Amazon.co.jp: Ferro Fluid System Silk Dome Tweeter Unit with 4 Holes Bezel, 1 inch (24 mm), 8 Ω/MAX30 W [Speaker DIY / DIY Audio] 1 Piece : Electronics
Dayton Audio ND25FW-4 1" Soft Dome Neodymium Tweeter with Waveguide 4 Ohm
Test Bench: Trueanalog TAFE28 Silk Dome Tweeter | audioXpress
What Is The Best Tweeter Material?
D-2801XL-M01 Dynavox, 1" Soft Dome Tweeter 100 Watt 6 Ohm | Farnell ES