So I have been planning on rebuilding my 412 cabinet for sometime and am waiting for some parts to arrive in the mail... In the meantime I am trying to understand whether to wire my speakers in series or parallel... in my current cab i believe they are in parallel... the speakers are each 8 ohms and my volt meter reads 4 ohms... What are the sonic differences between series and parallel? which one gives me the fullest and most power sound for metal and other heavy rock styles?