Siemens Klangfilm 6 Ruf Lsp 28a (4", AlNiCo / VAC Berlin) Tweeter, 1952, made in Germany

 

Link: clipx

Is a wonderful performance that can be played from 2kHz or less to 20kHz. The output of the voice coil error or 304 is about 2 dB lower, but it is an error that cannot be detected when listening with the ear.

VAC - Vacuumschmerze AG

Frequency range: 2kHz to 20kHz

Depth T=55 mm

Dimensions 120 mm Ø

Pitch diameter 110 mm Ø

Cone: 90 mm Ø

Moving Coil ca. 4 (5) Ω Impedanz

Weight: 200g / pcs