The official Dwyer Instruments, Inc. site to investigate, learn, and buy online pressure, flow, level, and temperature, gas sensing, and air velocity instrumentations and controls. Just got some studio headphones for Helix LT Well, I just was blessed with complete remission from T Cell Lymphoma and I'll be going for a Bone Marrow Transplant in the next 6 weeks. It's a month in the hospital and I want to be able to play my guitar while I'm stuck at the hospital. I'm kicking around going to a Helix and looking around, I'm finding I can get a used Helix for about as much as a new Helix LT which doesn't have a lot of used product out right now. I don't have any use for the additional I/O that the Helix offers aside from possibly the mic input for vocal...