If you’re a producer or musician who has gone deep into the Universal Audio Apollo system, you’ve likely been waiting for this day for a long time. The dream of a truly portable UAD system that is bus powered has been on my mind for quite a while, and I’m very excited that day is finally here. I was cautiously optimistic that the Arrow would live up to what I had built up in my mind as the first bus powered interface from UA. I spent 2 weeks with one and here’s what I discovered.