In my opinion, the CTK-671 is the biggest bargain in our industry. I got my first ones in a few weeks ago and after playing it for a few hours I was blown away. I agree that the only thing missing from this keyboard is a pitch and mod wheel.
Did you know that you can program all the parameters of the DSP effect processor. This means I can even have a slow to fast rotary speaker leslie when playing the Jazz Organ sound in real time, just like the more expensive Yamaha and other keyboards. Did you know that just like the more expensive keyboards, I can split and layer and sounds I want and I can change their volumes, pans, octaves, effects sends and save them in 16 registration memories. The major difference I see in the WK 1630 and WK 1800 is that i have no control over editing the dsp effects and because of this the sounds called advanced sounds are so much better. Also, the sounds have much more dynamic filtering being used so like much more expensive keyboards, the CTK 671 has a much more realisitic sound. And the amazing thing.......$199.00. Unbelievable!!!!!!!!!!
George Kaye
Kaye's Music Scene
Reseda, California