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Setting the Unit
If the sound level is too low, even when the volume of the car stereo used along with this power amplifier is turned up, turn gain control clockwise. If the sound distorts when the volume is turned up, turn the gain control counter-clockwise.
â¢ When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more, adjust level to match the car stereo output level. â¢ If you hear too much noise when using the speaker input terminals, turn the gain control counter-clockwise.
It is possible to input from a car stereo external output (subwoofer output) or a car stereo speaker output. When using an external output (subwoofer output), slide the switch to the left. For connection instructions, see the âConnection Diagramâ section. When using a speaker output, slide the switch to the right. In this case, it is necessary to use the supplied speaker input wire with RCA pin cord. For details, see the âUsing the Speaker Inputâ section.
Connecting the Unit
â¢ Make sure that wires will not interfere with moving parts of the vehicle, such as the gearshift, handbrake or seat sliding mechanism. â¢ Do not shorten any wires. Otherwise the protection circuit may fail to work when it should. â¢ Never feed power to other equipment by cutting the insulation of the power supply wire to tap from the wire. The current capacity of the wire will be exceeded, causing overheating. â¢ Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns. Grommet Fuse (30 A) Ground wire (black) [RD-223] (sold separately) Connect to metal body or chassis. External Output â¢ This diagram shows connections using external output (subwoofer output). Slide the input switch to the left. â¢ When you connect with speaker output, connections defers from the diagram. For details, see the âUsing the Speaker Inputâ section. In either case, you need to set the input switch. For details, see the âSetting the Unitâ section. Fuse (30 A) Special red battery wire [RD-223] (sold separately) After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery.
Connecting the Power Terminal
â¢ Always use the special red battery and ground wire [RD-223], which is sold separately. Connect the battery wire directly to the car battery positive terminal (+) and the ground wire to the car body.
â¢ Disconnect the negative (â) terminal of the battery to avoid the risk of short-circuit and damage to the unit. â¢ Secure the wiring with cable clamps or adhesive tape. To protect the wiring, wrap adhesive tape around it where they lie against metal parts. â¢ Do not route wires where they will get hot, for example where the heater will blow over them. If the insulation heats up, it may become damaged, resulting in a short-circuit through the vehicle body.
Failure to securely fasten the battery wire to the terminal using the terminal screws could cause the terminal area to overheat and could result in damage and injury including minor burns.
1. Pass the battery wire from the engine compartment to the interior of the vehicle.
â¢ After making all other connections to the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery. Engine Fuse (30 A) compart- Interior of ment the vehicle
Connecting the Speaker Output Terminals
1. Expose the end of the speaker wires using nippers or a cutter by about 10 mm (3/8 inch) and twist. 2. Attach lugs to speaker wire ends. Lugs not supplied.
â¢ Use pliers, etc., to crimp lugs to wires.
Before setting up the unit, unfasten the screws with a 4 mm or 5/32 inch hexagonal wrench (not supplied) and remove the terminal cover.
Power Indicator Cut Off Frequency Control
If the LPF/HPF select switch is set to LPF or HPF, you can select a cut off frequency from 40 Hz to 120 Hz. The power indicator lights when the power is switched on.
CAUTION: To prevent damage and/or injury
â¢ Do not ground the speaker wire directly or connect a negative (â) lead wire for several speakers. â¢ This unit is for vehicles with a 12-volt battery and negative grounding. Before installing it in a recreational vehicle, truck or bus, check the battery â¢ Speakers to be connected to the amplifier should conform with the standards listed below. If they do not conform, they may catch fire, emit smoke or become damaged. The speaker impedance must be 2 to 8 ohms for stereo connection, and 4 to 8 ohms for monaural and other bridge connection. â¢ Install and route the separately sold battery wire as far away as possible from the speaker wires. Install and route the separately sold battery wire, ground wire, speaker wires and the amplifier as far away as possible from the antenna, antenna cable and tuner. â¢ Cords for this product and those for other products may be different colors even if they have the same function. When connecting this product to another product, refer to the supplied Installation manuals of both products and connect cords that have the same function. Bass Boost Remote Control Bass Boost Remote Control Wire Car stereo with RCA output jacks
Fuse (30 A) Drill a 14 mm Positive terminal (1/2 inch) hole into the vehicle Insert the O-ring rubber grommet into the vehicle body. body.
3. Connect the speaker wires to the speaker output terminals.
â¢ Fix the speaker wires securely with the terminal screws. Terminal screw
BFC (Beat Frequency Control) Switch
BFC switch is on the bottom of the unit. If you hear a beat while listening to an AM broadcast with your car stereo, change the BFC switch using a small standard tip screwdriver.
Bass Boost Control
You can select a bass boost level from 0, 6, 9 and 12 dB. For instruction of connecting the bass boost remote control to the amplifier, see the âConnection Diagramâ section.
voltage. â¢ If the car stereo is kept on for a long time while the engine is at rest or idling, the battery may go dead. Turn the car stereo off when the engine is at rest or idling. â¢ If the system remote control wire of the amplifier is connected to the power terminal through the ignition switch (12 V DC), the amplifier will always be on when the ignition is onâ regardless of whether the car stereo is on or off. Because of this, the battery could go dead if the engine is at rest or idling.
2. Twist the battery wire, ground wire and system remote control wire.
6 m (19 feet 8 inch) Jack for the bass boost remote control Connect this jack and the bass boost remote control with the bass boost remote control wire. Connecting wire with RCA pin plugs (sold separately).
3. Attach lugs to wire ends. Lugs not supplied.
â¢ Use pliers, etc., to crimp lugs to wires.
Speaker output terminal
4. Connect the wires to the terminal.
RCA input jack â¢ Fix the wires securely with the terminal screws. GND terminal Power terminal System remote control terminal RCA output jack Speaker wire
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of speaker that is connected to the speaker output connector and the car stereo system: LPF/HPF Select Switch
LPF (Left) OFF (Center) HPF (Right)
Audio frequency range to be output
* â 40 Hz to 120 Hz Full range * 40 Hz to 120 Hz â
Subwoofer Full range Full range
Fuse (30 A)
Connect a subwoofer.
Subwoofer Other than subwoofer
Nominal input: Min. 150 W Max. input: Min. 300 W Nominal input: Min. 600 W Max. input: Min. 1 200 W
Speaker output terminal See the âConnecting the Speaker Wiresâ section for speaker connection instructions. RCA input
Amplifier with RCA input jacks
System remote control wire Ground wire
Use if you want to cut the very low frequency range* because it is not necessary for the speakers you are using.
Subwoofer Other than subwoofer
* See the âCut Off Frequency Controlâ section.
System remote control wire (sold separately) Connect the male terminal of this wire to the system remote control terminal of the car stereo (SYSTEM REMOTE CONTROL). The female terminal can be connected to the auto-antenna relay control terminal. If the car stereo does not have a system remote control terminal, connect the male terminal to the power terminal through the ignition switch.