I have a pair of speakers I am using in my boat that are 8 ohm (300 watt max) Evid 6.2's, I have a an MB Quartz 4200 amp that does 100 x 4 at 4 ohms. Should I run the speakers in parrallel to get the amp to see a 4 ohm load and minimize work on the amp and or should I bridge the amp down to 2...