I'm not sure about this, but this is just a suggestion ... The subs (might) put out a cleaner sound if you set them up to run at or around 2 or 4 ohms. Will not be as loud on a meter, but it might give the amp headroom and not work as hard to play the lows. I feel that the amp headroom/power cababilities is ALMOST as important as box tuning and installation. Most SQ rides i've seen will only do 128 - 135 db spl. but a alot lower frequiencies, which takes ALOT more power to run. But there subs match better to their systems thus sounding ALOT better to the audio listener. Again, Just a suggestion. Hope this helps.