@freediver
Like you said, compact, highly efficient, and deep bass extension don't go together, and I'd wager more that a seller with no review history who doesn't respond to questions is more likely to be pulling stuff out of their rear for ad copy than to have somehow found a way around Hoffman's Iron Law.
It's easy to build speakers. It's damn hard to build quality speakers at a price the market will bear and to successfully run a business selling them, which is why the industry is littered with so many defunct brands.
