Afterwards the Modular preamplifier presentation good is I present also a simpler circuit in the manufacture but very good quality. And in this circuit the philosophy that follow is: simple is also better. As you will see in the circuit, it was used only that a Volume potentiometer. Even the Tape Monitor choice, is considered more enough seldom in the use, remaining useful only in those who they allocate and insist to use 3 heads cassette players and tape open reel. Otherwise can used also this input as LINE, after does not differ in nothing from the other inputs or be suppressed. All the components that constitute the circuit should be top quality. The preamplifier gave sound very good and neutral.