Loudspeakers have we really made that much progress since the 1930s?

I'd like to propose that speaker design over the years has advanced hand-in-hand with amplifier design. What would a set of Raidhos sound like, I wonder, hooked up to whatever amplifier was available in the 1930s? What would a 1930s speaker sound like hooked up to a Devialet class D amplifier? (I don't actually know the answer, just though it might be worth asking).

Someone told me the most expensive speaker money can buy today is the very old Western Electric.

Lansche uses the plasma tweeter, and it might be the best tweeter around(from what I heard at the California Audio Show).

Great topic. I have been thinking about (and listening to) speakers recently. The diversity of opinions is colorful!
My observations are:
- Expectations play a large role in preferences.
- There are more ways to get it wrong than right. (Same applies to brewing beer). If someone says they like something, listen. If someone says they don't, it doesn't mean much.
- Compression sucks!
- Garbage in, even more garbage out. (It's very unlikely a non-linearity or distortion will be canceled by another non-linearity or distortion.)
- Technology marches forward (usually).
- Marketing, marketing, marketing (see first point).

Have run vintage systems with all matching gear that I tried to get as orignal as possible and I have used modern as well as combinations of both taking the best of both worlds. That being said a all orignal restored WE RCA Klangfilm etc 1930-40s system would shock most audiophiles and a few times at shows such systems get very high praise. Taking the best of both worlds to me is the best approach if ultimate sound quality is your goal and also if you find this style of system to be acceptable. Many do not we all have our personal tastes biases experiences and since costly one has to get hands on- they are mostly large  and not veneered since meant for  commercial use  greatly limits appeal. But if wanting to try many newer theater pulls available many cheap that with a few mods do great service in a home. Some of the monitors RCA and WE made between 1930-40s are compact and would be fairly easy to get in most homes since cool artdeco style but those are costly and rare indeed.