What should we be doing? I use all pass but I know some songs are rough on speakers. If set at HP what freq should we cut off at?

Looking for good recommendations.

 

I set mine to HP with freq between 60-80hz and gain at 5. Sounds great and no issues with speakers. Your gain may vary, depending on the type of music you listen to.

 

since most 6.5" speakers (regardless of what specs say) are not capable of producing below 60hz accurately I would agree with rbferg