My Question relates to this audio amplifier. The 8 ohm resistor is a speaker. As you can see from the photos everything runs as should until the capacitor (C2) is added to protect the speaker. Then everything seems to become ruined. The graphs shows the voltage at the collector of Q1 and the voltage at the emitter of Q2. I do not understand why. I expected the capacitor (C2) just to act like an open circuit.

R1 100k2 R2 1 2702 PR1 Q2 150A/A R2 Sa 01 150A/A 330uF V1 3R3 .01V 1kHz 5002 0 Transient 1 -PR2: V(6) PR1: V(3) 5.5 Voltage (V) 500 1m 2m 2.5m 3m 1.5m Time (s) R1 100k 3 R2 ? 27022 PR1 Q2 = 150A/A C1 9V Q1 82 C2 HA 150A/A 330uF 330uF V1 .01V 1kHz 3 R3 5002 00 Transient 1 PR2: V(6) PR1: V(3) Voltage (V) 4.5 500g 1m 2m 2.5m 3m 1.5m Time (s) R1 100k2 R2 1 2702 PR1 Q2 150A/A R2 Sa 01 150A/A 330uF V1 3R3 .01V 1kHz 5002 0 Transient 1 -PR2: V(6) PR1: V(3) 5.5 Voltage (V) 500 1m 2m 2.5m 3m 1.5m Time (s) R1 100k 3 R2 ? 27022 PR1 Q2 = 150A/A C1 9V Q1 82 C2 HA 150A/A 330uF 330uF V1 .01V 1kHz 3 R3 5002 00 Transient 1 PR2: V(6) PR1: V(3) Voltage (V) 4.5 500g 1m 2m 2.5m 3m 1.5m Time (s)