Important ported enclosure question

[danometal 1]

Are you sure you hear the sub and not the environment? Possible, just not everyone can.

As for the port, what size Icon and what size box?

I was thinking a single 15" in 4 cubes.

Do they make preamp subsonic filters? Just curious.

Yeah actually they do make preamp sub sonic filters.

Nice. I may use one and compromise between the 2 discussed frequency ranges, and go 25 hertz. That would be sweet.

Really still too low. There will be NO benefit of tuning that low. Really below 28 in a car will NOT help your response in general.

I understand that most music doesn't go that low, but a tuning frequency that low would even out the frequency response hump. So it has to be beneficial for somebody looking for that, no?

Yea, that's kind of what I was thinking. Plus, I highly value the subsonic response for how cool it is, and how it makes me feel.

[shizzzon 461]

depending on how you tune... you may not even use a subsonic filter.

Take a look at my setup-

I run 4 15s in a wall approx 12-12.5cuftNET tuned to 27-29hz daily.

I have my subsonic filter set at 5hz on all my bass amps.

These 4 15s are rated at 1,000w per sub, i run 1750w amp rated power to each one.

I have NO unloading issues because i play music that is suited for such designs.

Now, there are some songs i listen to that go down to 9hz and i can't crank those songs up due to the subsonic being set so low. The subs move pretty damn good on low power below 18hz as it is.

In the future, i will turn the subsonic up a little but for the time being, it's a testing phase thing right now.

[danometal 1]

depending on how you tune... you may not even use a subsonic filter.

Take a look at my setup-

I run 4 15s in a wall approx 12-12.5cuftNET tuned to 27-29hz daily.

I have my subsonic filter set at 5hz on all my bass amps.

These 4 15s are rated at 1,000w per sub, i run 1750w amp rated power to each one.

I have NO unloading issues because i play music that is suited for such designs.

Now, there are some songs i listen to that go down to 9hz and i can't crank those songs up due to the subsonic being set so low. The subs move pretty damn good on low power below 18hz as it is.

In the future, i will turn the subsonic up a little but for the time being, it's a testing phase thing right now.

Wow. What a setup!!

You're one of many people I've encountered who tune at 27 hertz. I'm thinking tuning around 25 hertz wouldn't be too substantially different, plus my Rockford amp only starts making notes at 20 hertz. In essence, I'm thinking I could just forget the subsonic filter given the small 5 hertz window in between. Any thoughts?

[KU40 173]

Your Rockford amp doesn't only start making notes at 20 hz. It's just a range that fits within whatever guidelines they set forth, just like sub manufacturers. They'll say frequency response 30-400 hz or something, but really that just means that the response of the sub is +/- 3db over that range, or whatever parameter they want to use.

Your amp can put out notes below 20 hz, but maybe it has a bit higher distortion or something.

[///M5 2,833]

You can tune there but it won't help your response and will just cause you to lose some output. In a car it is not necessary.