- 3 - 

 DESCRIPT ION 



4. BUFFER AMPLIFIERS - The buffer amplifiers amplify the test 

 signals to a level necessary for driving headphones or a 

 recorder. 



5. HEADPHONE POWER AMPLIFIER - This amplifier, built into the 

 headphones, amplifies the test signal to a power level 

 necessary for driving the headphone speakers. 



20 



