whats a good x over setting and why

 

For what type of speakers or subs and for what type of amp?. Depends on what you want?

 

two 10in Rockford fosgate HE 200 rms 400 peak. Bolt 350.1 mono amp. like 250 rms @ 4 ohms want deep bass sound =P

 

for two 10" subs, i would start out with it set at 80hz. If you find you are missing frequency, try 100 or 120. However, if you go too high, it will get too noisy. If at 80hz, it sounds too noisy (which it shouldn't) turn it down a little to like 60-70. 80 should be ideal.