Pioneer GM-X542 Connecting the Power Terminal, Connecting the Speaker wires, Component Guide

Fuse (30 A)

Positive terminal

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.

4.Connect the wires to the terminal.

•Fix the wires securely with the terminal screws.

	GND terminal
Power terminal	System remote
	control terminal

Connecting the Speaker Terminals

1.Expose the end of the speaker wires by about 10 mm and twist using nippers or a cutter.

4. Push on the terminal cover.

Connecting the Speaker wires

The speaker output mode can be two-chan- nel (stereo), one-channel (mono), or three- channel (stereo + mono). Connect the speaker leads to suit the mode according to the figures shown below.

Three-channel mode, two-way system

Setting the Filter Constant

Low-pass filter (for subwoofer/woofer): 6 dB/octave

0dB

L1

Band-pass filter (combination of low-pass filter and high-pass filter for mid- bass/mid): 6 dB/octave

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

System remote

control wire

Ground wire

Twist

10 mm

2. Attach lugs to speaker wire ends.

•When either the RCA input or the speaker input is connected, RCA output becomes functional. Do not connect both the RCA input and the speaker input at the same time.

Two-channel mode (stereo)

C1 Mid-high (Left)

L1 Woofer (Mono)

Mid-high (Right)

–6dB

f

fC 2fC

L2 C2

			0dB
			–6dB
fCL	fCL	fCH	2fCH
2

the battery.

	Engine	Interior of
Fuse (30 A) compart-
	ment	the vehicle

Drill a 14 mm hole into the

Insert the O-ring rubber vehicle body. grommet into the vehicle

body.

Battery wire

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.

(Right) Speaker input (Left)

+ - - +

+--+

(Left) Speaker (Right)

C1

Three-channel mode, three-way system

High/mid-high

C1 (Left)

		Mid/mid-bass
L2	C2
		(Left)

L1 Woofer/subwoofer (Mono)

High-pass filter (for mid/mid-high): 6 dB/octave

C1	0dB
	–6dB
	fC	f
		fC
	2

•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 capac- itors 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.

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

Ground wire

Lug

Battery wire

• Fix the speaker wires securely with the termi-

nal screws.

Terminal screw

Terminal cover

Speaker terminal

Speaker wire

One-channel mode (mono)

(Right) Speaker input (Left)

+ - - +

-+

Speaker (Mono)

Three-channel mode (stereo + mono)

The power amplifier is basically a two- channel/one-channel bridgeable amplifier, but three channels can be achieved by combining the stereo and mono modes using inductors and capacitors.

L2 C2	Mid/mid-bass
	(Right)

C1 High/mid-high (Right)

•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.

Component Guide

Speaker load Impedance	2 Ω		4 Ω		8 Ω
fc (Hz)	L (mH)	C (∝F)	L (mH)	C (∝F)	L (mH)	C (∝F)
50	6.4	1,600	12.70	800.0	25.50	400.0
80	4.0	1,000	8.00	500.0	16.00	250.0
125	2.5	640	5.10	300.0	10.00	160.0
200	1.6	400	3.20	200.0	6.40	100.0
320	1.0	250	2.00	125.0	4.00	62.0
500	0.64	160	1.30	80.0	2.60	40.0
800	0.4	100	0.80	50.0	1.60	25.0
1,250	0.25	64	0.50	30.0	1.00	16.0
2,000	0.16	40	0.30	20.0	0.64	10.0
3,200	0.1	25	0.20	12.5	0.40	6.2
5,000	0.06	16	0.13	8.0	0.26	4.0
8,000	0.04	10	0.08	5.0	0.16	2.5
10,000	0.03	8	0.06	4.0	0.13	2.0