Distinguishing the K9 from the K9 Pro ESS are several key elements: it features a slightly different PSU, employs dual 9068AS DAC chips as opposed to dual 9038PRO, includes a newer USB controller (XUF308 instead of XUF208), and lacks official MQA support. Moreover, the K9 is 40 grams lighter, has a similar but slightly modified aesthetic, and lacks a side USB-C OTG port. Priced about $350 USD cheaper than the K9 Pro ESS, the K9 stands as a compelling alternative. Initially, I expected it to launch at around $650, so discovering such a technically impressive all-in-one unit at $500 was a pleasant surprise. Once again, the FiiO team has outdone themselves.

But the ampsandsound Casablanca just kept saying, “I’ve got more in the tank. You just can’t hear it.” So, I’d certainly encourage consideration on speaker pairing, leaning towards high efficiency speakers. Justin does lots of his voicing on horn and LS 3/5A speakers. Justin is also a speaker builder, but that’s a story for another day.

As Rick Blaine walks into the evening fog with Louis Renault as the plane departs for America, if you purchase a pair of these wonderful ampsandsound Casablanca monoblocks you too will say, “I think this is the beginning of a beautiful friendship.”