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yeah he knows what impedence is.....
The different ohm rating of a sub basically determines how flexible the wiring is going to be....and it helps when choosing an amp
say you have a 4 ohm sub.....but your amp does more watts at 1ohm......you will not get full power from that amp because you cant wire the sub down to anything other than 4 ohms.......
but if you have dual 2 ohm voice coils on the sub you can wire it down to 1 ohm.......
it's all a about wiring....
it helps when you have more than 1 sub also......say you have 2 single voicecoil 4ohm subs....you can wire the subs down to 2ohms and get more power from the amp....usualy a normal non 1ohm stable amp will do more RMS @ 2ohms than 4ohms RMS
but more than likely it will rate at a higher power at 4ohms bridged
so say you have an amp that odes 175x2 @4ohms RMS
and 250x2 @2ohm RMS
and 525x1@4ohms bridged
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