hmv 157 - cheap ????

[CarlosV]

Not surprisingly the reproduction improves with the increase in size of the horn.

Yes, that's physics! Cutoff frequencies and resonances are determined by the shape and dimensions of the conduit, from acoustics to microwave. This is the reason for the 202 to have the best response amongst smaller horns of identical design, like the 163 and the US Victor Credenza. In the 1920's like in 2023, the horn (loudspeaker) is the single most important element in the sound reproduction chain.