I was browsing some head units that are sale at the moment and came across a couple of Pioneer models that are claiming 4 x 100W output, namely the DEH-4800FD (CD player) and MVH-280FD (mechless). There doesn't seem to be much info on them and they're not available in many places here in the UK from the looks of it. There's some Russian videos on youtube with these models but hard to tell if there's actually any improvement over standard 4 x 50W models. I'm not expecting the claims to be 100% accurate but it would be interesting to know if there's any benefit at all. I believe Sony do a couple of these models too and that they use the same design internally. Has anybody had any experience with these? Would be interesting as they're not that expensive and could bridge the gap between having a regular head unit or having one with an amp installed.