I know that there are some well known bass players like John Entwistle and Chris Squire that use a setup that includes bass and guitar amps. Just wondering how they achieve that. I know that they split the signal in 2 using a high pass filter/splitter or so. Can anyonerecommend a high pass filter/splitter to me and how it would be set up? At what frequency should the signal be sent to the guitar amp? Thanks.