In-line xover question


Who makes an "audiophile-grade", or at least a competent, in-line xover? I'd like to experiment with one to understand if I can achieve better integration of a pair of subwoofers.

Thank you in advance.
sydneysophia
Kal- I was trying to decribe something that resembles a Rothwell attenuator (whereby it connects to the amplier input and accepts the IC from the source or preamp), but acts as xover serving to limit the low frequencies to the amplifier.

Thank you.
I guess what I am referring to is a "passive high-pass RCA type plug-in filter".

Kr4-Looks like Parts Express handles Harriosn Labs. Do you have experience you can share? Thanks for the help.