I was doing a bit of research into replacing my standard audio underseat subs(EU not US) and according to the pdf found on the forum the stock subs receive 30-500hz from the head unit.
Now I was looking at a few amps and the low pass filter seems to be generally 50-250hz.
If that's the case wouldn't the SWS-8 miss out on some freqs?

As an example here are a few amps I am looking at below.
Which would be ideal for 2 x SWS-8 @ 4ohm? Some are 4 channel but would bridge it into 2 channels anyway.
The quakes would be the only things running off the amp.

Sorry if its a lame question, not too technical about sound in general.

 

i got my sws8 playing at 120hz and down. they prolly only get down to look 80z. so basically i got hardly any mid range and nothing really low. the amp i have only has low pass so i cant comment on what they sound like on full range. certain songs absolety slam for those tiny ass speakers. others songs sound like dog shit

 

What amp is driving them?

I might do a test first.
Just add the amp to power the stock subs, since I need to run all the cables anyway and then just drop in the SWS-8s later.