Feb 11, 2011 at 7:58 PM Thread Starter Post #1 of 2 cactus_farmer 1000+ Head-Fier Joined Feb 12, 2008 Posts 1,127 Likes 113 As title says, in mm. Just curious to know....
Feb 11, 2011 at 8:23 PM Post #2 of 2 Nagasaki_Kid 500+ Head-Fier Joined Jun 14, 2007 Posts 907 Likes 18 the er4 uses a Knowles ED-29689 driver http://www.mouser.com/ProductDetail/Knowles-Acoustics/ED-29689-000/?qs=3unH/Dqlvl8HwvqJLEd4Rg%3D%3D http://parts.digikey.com/1/parts/977-speaker-z-3-3o-ohms-port-end-ed-29689-000.html
the er4 uses a Knowles ED-29689 driver http://www.mouser.com/ProductDetail/Knowles-Acoustics/ED-29689-000/?qs=3unH/Dqlvl8HwvqJLEd4Rg%3D%3D http://parts.digikey.com/1/parts/977-speaker-z-3-3o-ohms-port-end-ed-29689-000.html