Thanks for the suggestion
For the purpose of solely reducing volume, do you think this item would be suitable?
I am using a different headphone than an Etymotic though
I don't recommend the adapters made by "wemakeamp." They had bad build quality, sometimes the channels were imbalanced, there was static, or the sound collapsed into mono. Look for the ones made by the eBay seller "awwan." They are more expensive, but I never had any issues like that with them.
It doesn't matter, Etymotic or not.