hey man, it really comes down to preferance, what are you running for subs. Some people dont even do a rear stage at all and just do the fronts, I dont got any bass runnin through mine, Thats why i got the subs. But it all really depends on What kind of sound you are goin for in the car. IMO Generally depending on the speaker, the less bass going through it the louder it can go before distorting.