I mean if I listen to alot of bass CD's like Bass mechanic and stuff like that which hits real low, how low should I tune my box and what is to LOW?

thanks
Steve

I don't know, I always thought 30 to 20 was pretty low, some may not agree tho

Low - in my opinion is flat frequency response to 10Hz in a car using the cabin gain of the vehicle. I've only auditioned a half-dozen subs that do it right.

My old PPI Pro 10 did it great in a .9 cube sealed enclosure.

If you want to build a ported enclosure, and the sub will handle it, then tuning in and around 23 Hz would get you 'low'. It won't be as loud up around 50 though...

Well I like to listen to bass cd's once in a while so maybe I will try a tune to 25 hz or so.
right now I'm at 31hz and a few songs I play go alot lower, I have to be careful!

Thanks
Steve

^ yes you do have to be careful, a lot of guys kill their subs on the freq sweeps when they go below their tuning point. I would almost recommend a sealed box for this.

^^^x2,with a ton of power

Indeed - Sealed is the domain for infrasonics.

^^^^ like every one above said but if you want more output at the lower frequencies a ported box takes a lot less power if it is done right. having said that the above is still the safest just needs tons of power.

Has the rest of the industry caught up with us yet on the correct use of the terms "subsonic" and "infrasonic"?

Well...

Subsonic: adj
- of less than audible frequency
- flying at less than the speed of sound

Infrasonic: adj
- Generating or using waves or vibrations with frequencies below that of audible sound.