Thanks Rontec, For the post.I pulled one of my 19 Xo's to show the jumpers on the ground lugs.I should also add that he upgraded the wire gauge to thicker.The first thing I noticed when I installed was the bass response was awesome much improved.I wanted to keep my original Xo's original so I bought an extra 2 sets from ebay.Had 1 done by Dave and hoping Todd can get to the 2nd pair after the Holidays and maybe use different caps to experiment alittle will see.Regards ~ AB

Happy Holidays to You and Yours !!!!