Understanding Ohms (audio)

[sigep233]

Check it out. if you series speakers together you will raise the ohm load (4ohm + 4 ohm =8ohm) parallel (4ohm +4 ohm = 2ohm)

"mono block" amps are 1 ohm stable, with the lower the ohm load the higher the power produced. so to answer your question you need to find out

1 how many subs you want
2 are they dual or single voice coil

after that calculate ohm load to see if you purchase the 2,4 or 8ohm subs