Not on the same level (i.e. way more bass in the IM70). But definitely adequate deep sub-bass in the Doppio. The only BA bass I've ever heard go toe to toe with a dynamic nearly basshead (or basshead) driver is the custom 1964 EARS Quad. And those BA drivers are vented to get that low. Again, it's tough to compare these different earphones as to which are better (not saying you asked me that here) because they're all great in their on way and have different sound signatures.
Thanks. How does the bass in the Doppio compare to the CKN70 though? Just to get an idea of what it's like.