I can confirm that. About 35 years ago, a fellow hobbyist told me that in order to get the most out of my Victor Consolette, the horn had to be rock-hard and totally resistant to vibrations. He recommended painting the inside of the horn with Envirotech epoxy polymer which is a plastic laminate. I did this and the results were HORRIBLE--shrill treble, noticeable surface noise, hardly any mid-range, and no hit of bass. Fortunately, I was able to remove the laminate using Jasco paint remover. The coating literally cracked and popped off the surface. I then applied a coat of matching stain to the wood's surface, and the sound quality returned to normal.emgcr wrote: Fri Dec 05, 2025 1:08 pm ...Polishing, gloss painting or a bright surface finish on the inside of any gramophone horn is disastrous acoustically....
OrthoFan