Pioneer GM-X862 Owner's Manual - Page 3

Connecting the Unit Connecting the Power Terminal • 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. 1. Pass the battery wire from the engine compartment to the interior of the vehicle. • 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 4. Connect the wires to the terminal. • Fix the wires securely with the terminal screws. GND terminal Power terminal System remote control terminal System remote control wire Ground wire Battery wire Fuse (30 A) Drill a 14 mm Positive terminal (1/2 inch) hole Insert the O-ring rubber into the vehicle grommet into the vehicle body. body. 2. Twist the battery wire, ground wire and system remote control wire. Twist 3. Attach lugs to wire ends. Lugs not supplied. • Use pliers, etc., to crimp lugs to wires. Lug Lug Battery wire Ground wire Connecting the Speaker Terminals 1. Expose the end of the speaker wires using nippers or a cutter by about 10 mm (3/8 inch) and twist. Twist 4. Push on the terminal cover. 10 mm (3/8 inch) 2. Attach lugs to speaker wire ends. Lugs not supplied. • Use pliers, etc., to crimp lugs to wires. Lug Speaker wire 3. Connect the speaker wires to the speaker terminals. • Connect the speaker wires, passing them through the terminal cover. • Fix the speaker wires securely with the terminal screws. Terminal screw Speaker terminal Terminal cover Speaker wire Connecting the Speaker wires The speaker output mode can be two-channel (stereo), one-channel (mono), or threechannel (stereo + mono). Connect the speaker leads to suit the mode according to the figures shown below. Two-channel mode (stereo) Three-channel mode, two-way system C1 Mid-high (Right) L1 Woofer (Mono) C1 Mid-high (Left) (Right) Speaker (Left) One-channel mode (mono) Speaker (Mono) Three-channel mode (stereo + mono) The power amplifier is basically a twochannel/one-channel bridgeable amplifier, but three channels can be achieved by combining the stereo and mono modes using inductors and capacitors. Three-channel mode, three-way system C1 L2 C2 L1 L2 C2 C1 High/mid-high (Right) Mid/mid-bass (Right) Woofer/subwoofer (Mono) Mid/mid-bass (Left) High/mid-high (Left) • Inductors (L1 and L2 in the diagrams) act as low-pass filters. Capacitors (C1 and C2 in the diagrams) act as high-pass filters. Inductors (L) are used for the woofer/subwoofer, and capacitors (C) are used for the high/mid-high. • Remember when bridging an amplifier it will see only half of the original speaker impedance. Therefore, you must use speakers that have ratings of 4 ohms or higher. If you use speakers that have lower impedance ratings it may cause damage to the amplifier. • When the inductors and capacitors are connected to the speaker wires, secure or solder them so they cannot be pulled loose. Tape or use heat shrink on the joints to prevent short circuits. Setting the Filter Constant Low-pass filter (for subwoofer/woofer): 6 dB/octave 0dB L1 -6dB f fC 2f C High-pass filter (for mid/mid-high): 6 dB/octave C1 0dB -6dB fC fC f 2 Band-pass filter (combination of low-pass filter and high-pass filter for midbass/mid): 6 dB/octave L2 C2 0dB -6dB fCL fCL 2 fCH 2f CH • A multi-channel system can be set up using a combination of filters. The inductance (L) and capacitance (C) will determine the frequency (fc) that the speaker will reproduce. Refer to the chart below to determine the components required. • Use the capacitors specified. Non-polarized capacitors rated at over ±25 V should be used for C1 and C2 in the diagram. Because of the voltage output of the amplifier, it is very important to use non-polarized capacitors rated at or over 25 V. This will prevent a safety hazard. Component Guide Speaker load Impedance fc (Hz) 50 80 125 200 320 500 800 1,250 2,000 3,200 5,000 8,000 10,000 2 Ω L (mH) C (µF) 6.4 1,600 4.0 1,000 2.5 640 1.6 400 1.0 250 0.64 160 0.4 100 0.25 64 0.16 40 0.1 25 0.06 16 0.04 10 0.03 8 4 Ω L (mH) C (µF) 12.70 800.0 8.00 500.0 5.10 300.0 3.20 200.0 2.00 125.0 1.30 80.0 0.80 50.0 0.50 30.0 0.30 20.0 0.20 12.5 0.13 8.0 0.08 5.0 0.06 4.0 8 Ω L (mH) C (µF) 25.50 400.0 16.00 250.0 10.00 160.0 6.40 100.0 4.00 62.0 2.60 40.0 1.60 25.0 1.00 16.0 0.64 10.0 0.40 6.2 0.26 4.0 0.16 2.5 0.13 2.0