I have a 2 channel amp that puts out 400 rms bridged at 4 ohms. That will give me 200 rms per sub. I have some HE2 subs that are 300 rms per sub. I have them in a sealed box right now and they just arent loud enough. Would putting them in a ported box help me out any or would it be a waste of time. Thanks.
Yeah, it will allow them to have more excursion since the box has less control over the cone, plus you get much more output since you'd create the equivalent surface area of 4 subs.
Yeah, it will be fine. No worse than the sealed you had it in. As far as the tuning frequency, try to use a subsonic filter or Harrison Labs F-mods below that if possible to avoid overexcursion of the driver.
Because I know with a ported box with about 50% of the rms wattage it will usually get louder. I figured since im only using about 60-70% of the rms I would be fine without a subsonic filter IMO.
Yeah, it just depends on the tuning frequency. A ported box has a 24db/oct rolloff below the tuned frequency, so if you tune higher, the box will have a steep rolloff at the really low frequencies and the subs won't have as much excursion at that point.