I accidentally found this on my decent preamp, I was trying to use 2 "Y" connectors from my CD player to connect 1 set of interconnects to preamp "TAPE", second set to a HT receiver, but instead I hooked it into preamp "AUX1".
(I was in the process of doing it and got interrupted with something else for couple days).
When turn on preamp with BOTH "TAPE" AND "AUX1" on, the sound is .. drasmatically changed, with unbelievable detail, image, even loudness.
Just about to post as question if this is a mistake, but I enjoy it so much that I decide to keep it this way, maybe until something ... explode !