When one company swallows another, it’s common for a slow shift in rebranding and design to occur as the two entities thrash out their roles and relationship. The latest shift in the Logitech-Ultimate Ears story — Logitech purchased UE in 2008 — occured a month or so ago, when Ultimate Ears was rebranded as Logitech UE and launched a suite of high-end, blue-tinged soundware, with a product selection that reached far beyond the in-ear monitors the company has thus far been known for. In fact, out of seven new gadgets, just one new IEM was introduced: the Logitech UE 900 ($400), a quad-armature earphone that now sits at the pinnacle of UE’s non-custom earphone line.

The UE 900 has lineage, of course; we loved the snug fit, solid build and amazing sound of its antecedent, the TripleFi 10. But the TripleFi 10 is gone, and the UE 900 has stepped into its place with new ergonomics, a new sound — and a lot of blue.

So far it’s been pretty consistent: Each time we review a set of Ultimate Ears ‘phones, the bar leaps up a few notches as our expectations regarding the outfit’s offerings rise. After reviewing the 350, 700, and especially the 600vi — which garnered a best-in-class verdict — we were expecting the TripleFi 10 ($400) to slay vampires and cure cancer.

Of Ultimate Ears’ more serious offerings — and by serious, I’m referring to UE’s armature-equipped models, which start at $100 — the TripleFi 10 is by far the most serious, with three drivers and a crossover in each ear, pro-level detachable leads, the thickest cable we’ve ever seen on an IEM, Comply foam tips (the best tips, period) and a sound signature that’ll have you madly running through your entire music catalog with a big, gleeful smile plastered all over your face.