Not dub, exactly (I should get around to a dub post one day), but dub-adjacent ambient techno.
Up top, 1996 subaquatic frequencies from Berlin duo Porter Ricks.
The beatific and pastoral GAS, from 1999:
The glitchy, staticky and drifting Pole, also from 1999:
The spacy Monolake, from 2001:
EDIT: I knew these were all roughly from the same time period, but I just realized they are also from the same country. Those Germans sure love their dub techno (and so do I). Let’s all engage in baseless cultural speculation as to why!