I find Hitec digital servos to be noisey in general when compared to other brand digitals. Airtronics is nice an quiet.
I have both the Aitronics that Mike sells and the Hitec. The Hitec is more noisy, but I found with the Hitec if you adjust your EPA to perfection it creates less "beeping". But the torque you get is by far worth the noise IMO!!!:027:
"if you've got something to say, say it peacefully"