If you get 1V offset at the speaker output with loads connected, either the output cap is bad or it doesn't have one. I don't have the schematic in front of me. What you want for idle current is 20mA through the emitter resistor. To calculate what voltage you should read across the resistor, multiply 20mA x the resistor value. If the resistor is 0.47 Ohms, you should read about 10mV across it.