Knowles SWFK (super-tweeter)
We have a surplus of SWFK-31736 armatures for sale.
The SWFK has unsurpassed high frequency performance, extending to 40kHz. These are the key to building a wide and expansive soundstage.
Combine these with a 1500Ω damper at 5mm depth and you'll get 5kHz+ performance that is, in our opinion, unmatched by any other armature.
Note: These MUST be used alongside a good woofer and mid driver in a custom arrangement. You may be required to design a custom crossover. For experienced builders only.