How Should I Be Using the 'LP Filter' Switch on a JL Audio Sub?
If there is no bass management before it, then set it to ON and then set the crossover point at 40 and tweak from there. Set its level down and ELF to 0. I assume you have no measurements of your room so are flying blind.
- Optimize your room for your main speakers.
- Ask yourself what do you feel is missing?
- I suggest you start with a low crossover point (~40 Hz)at low volume.
—— Bring sub volume up slowly while listening to a bass heavy test track. Ballad of a Runaway Horse is a good one! Once you hear the sub, now begin turning it’s volume down balanced against the crossover point or HP Filter level.
—- Run DARO
—— don’t forget to adjust the phase on the sub (assuming you have a Fathom).
You do not want to be able to locate your sub. It should be ‘invisible’ when you close your eyes. You should ‘feel’ it filling in only those frequencies below which your mains can handle.
Lastly, consider pursuing the free (except for a USB microphone) route of using REW and measuring your room.
So this is what I would do in your situation. It may or may not be what others would do!
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