11
1234
A
B
C
D
4
3
2
1
D
C
B
A
1
2
3
4
5
6
X1
X2
X3
2
1
3
4
2
1
3
22
11
33
BBlock Diagram
U1(INA163)
TUBE-12AX7
2
1
3
2
3
22
33
2
1
3
1
2
3
4
5
6
X1
X2
X3
POWER SUPPLY
AC18V
+12VDC
+15VDC
-15VDC
+48VDC
PHANTOM
CH1 MICROPHONE INPUT
CH2 OUTPUT
2
1
3
4
PHASE
PHASE
+ PAD(20dB)
CH1 MICROPHONE INPUT
U2(INA163)
+ PAD(20dB)
VOLTAGE REGULATORUPPLY
CH1 OUTPUT
6. TECHNICAL SPECIFICATIONS
6.1 Block Diagram
1
11