You can contact Yamaha by phone at 714.522.9000
If you prefer you can go to contact us online, go to:
http://usa.yamaha.com/support/contact/keyboards_digitalpianos/This is a support contact, not a marketing contact. The folks in marketing don't take calls from consumers. But we are happy to forward your comments. Just so you know, the product manager is on this site, as we as several others, most every day.
Regards,
Steve