Originally Posted by
phisher
D.D.S. means Direct Digital System and is something that was released with the EX-10 Eurus. It is a much faster signal processing system but requires the use of a D.D.S. compatible receiver and digital servos. With those you can except a 30% increase in response time.
KR-210S, KR-407S, KR-409S are the same speed. The difference is KR-409S uses an user replaceable coxial cable for antenna to improve reception. The KR-210S is 2 channels.
I emailed kopropo before but can't seem to find the email now.