i found 4 different amps that are within $20 of eachother and im wondering from other peoples experiences if theres a final sound difference if i were to run a 4 ohm setup vs. a 2 ohm setup.. the amp if for a pair of 4 ohm subwoofers and my options are 2 ohm monoblock or 2 channel parallel 4 ohm.. this is going to be the deciding factor... all 4 amps meet the rms wattage for the subs