Back to the original point, do you think 2 HomePods are going to outperform a decent 2.1 setup for the same price? And as far your zeppelin goes, I'll take a dedicated 2.1 over it too, even the setup I mentioned earlier.
The frequency response range I quoted has nothing to do with your zeppelin, which for whatever reason you continue trying to shoehorn into every point. I put the hypothetical range out there because you said, "I’m not referring to how low frequencies the sub in the HomePod can go. I’m talking about overall sound quality," when frequency response and sound quality are very clearly related. It seems that perhaps you were unaware of that fact, so maybe you should "just stop."
You seem to be hyper defensive about B&W for some reason, as evidenced by your claim that I'm somehow trying to "dis them" simply because I don't think their wireless speaker can outperform a real 2.1 setup. In actuality, I have nothing against B&W and actually think their equipment is very nice stuff. Further, I can't think of a ~$700 wireless speaker from any company that I'd take over an equivalently priced 2.1 setup, and that includes B&W. The fact that you put the qualifier 'wireless music system' in there in the first place says something.