I just discovered something that blows my mind! Ever since getting the Pro iCan... about 3 or 4 months ago, I have never tried driving my LCD-3F's on the highest gain setting... I have gone back and forth on the lowest and middle settings. This evening, for the first time, I flipped the switch up to the highest setting. And, man alive... my sound really came alive! It was no slouch on the lowest setting, where I played it most of the time... and occasionally I tried the middle gain setting. Just this evening, I decided why not try the highest setting... so I did. Now, I won't go back after hearing this highest gain setting. I hear great focus, great transparency, and even more black background. Have you tried it with your phones? And, especially anyone using the LCD-3F's, I would like to hear from you.
Just so you know, besides the good Pro iCan, I have my music program Amarra 4 Plus on my 2016 MacBook Pro. My music files are stored on an external solid state drive. I use a PS Audio DirectStream DSD DAC. I'm really pleased with the sound from this system. Mighty fine!