I have a rig with a 2x10 cab and a 1x15 cab. My head is an ordinary mono head. When I play loud the 2x10 cab starts farting because it can´t reproduce the lowest frequencies. Is there anyway I could use some kind of a highpass filter between the amp out connection and the 2x10 cab? And still let the 1x15 cab get the fullrange frequency? Any suggestions?