SCHEMATIC
BETA PREAMP
8
OUT
IN
BETA BASS VALUES:
SHOWN WITH BETA LEAD VALUES
C14: 22n -> 56n
C19: 27n -> 47n
R22: 10k -> 15k
R23: 12k -> 27k
R24: 22k -> 12k
R27: 91k -> 180k
C18: 4n7 -> 10n
1N5817
+9V
100n
GND
10
0k
B
10
0k
B
100kA
10
0k
B
2M
2
GND
100uF
VA
LT1054CP
100uF
-VA
470n
GND
GND
100uF
GND
10
uF
GND
GND
1N
47
42
A
GND
47k
47k
200pF
GND
2u
2
GND
33pF
VA
-VA
2M2
100k
2u2
1MB
1MB
120k
GND
1M
5pF
GND
100k
47
n
2n
2
47k
CD4069
330k
GND
100R
220uF
220uF
GND
GND
VB
VB
22k
CD4069
68k
22k
68k
10k
82pF
100k
CD4069
2u2
2u2
10
0k
CD4069
470k
CD4069
CD4069
GND
120k
10
uF
100k
VA
-VA
33pF
2u
2
15k
4k
7
GND
22
n
10k
100n
GND
12
k
GND
22k
100k
GND
4k7
91k
10
n
VA
-VA
100n
10
0n
GND
100n
10
0n
GND
12k
8k2
12
k
10n
GND
GND
GND
4n7
GND
3k
3
GND
27
n
-VA
100n
10
0n
GND
GND
VA
220k
1N
45
8A
1N
45
8A
VA
-VA
150R
2u
2
10
uF
10
uF
220uF
GND
220uF
GND
GND
VA
D1
C38
TR
EB
LE
1
2
3
BA
SS
1
2
3
LEVEL
1
2
3
M
ID
1
2
3
RP
D
C29
1
2
3
4
5
6
7
8
IC5
C31
C32
C33
C3
0
Z1
R1
R2
C1
C2
IC1A
2
3
1
C3
8
4
IC1B
6
5
7
R3
R4
C4
DRIVE A
1
2
3
DRIVE B
1
2
3
R5
R6
C5
R7
C6
C7
R8
IC2A
1
2
R9
IC
2P
7
14
R34
C34
C35
R10
IC2B
3
4
R11
R12
R13
R14
C8
R15
IC2C
5
6
C9
C10
R1
6
IC2D
9
8
R17
IC2E
11
10
IC2F
13
12
IC3A
2
3
1
R19
C1
1
R18
IC3B
6
5
7
8
4
C12
C1
3
R20
R2
1
C1
4
R22
C15
R2
3
R24
R25
R26
R27
IC4B
6
5
7
C1
6
8
4
IC4A
2
3
1
C23
C2
4
C25
C2
6
R28
R29
R3
0
C17
C18
R3
1
C1
9
IC6A
2
3
1
8
4
C27
C2
8
R32
D2
D3
R33
C2
0
C2
1
C2
2
C36
C37
IC6B
6
5
7
