Velleman К8077 - Manual (Page 31)

31
Filter section :
RV
1A
RV
2B
50k
lo
g
RV
2A
50
k l
og
(g
ai
n:
=
x2)
S_
G
N
D
R6
2
470
SK
1 2
(*
) S
el
ec
t ope
ra
tio
n m
ode
:
Su
bw
oo
fe
r:
R
6
1:
no
t m
ount
ed
R
2
3:
1K
F
ull r
an
ge
:
R
6
1:
1K
8
R
2
3:
no
t m
ount
ed
F
ul
l r
ange
w
ith
6dB
ba
ss
bo
os
t:
R
6
1:
1K
8
R
2
3:
1K
am
p
R6
1
1K
8
(*
)
C2
2
4n7
SK
2
Lo
w
in
(
L
)
SK1
Lo
w
in
(
R
)
SK
3
Hi
gh
in
(
L
)
SK4
Hi
gh
in
(
R
)
S_
G
N
D
S_
G
N
D
C1 390
p
C2 390
p
C6 100
n
C5 10
0n
S_
G
N
D
+1
5V
-1
5V
SW
1
SW
T
S
-4
R7
47
K
S_
G
N
D
Le
ve
l
F
ilt
er
s
lop
e ad
j
Hi
g h p
as
s (
30
H
z)
R9 1K
R8 1K
S_
G
N
D
R6
4K
7
R3 4K
7
R5 1K
R4 1K
S_
G
N
D
R1
2
22K R1
3
22K
fil
te
r
fil
te
r
am
p
Lo
w
pa
ss
C4
100n
C3 100n
S_
G
N
D
+1
5V
-1
5V
C7 10
0n
R3
0
100
K
S_
G
N
D
R2
0
1K
S_
G
N
D
R2
1
1M
R1
9
10
K
ZD
2
5V
1
S_
G
N
D
D1
BA
T
85
S_
G
N
D
C2
9
22µ
F
/6
3
V
R1
8
1K
au
to
+1
5V
-1
5V
+1
5
V
-1
5
V
R2
6
15
K
C1
7
1n
S_
G
N
D
R2
9
100
K
C2
4
22
n
C2
3
22
n
C2
1
68
n
C2
0
47
n
R2
5
39
0K
S_
G
N
D
R2
4
100K
R2
2
33K
R1
4
3
3K
S_
G
N
D
R2
3
1K
6
7
IC
1B
TL
07
2
5 6
7
IC
2B
TL
07
4
9
10
8
IC
2C
T
L 074
14
13 12
4 11
IC
2D
TL
07
4
2 3
1
IC
2A
TL
07
4
R1
5
22K
R1
6
10
K
R1
7
22K
S_
G
N
D 0/
18
0°
C2
5
10
µ
F
C2
6
10
µ
F
S_
G
N
D
R2
7 47
0
C1
8
10
0p
R2
8
15K
R1 22K R2 22K
R1
0
4K
7
R1
1 4K
7
3 2
8
4
1
IC
1A
TL
07
2
5
(*
)
C
onn
ec
t to
c
ha
ss
is
g
ro
u
nd
Schematic diagram