Interesting impressions Ds. What I've found - in general - too is that BA earphones tend to do better with tips that have a smaller diameter in its bore. The Heaven V might be the one exception (and TF10). But the W4, SE535, SE530, and BA200 all performed best this way to my ears. So the Heaven V come with tips with both wide and narrow bores. This morning I decided to give the magical FX850 a break and take the Doppio to work with me. I decided to the V large narrow bore tips on it and WOW! Perfect fit with excellent sub bass that doesn't obscure the wonderful transparency and clarity of the Doppio. I will hear the Tenore soon, but it's hard to believe it can outperform this Doppio. This may be the best dual BA earphone I've ever heard. It's amazing because I heard no bass for the first week of owning this BA earphone. It truly needed burn-in. Burn-in works. Too bad some of you non-believers won't even try it.