The Cargo Cult Stemcell 2 Free Full Activated

This program is a multichannel stem filter with an independent LPF and HPF for each channel in a surround stem. It also works as a cleanup filter for your stem bus before you record. It'll save you headroom on the main channels and filter the LFE simultaneously.

It also works as a bass management tool for your speaker outputs. You can use the redirect buttons to take low frequencies out of the mains and send it to the LFE.