Talking to dealers over in the UK for a number of years, the original Tyros was apparently outsold by the Technics KN7000 by 2 � 1.

Tyros 2 was ground breaking on its ease of use with articulation sounds, (Multi articulation had been out for years in the pro world but was always manually switched) and sold by the shed loads, with other manufactures just shaking their heads in disbelief.

Tyros 3 was a disaster sales wise (It was the only Tyros that flooded eBay shortly after its launch as users tried to get back their previous boards) as while it added SA2 sounds the OOTB experience was significantly inferior to the Tyros 2 it replaced, plus it also suffered from lack of processing power causing the Styles to stutter when using fistfuls of chords with large voices, (Only Yamaha diehards defended it) and is probably the reason it was replaced after 2 years rather than 3.

Tyros 4 just repeated Tyros 2 (And was really the true replacement for the Tyros 2) in that it left other manufactures trailing once more.

Tyros 5 is unknown at present, (Although pre-orders are large as with any new Tyros launch) but we will have to wait and see how it does. (Personally I think the ensemble voices let it down as while they sound great in professional demonstrators hands, they sound awful when played by normal home players, (Unlike SA voices) however I�m impressed with the new effects section which really brings it alive compared to previous models) S950 users say the S950 has the same, but to be quite honest I find the S910 to sound way better than the S950)

Bill