i've got a yamaha a/v reciver and i'm able to change my ohms setting from 8 to 6and4 or just 6 , should this be put in to the lower setting and what will it enable me to do? i've also got cerwin vegas the entire v-series execept for the sub. i've been told that cerwin-vegas will run better at a lower setting ! is this true and should i switch my a/v/ reciver to the lower setting . i want to get the best shound out of my system , i figure i should since i've spent a good chunk of dough on it .. Thank you .