Hi David, sadly my system is in a diminished state right now. I packed and shipped the right channel BHK300 to Boulder a couple days ago after it kept going into protection after warmup. So, my positioning exercise will have to wait.
I pulled the Sprout 100 out of the office to substitute. It’s a valiant effort, but the shoes are just too large to fill. The soundstage depth collapsed and instrument and voices are more concentrated in the center. Oddly, there’s a hum between the BHK Pre and Sprout unless I lift the ground on the Sprout. My sense is there’s a slight difference in ground resistance to earth between the two devices, so excess ground current is flowing to the Sprout instead of out of the Pre’s ground pin. I asked PSA support to see if they could reproduced it with in house equipment and am waiting to hear back.
I also started installing 24x72x6" broadband bass traps under the peak of my vaulted ceiling. When complete, it will be a 12ftx4ft bass trap cloud which I expect to solve some chaotic reflections and bass decay.
Then next week two 20A circuits on 6AWG wire with EP2050/EP2750s are going in.