sound system to the amplifier. Left Right Auto Sound System Note: For the best results, use shielded audio Y-adapters (not supplied) available at your local RadioShack store. HIGH-LEVEL (SPEAKER WIRE) INPUTS using either a floating or common ground connection.
Auto Sound System Connecting Inputs White Gray/Black Left Front + Speaker Left Front – Speaker White Gray Green Violet Gray/Black Left Front + Speaker Green/Black Right Front– Speaker Right Front + Speaker Left Rear + Speaker Left Rear – Speaker Right Rear– Speaker Right Rear + Speaker Green/Black Common Gray Violet/Black Right Front + Speaker Green Violet Violet/Black Left Rear + Speaker Common Right Rear + Speaker 12-2018.
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-2018.fm Page 12 Friday, May 12, 2000 12:46 PM CONNECTING SPEAKERS You can connect four speakers, two speakers and a subwoofer, or just two speakers to the amplifier and your auto sound system. 3. Strip the insulation from the ends of each conductor to expose 1/4 inch of wire. Twist the ends to secure loose strands. Important: Before you make the connections, make sure both BRG/ST switches (on the left and right sides of the amplifier) are set to ST.
12-2018.fm Page 13 Friday, May 12, 2000 12:46 PM Connecting Four Speakers CH1 Front Left Speaker CH2 Front Right Speaker CH3 Rear Left Speaker 1. Use a screwdriver to connect the front left speaker’s positive (+) wire to the amplifier’s CH1 (+) terminal. 2. Use a screwdriver to connect the front left speaker’s negative (–) wire to the amplifier’s CH1 (–) terminal. CH4 Rear Right Speaker (–) wires to the amplifier’s CH2 (+) and CH2 (–) terminals. 4.
12-2018.fm Page 14 Friday, May 12, 2000 12:46 PM Connecting Two Speakers (Bridged Connection) Left Speaker Caution: This connection produces 200 watts per channel. Use this connection only if you have high-power speakers that can handle a power output of 200 watts. Note: CH2 (+) and CH4 (+) are used as negative (–) terminals for a bridged connection. 1. Use a screwdriver to connect the left speaker’s positive (+) wire to the amplifier’s CH1 (+) terminal. Right Speaker 2.
12-2018.fm Page 15 Friday, May 12, 2000 12:46 PM 4. Use a screwdriver to connect the subwoofer’s positive (+) wire to the amplifier’s CH3 (+) or CH4 (+) terminal. 5. Repeat Step 4 to connect the subwoofer’s negative (–) wire to the amplifier’s negative (–) terminal for the same channel you connected in Step 4. For example, if you connected the subwoofer’s positive (+) wire to the amplifier’s CH3 (+) terminal, connect the subwoofer’s negative (–) wire to the amplifier’s CH3 (–) terminal.
12-2018.fm Page 16 Friday, May 12, 2000 12:46 PM ˆ Completing the Installation TESTING THE CONNECTIONS and auto sound system operate properly. The amplifier turns on after a few seconds. Before you continue, make sure you have securely made all connections. Then reconnect the cable to the vehicle’s negative (–) battery terminal.
12-2018.fm Page 17 Friday, May 12, 2000 12:46 PM 5. Secure the amplifier to the mounting surface using the supplied sheet metal screws and washers. 6. Reconnect the wiring. 7. Reconnect the cable to the vehicle battery’s negative (–) terminal. 8. Reset your vehicle’s clock, your auto sound system’s tuner memory, and other timer/memory devices.
12-2018.fm Page 18 Friday, May 12, 2000 12:46 PM ˆ Operation TURNING ON THE AMPLIFIER 1. Use a screwdriver to turn LEVEL (MIN/ MAX) on the left and right sides of the amplifier fully counterclockwise to MIN. The amplifier automatically turns on a few seconds after you turn your vehicle’s ignition switch to ACC or ON or turn on your auto sound system, depending on how you wired the system. The POWER indicator on the side of the amplifier lights when the amplifier is on. 2.
12-2018.fm Page 19 Friday, May 12, 2000 12:46 PM ADJUSTING FREQUENCY CROSSOVER If you installed a subwoofer using the steps in “Connecting Two Speakers and One Subwoofer (Unbridged Connection)” on Page 14 or “Connecting Two Unbridged Speakers and One Bridged Subwoofer” on Page 15, set X-OVER FREQ ON/OFF to ON, then adjust X-OVER FREQ for your vehicle’s acoustics. The amplifier passes through all frequencies at or below that setting (45−400 Hz).
12-2018.fm Page 20 Friday, May 12, 2000 12:46 PM ˆ Troubleshooting We do not expect you to have any problems with your RadioShack High Power 4/3/2-Channel Bridgeable Amplifier, but if you do have a problem, this chart might help. If not, take the amplifier to your local RadioShack store for assistance. Symptom No power — the amplifier’s POWER indicator does not light after the vehicle’s auto sound system is turned on No sound Possible Cause Suggestion Power problem.
12-2018.fm Page 21 Friday, May 12, 2000 12:46 PM Symptom Distorted sound (continued) Possible Cause The amplifier might have shut down. CARE Suggestion Turn your auto sound system off and let the amplifier cool. Make sure the amplifier is properly ventilated. Then turn your auto sound system back on. The amplifier turns itself back on when it is cooled. Caution: Do not use a fuse with ratings other than those specified. Doing so might damage your amplifier.
12-2018.fm Page 22 Friday, May 12, 2000 12:46 PM 2. For each fuse, grasp its plastic end and pull it out of the back of the amplifier. 3. If the fuse is blown, replace it. Use only a blade-type fuse with the proper rating. The fuse must be 30 amps. 4. Grasp the fuse’s plastic end and push it in. 5. Reconnect the cable to the vehicle’s negative (–) battery terminal.
12-2018.fm Page 23 Friday, May 12, 2000 12:46 PM ˆ Specifications Output Power: Stereo ....................................................................... 65 Watts × 4 @ 4 Ohms, 20–20 kHz, 0.5% THD 100 Watts × 4 @ 4 Ohms, 20–20 kHz, 10% THD 75 Watts × 4 @ 2 Ohms, 20–20 kHz, 0.5% THD 80 Watts × 4 @ 2 Ohms, 20–20 kHz, 1% THD Bridged .................................................................................. 200 Watts @ 4 Ohms, 1 kHz, 10% THD Frequency Response .....................................
12-2018.fm Page 24 Friday, May 12, 2000 12:46 PM Limited One-Year Warranty This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for one (1) year from the date of purchase from RadioShack company-owned stores and authorized RadioShack franchisees and dealers.
