Audio Engineering

Preamplifi ers and Input Signals 225

0.015μ

0.015μ

0.15μ

10 K

100 K

100 K 100 K

4K7

8K2

Ein

1K

1500 pF

0V

Eout

Figure 7.57 : Circuit layout of passive tone control.

0.01 0.01

0.047 0.047

2K2 2K2

4K7

8K2

Ein Eout

8K2

47 K

100 K

0V





Figure 7.58 : Negative feedback type tone control circuit.