Going back to what I’m hearing with the LKS USB-100, for critical listening, I use my headphone system because it offers much more transparency than my 2-channel. It makes discerning differences and nuances easier. I use Sennheiser IE900 IEMs so the only "room acoustics" is inside my ear canal. Not even my outer ear is allowed to cause acoustic interference. I want to really stress that when I’m reporting hearing more nuances, I’m using these highly transparent IEMs that allow the tiniest of nuances to come through easily. The IE900s contain a single dynamic driver and they are able to play bass with force that would put some full sized headphones to shame. My current speakers are the Zu Audio Soul 6’s and they too display the same types of improvements with the LKS USB-100.
Amp for IEMs and speakers: Enleum AMP-23R
Ethernet/USB/I2S chain: Ediscreation Fiber Box II > Intel NUC > ISO Regen > LKS USB-100 (Fiberbox II and ISO Regen galvanically isolates the NUC from the system; NUC power is from the wall and not from the inverter/battery system)
Digital cables: Straightwire and Cardas Clear USB cables around ISO Regen, Wireworld Platinum Starlight 48 HDMI into 005
AC Conditioning: Giandel 5000W Inverter and LiFePO4 battery, Puritan PSM 136
Power cables: Furutech DPS4.1 with FI 52 NCF connector between inverter and PSM 136, Zavfino Silver Darts into LKS LPS/005/AMP-23R (all Silver Dart PCs powered by PSM 136), Shunyata V14 Digital into Fiberbox II and ISO Regen SMPS
Interconnects: Zavfino Silver Dart RCAs
Side Note: the 005 is a match with the Enleum AMP-23R and high sensitivity headphones ONLY if line level attenuators are used between the 005 and AMP-23R. Without the attenuators, the signal for the IEMs was too hot and the gain/volume selector on the AMP-23R was too sensitive.