Not knowing what speakers you have or anything about the situation, I would start with looking to see if the manufacturers of your speakers provide recommended processing for your speakers. If they do then is probably where you should start. If not then the next best option might be to measure the
frequency response of your
system and adjust the filters to obtain the desired response. If you don't have the tools for that then you may have to simply go by ear and hopefully you are good at identifying frequencies.
What is your
system? Are you running subwoofers and/or running the mains bi-amped? The
crossover settings are going to depend on what you are trying to do and the products involved. A
crossover usually consists of a high pass filter that is used to
send higher frequencies to the mains (or to the HF
driver(s) in a
bi-amp situation) along with a low pass filter that sends the low frequencies to the
subwoofer(s) (or to the
woofer in a
bi-amp scenario). Again, the manufacturers recommendations for processing are the best place to start, but if you don't have those then to offer any recomendations we'd need to know what speakers and amplifiers you have and the
system configuration (subs and full rnage mains,
bi-amp mains, subs and
bi-amp mains,
etc.). It might also help to know things like the genre of music potentially involved.
I have to be honest and say that it sounds like you might benefit from involving someone more familiar with setting up
speaker processing and the DR 260 in particular. Maybe you can check around locally and find someone that could help you.