Hmm, I love music as much as the next guy/gal (listening to a CD now, on a very good audio system), but I'm stuck with using an MP-3 player (the compact kind one wears at a gym or similar) and noise reducing headphones while on my tractor. I realize that your speakers, installed very well, are inside a cab - me, I'm in SC and only have a ROPS for mounting stuff. What is the ambient noise level in your cab - my
L3410 runs about 80 db at idle, without a cab, much more when I rev up. At 85 db in a commercial setting one is supposed to have yearly hearing tests, and at 90 db a mandatory hearing conservation program (hearing protectors). I don't want to be a "stick in the mud", but when you combine the hearing loss that creeps up naturally with ageing to that of noise exposure, there's a huge number of our 60 plus year old peers who can't hear well at normal conversational levels, and are more or less clueless trying to follow conversations in noisy environments, such as a family gathering.
Without getting extreme about it, protect your hearing when it's easy to do so (yup, I don't use earplugs when hunting - heck 1 shot from my 7mm is all I usually need, and admittedly they "ring" for a bit, but my hearing loss isn't much, yet). It's worthwhile, and there's no good substitute.