Oh yes, we emailed on this last month. Search for a posting I replied to a fellow looking for phase splitters for 6AQ5s. I gave a nice discription for a 6H30. This will take the amp over the edge. Also I'm running it with only 2DB NFB. I ran the amp for a week or so with no NFB. But after testing found total output losses went from 3db to 2db with no ill sonic affects. I hope to use this amp with the Pi 1 (minis) I asked about below but for now I'm using it with stock JBL L88 plus speakers. I also had it running a similer speaker to Pi 4 pros but replaced then due to Christmas decorating required smaller speakers. The Lionel train set runns behind the speakers.