26
GM-X822,X722
Connecting the Speaker
wires
The speaker output mode can be two-chan-
nel (stereo), one-channel (mono), or three-
channel ( mono). Connect the
speaker leads to suit the mode according to
figures on the following pages.
•
When connecting to the speaker input, do not
connect the RCA
output.
•
When connecting to the RCA
input, do not
connect the speaker input.
T
wo-channel mode (stereo)
One-channel mode (mono)
Three-channel mode (
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.
Thr
ee-channel mode, two-way system
Thr
ee-channel mode, thr
ee-way system
•
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/sub-woofer
, 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.
T
ape or use heat shrink on the
joints to prevent short circuits.
C2
C2
L1
L2
L2
C1
C1
C1
L1
(Left)
Speaker
(Right)
Speaker
(Mono)
Mid-high (Left)
W
oofer (Mono)
Mid-high (Right)
High/mid-high
(Left)
Mid/mid-bass
(Left)
W
oofer/sub-woofer
(Mono)
Mid/mid-bass
(Right)
High/mid-high
(Right)
Component Guide
Speaker
load Impedance
2
Ω
4
Ω
8
Ω
fc (Hz)
L
(mH)
C (
µ
F)
L
(mH)
C (
µ
F)
L
(mH)
C (
µ
F)
50
6.4
1,600
12.7
0
800
.0
25.5
0
400
.0
80
4.0
1,000
8.0
0
500
.0
16.0
0
250
.0
125
2.5
640
5.1
0
300
.0
10.0
0
160
.0
200
1.6
400
3.2
0
200
.0
6.4
0
100
.0
320
1.0
250
2.0
0
125
.0
4.0
0
62
.0
500
0.64
160
1.3
0
80
.0
2.6
0
40
.0
800
0.4
100
0.8
0
50
.0
1.6
0
25
.0
1,250
0.25
64
0.5
0
30
.0
1.0
0
16
.0
2,000
0.16
40
0.3
0
20
.0
0.64
10
.0
3,200
0.1
25
0.2
0
12.5
0.4
0
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
Setting the Filter Constant
Low-pass filter (for sub-
woofer/woofer):
6 dB/octave
High-pass filter (for mid/mid-high):
6 dB/octave
Band-pass filter (combination of
low-pass filter and high-pass filter
for mid-bass/mid): 6 dB/octave
•
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.
L2
C2
0dB
–6dB
f
CH
2f
CH
f
CL
f
CL
2
0dB
–6dB
f
C
f
f
C
2
C1
0dB
–6dB
f
C
2f
C
f
L1
Summary of Contents for GM-X722 X1R/ES
Page 3: ...3 GM X822 X722 2 4 3 1 10 7 9 8 5 6 8 11 2 EXPLODED VIEWS AND PARTS LIST 2 1 PACKING Fig 1 ...
Page 5: ...5 GM X822 X722 2 2 EXTERIOR Fig 2 ...
Page 11: ...11 GM X822 X722 ...
Page 13: ...13 GM X822 X722 5 6 7 8 5 6 7 8 A A B C D CN553 AN MOTOR Fig 5 C ...
Page 22: ...22 GM X822 X722 7 3 BLOCK DIAGRAM Fig 11 C A B ...
Page 28: ......
