Sub Crossover point

[qkassidyw 10+ year member]

I like mine at 50hz w/ a -24dB/oct slope.

^Wow...thats pretty low with a steep slope...

I'm around 65 with a 12dB slope. NO MIDS FROM MY SUB!

 

[helotaxi 5,000+ posts]

The low freq capabilities of the mid-basses up front are what should determine where you cross the subs. The more low end the front stage has, the lower you can cross the subs. If you're looking for quality over quantity in your bass, lower is better.