justubes2:
The Synergistic Research Black A/C outlet has more complex and better qualities than the Teslaplex, Teslaplex SE, and the Furutech GTXD-R (Rhodium). I found your one sentence descriptions of these outlets to be accurate and concise.
The Black outlet has the best of each outlet's qualities put into one single outlet. There is better definition and micro detail than the Teslaplex, more forward and bigger presentation (more emotion) than the Furutech. The space between the instruments is excellent but not so dark that one gets a cold and sterile soundstage. It has the air of the Furutech without the rhodium metal sound.
On the headphone system I am using 4 Teslaplex SE + 1 Black outlet. This is with the Sennheiser 800 headphones (these headphones have a big soundstage to begin with). When I put the Enigmacoustic Dharma headphones in the system I will try 3 Teslaplex SE, 1 Furutech GTX-R, and 1 Black outlet.
On the Terasonic speaker system I replaced the Furutech GTX-R with the Black outlet. This kept the big soundstage with less of a metal sound and a more relaxed sound. The other 4 outlets are Teslaplex SE.
I do like the sound of my systems to fill the room and not be "over there".
The headphone system certainly is not limited to being "inside my head".
I do think the Synergistic Research Black outlet is a significant development showing improved qualities in several areas. I think this outlet is worth the premium price.
David Pritchard