Just a thought I've been having, but seeing as Bluetooth technology is featured in a lot of hi-fi headphones these days and its quality has improved quite significantly over the last decade, does it have a place in summit-fi? Do any existing ultra-high-end headphone products already feature HR...

I would like Sennheiser to bring back the HD540II or at least produce spare parts for it such as velour earpads, headband pad, headband, outer earcup shells or even complete replacement drivers so that existing units can be completely restored. However the wish of just one person is simply not...