Here I'm unboxing, examining, assembling, testing and comparing various custom combs and covers of a just a few of the many options that Tom Halchak and Blue Moon Harmonicas offer. We'll take a look at the website, many of their products and reasons to consider trying some of these exciting harmonica harmonica upgrades! https://www.bluemoonharmonicas.com
A couple years ago I indulged myself and picked up a couple of Blue Moon fancy cover sets for Manjis at SPAH. They are cool looking and make for impressive harps. I don't plan on spending what it would take to add bling to ALL my harps, but I like the cool look on those two. When you play, no one can see the harp covers very well. Still, I am glad I bought a couple.
I am of the belief that comb material resonance is not a significant issue when you listen out in the room. I don't think resonance is a big part of harp sound. Resonance in the player is a much bigger factor.
Regardless of my belief, the player may still notice differences when playing harps with various comb materials.
I think vented or non vented covers is more important to player perception of sound than any possible comb resonance differences. I also believe that whatever makes the player feel good about the sound will improve playing and the sound, so if it works for you, great!
At the same SPAH I also bought two Blue Moon phenolic resin combs to install on Manjis and they DID make a big difference in playability, probably due to comb flatness.