Hello Everyone! I have been given these as a gift from a friend in the USA. They are finally over here after ages. I am a very keen headphone listener and have had quite a few over the years. I have always been fascinated about surround sound via headphones and checked virtually all the technologies out there and despite being open minded - I really have to say that nearly all including the very expensive ones were basically all CRAP. Firstly I was waiting ages for someone to make a decent sounding wireless headset. I waited years. Again. most were average or crap and certainly nowhere near a decent set of corded phones. So trying to find a set that was both wireless and that could do proper Surround Sound - I had finally convinced myself would never happen. Finally, although in the past, I have had a pair of decent Yamaha headphones - I really do not believe that major Japenese manufacturers make decent headphones for the money. I now have to eat humble pie. The Pioneer SE-DIR 800C changes everything. And I mean EVERYTHING. Firstly, they are the VERY BEST sounding WIRELESS sets I have heard. NO noise, or intereference of any kind, crystal clear, very clean, detailed and very, very good bass. they blew my socks off to be honest. I expected them to be crap like everything else and not being a fan of Jap headphones - I was really surprised. Now, it gets even better. The headphones come with a base unit that decodes Dolby Pro Logic, Pro Logic II, Dolby Digital, Dolby Headphone (3 modes) and DTS. The unit can be hooked up via optical cable, co-axial cable or via analogue to audio outputs to your amp, dvd, tv or vcr. BIG QUESTION - Does it work?? Well, they blow away any other so called surround sound headphones and YES!! They work!! You really do get Surround Sound - pretty amazing. You hear sounds behind you, detailed rear effects, great panning effects, you can locate sounds distinctively, hear background nuances and get a great sense of depth and dimension to the sound. Trust me, this is better than anything I have have previously heard. The base unit is very attractive and has a slot for recharging the batteries. The headphones themselves are very comfortable and light and do not pressure your head after a while like some others. They are nicely finished but a bit plasticky. The only criticism I have, is that it would have been great if they came with a remote control as then one could switch between the various modes without having to get up! As mine were from the States, I had to get a voltage transformer but they seem to work fine with it as Pioneer insist that you only use the supplied ac adaptor as any other including ones with the same milliamp rating will possibly damage the unit. But if you buy from the UK, you will not have to worry about it. I had experienced both the expensive Sony systems in the past, and frankly they were a waste of time and in reality I expected someone like Sennhesser to introduce a decent wireless set and one that did proper surround sound. Is it as good as a normal surround sound set up? No, as nothing will beat that, but, this is the best thing you will get next to it by a long shot. Nothing else, in my opinion comes close. Just get yourself movies like Star Wars, Star trek, Gladiator, Das Boot, Pearl Harbor etc and you will see what I mean! Only problem is they are not cheap - around £400!! but I have heard some places sell them for nearer £200 and for that they are a bargain! Even in the States, they reatil for $400! Finally, remember, you get acclimatised to what you hear and when you switch back to normal stereo from a surround mode, you realise what you miss out on! I hope this helps! I would love to hear others views on this if they have experienced them! Best Regards, Suave! PS: For those who are interested, my friend bought these from a company called DataVision for $269.00!!! Only problem is that due to credit card regs, they will not ship outside the USA, but if you are going there or have a friend, maybe they can pick up a set - only problem is, you will have had to buy them before trying them out! There may be customs duties and tax due to our Nazi tax laws so you take a chance. Many people have bought from a company called audiocubes that supply a free transformer and they have a couple of reviews on this headset as well and their customers in the UK have stated they did not pay any import duties or taxes, but the price is about $390 + shipping. Apparently the service is great. They also have reviews on the older SE-DIR1000C as well as this newer model. There is great review of the 800C's on Head Fi as well.