I have the 450 model, and find it is not bad unless the cab area is closed up. Having a windshield and rear window makes cab noise much louder. For what it is worth, they are all loud when enclosed, I have a winter enclosure that makes things get really loud. Honestly I didnt think mine was that bad after riding in other brands of SxS. Keep in mind you arent driving a Caddy or a 20K machine like many out there today cost. They make a sound deadening material that self sticks in a matt form that is used for sound systems. I have it under my engine cover in my motorhome and it does help!! Many different brand names one is called dynomat, a thick rubver like material that has a sticky side, cut and stick down type material.