The uDAC5 goes for peanuts. It is well built, nicely branded, and compact. It converts USB signals to RCA stereo and coaxial SPDIF for outboard DACs and amps. It gets plenty loud, too: posting absolute volume levels roughly in the neighbourhood of an AK380. At those levels, however, IMD, THD, and stereo crosstalk numbers ramp up beyond reason. Its loudest stable volume is about a half decibel louder than an iPhone 6’s maximum, which is enough for me. If your iPhone is behind a EU volume cap, the uDAC5's power will surprise you.