I am the proud owner of the Citadel Amp This is just a customer impression. Packaging was top class; Citadel is huge, heavy and impressive; I still building furniture around it I feed this Amp with RME ADI 2 DAC and with Meze Empyrean planars. With Citadel I can really see now why Empy is a flagship headphone. Also the DAC was elevated quite impressive. Compared with the good amp section of the RME everything is more in sound, soundstage is wider in all directions and more focused, instruments are well positioned in space and with more body and air. I can hear more details and textures; Dynamics and transients are just perfect for my ears. Bass is now deeper and hit harder, mids and highs are so sweet. Live recordings are teleporting me with the artists in the same place with them I was worried about power but not after first minute of listening, still plenty of room without any distortions; I find Citadel fast, neutral, liquid and natural; this is what I was looking for. I like many genres of music, so depending on my mood I need my chain to serve me well in all cases and is doing very well. After a huge leap of faith, I'm a very happy customer and recommend this Amp highly, also Thomas is very helpful and nice guy!