just got my Slee Solo with PSU 1.
This is a used unit so I would expect it to be fully burned in. However since I just got it it was quite cold and it just never gets warm. Feels strange compared to the Canamp get really warm and it has a much larger case with more air inside. Should be up to speed anyway I hope. Testing it with the PRO 900 currently.
Impressions noise floor is great. It´s totally silent with my low impedance cans. It´s also super clear you really feel that you hear everything. Super clean sound maybe a bit clinical. Not sure how well it will work with classical. Playing Michael Jacksons invincible there is so much energy I am getting nausea really weird but great feeling. A bit lighter on bass compared to what I am used to but still not bass shy great beat. Have a weird feeling that the music is playing at 2x speed.
Listening to calmer music like Diana Krall it´s obvious here too... Feels like it plays way faster then on any of my other amps including my Pimeta. If you want to relax pick another amp for this headphone anyway. I will have to experiment with my pulse clock it´s so intense it´s scary. Really had to switch of my LFE. If you have ever risen to fast from a chair and fainted it´s how I am feeling right now sensory overload I guess

. All these traits seem to indicate it´s a great match for the HD 650 will have to try that if I can get my PRO 900 of my head...
Surely an unique experince I have to say...