I bought the realistic LV-1's for parts, but they turned out to be fully operational when I got them, and I hate to take apart a working headphone if it's not necessary. They just have a very different sound to them. The realistic version has less metal -- the driver cups are all plastic, instead of a mix of metal and plastic. Maybe that's why they sound different. Or maybe it's the wiring, maybe one of them is a little corroded or something. I dunno, I just know I like the HV/1's sound significantly more... full. Like there's more there, like it's bigger and wider than the LV-1. Charles.