Foreword: I acquired the Carbo Tenore during a search for a good sleeping IEM. The Tenore sounds very very good when deeply inserted (and V-shaped/almost sibilant with a shallow fit) and is another solid recommendation for a cheap, small-form-factor IEM with a "mainstream-friendly" sound signature. Frequency Response Impulse CSD THD Analysis: As with most IEMs, the treble of the Tenores changes with insert depth. What's measured here is with my recommendation of a deeper insert, which tames the treble peaks and smooths out the overall sound. CSD is nothing out of the ordinary for a DD IEM. Decay is pretty clean though, and I would predict being one of the better ones within its price bracket (more data points required). 1.2k anomaly on the left channel (CSD + THD) is repeatable. Doesn't sound off, though it just could be my brain doing its magic for stereo listening. Overall, the Tenore is a surprisingly clean and clear sounding IEM with a satisfying bass boost and well controlled treble. Certainly not a giant killer by any means, but as far as micro-drivers go it could very well be the best of the lot.