The HF3 sounds like an SR225 class level Grado stuck into wood cups. I'm using TTVJ pads. The GO Blu charges from both the high speed (USB C to C) and lower power (USB A to C) chargers. I could care less about U&M and dislike that they "own" the town (hey, many Universities are growth businesses) but here is something to annoy you. There's always Baylor in TX. Pay Harvard fees to get a non Harvard education. Wannabe USC. Should read the WSJ expose of Baylor marketing practices in getting people who cannot afford them into their school with massive parent loans. Not enough IMO. For portable, really need something more muscular like iFi Micro BL.