Subsonic filters prevent VERY low frequencies from being played through the sub. I believe that those frequencies causes more stress on the driver in a ported box than in a sealed box.

Using a subsonic filter can probably be up for debate also :thinking:

 

damn is there a way i can figure how much power a amp has with out knowing anything about it besides that its a 2 channel swiss audio? its the amp i have on the jl's now. and they r in a shitty bandpass both amp ang box were givin to me

 

How many amp fuse(s) is in the amplifier? That can give an rough estimate of max power. You know if it is only a 20 amp fuse the most you can get out of it is less than 300 watts.

For 2 dual 4 ohm speakers you will want a 2 ch. amp running 2 ohms per channel to get the most power out of it. For 200-300 bucks look for a Kenwood x-621. Plenty of clean juice for those subs. I have the mono version running my 3 JL 10 W3v2s. Sounds good. The best option would be a JL Audio 500/1 but new it is a little out of range, retail is $550, but no other amp will as good as that for the money. JL amps are arguably the best. Also, if you have a local shop build you a box have them build a slot ported box. You get plenty tightness and impact as well as smooth low bass. The problem with that is box size. It will be much bigger than a sealed box. Regardless of which you get, get some good power to those woofers and you will be rockin'. W3s are good speakers.

 

thanx man for the info but i kinda had my mind on a eD NINe.2x (link below)


http://edesignaudio.com/product.php?...pid=33&cur=USD

 

Swiss Audio rings a bell, have I talked to you on AIM before?

 

i dont kno whats ur aim