0:37
Faulty preamplifier fed signal from audio line tester at medium gain with medium test tone toggling on ...
0:18
Faulty preamplifier fed signal from audio line tester at medium gain with medium constant test tone.
0:39
Faulty preamplifier fed signal from audio line tester at medium gain with loud test tone toggling on and off.
0:18
Faulty preamplifier fed signal from audio line tester at medium gain with electric hum.