i'm not an engineer so I'm not qualified to evaluate what is or is not necessary weight-wise to build a quality kb, and i appreciate Domenik's explanation of why he feels he has no choice but to make it how he makes it. if that is what he considers most desirable and what his clients consider most desirable, so be it. However, the necessary weight is still a problem for most of us and will always be. That needs to be acknowledged, not disparaged, and to understand that in today's world of advanced plastics and miniaturization and electronic sophistication, a product that needs to be heavier to get better will always be just a niche product. Calling the competition "home" units is not only insulting, it is patently untrue. Also remember that most users are not on any forum, and i'll bet half of the working keyboard players out there are playing gigs on much older yammies and casios. I see a lot of casios on duo/trio gigs. The guys i know who use them sound great on them, because they have some good sounds and the players are veterans who are not into equipment research and not into spending money if their basic need is filled.
If those are therefore not "home" units, then certainly the mid to top of line yammies, rolands, korgs are not either.
As i said earlier on, it's the heavies that tend to stay in the home studio, so let's stop the "home" pissing contest, OK?

As I also said earlier, a good quality synth action is far more desirable in terms of expressing all of the sounds, organs included, than semi-weighted, so why not let the piano-action dependent guys have a heavier 88-model option or let them use a separate 88 of their choice as controller? why not save the rest of us the 7kg(15.4 lb!) difference? Also, can the power supply not be outside the unit on the cord as Yamaha has done until recently? That
saves a lot of liftweight. I'm sure that there could be other
modifications to convert from metal/wood to strong plastic materials. The bugaboos that are raised about "solid" vs "flimsy" construction are just marketing tools, I'm afraid..they have little real validity for most players.
People will always justify that their Hummer is built like a tank. That's great, if you need a tank. I don't.

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Miami Mo