I tried the SR out of an iPhone 5S yesterday. It sounded good, but speaking for myself I wouldn't pay its price to run it in that unamped configuration. Out of a Mojo, or presumably another good DAC/amp combo or a good DAP, it's really astonishing. But when I switch to the 5S alone, I couldn't say for sure that I would choose the SR over an hf3 or hf5.
This is just my impression, and it's good to keep in mind that I'm spoiled: I've been using outboard equipment with my Etys for years and have become perhaps oversensitized to the difference it makes. Your mileage may vary.
This is just my impression, and it's good to keep in mind that I'm spoiled: I've been using outboard equipment with my Etys for years and have become perhaps oversensitized to the difference it makes. Your mileage may vary.