Quote Originally Posted by Toofastgs View Post
Ok, Wow!

First off any subs need to have the LPF (low pass) Set. This will block all frequencies that are above the hz you set and let every thing below that setting through.
So, if a LP is set to 80hz it will let all hz below 80 go to the speaker and everything above 80 will be blocked.

HPF (high pass) will Block any hz below what you set it too and what is above it pass to the speakers. So you have your HP is set to 80hz it will let all signal above 80hz go to the speaker and any under it will be blocked.


Now to get the best sound for what the sub can do need to know the specs.
A general rule of thumb is to st a LP to 80hz and hp to same or if your speakers can go lower a little lower for a better roll off.
I have my system set for SQ I have my sub lp set for 80hz and my front speakers set to 80hz with a slop of 12db so the roll off aka hand off is smoother.

There is a lot more involved in tuning a system. Like you also want to set your amplifier gain so your are not clipping any signal. The way you want to do this is with a oscilloscope but most people do not have access to do this so next step is using a DMM. And again this is the advanced audio set up and if you want to get the best of what your equipment can do then there are steps you have to take.
Using a DMM to set your gain isn't necessarily appropriate. Typical music source is recorded below 0db. So using a DMM and tones won't be as accurate as you believe. Every engineer records the music differently too depending on their goals, i.e. equalizing for more bass n' such. If you set with a DMM then you're typically losing out on available power from your amps. I prefer to set by ear with the source volume 3/4 of the way up. But I also have an LED for clipping available to me. I've found that most clipping occurs below 300hz and it's usually rap, hip hop, or related genres.