Realistic extended range reproduction from 25 Hz up to 2,500 Hz from a single driver.  High efficiency design with less than 0.3% distortion measured on an IEC soundboard at a distance of 100 cm. The pole pieces are manufactured to the closest tolerances to allow true magnetic symmetry for the underhung voice coil.  Gap geometry is optimized. The pole pieces are manufactured from ≥99.85% pure iron stock. The NAWI paper cone has a soft suspension and the dustcap is vented. The field-coil has exceptionally low resistance and is designed for use with a current source.

Frequency response = 25 – 2,500 Hz
Power handling = 75 Watts
Sensitivity = 97 dB @ 1W/1m
Diaphragm = driven by a 76 mm diameter voice coil on treated paper former
Flux density = 16,000 Gauss @ 3.5 A
Net weight = 14.8 kG
Diameter = 385 mm (406 mm)
Mounting hole diameter = Standard 370 mm 8 bolt mounting circle
Voice coil impedance = 8 and 16 Ohms
Resonance frequency = 20 Hz

A1.Classic standard design

Different frames and voice-coils with 8 and 16 ohms impedance are available on request.

A1. Classic different cones, voice coils and frames available

Different cones, suspensions and voice coil wires are available.

A1.Classic – modern field coil speaker for vintage enclosures

Subject to changes/modifications without notice.

Christine von Langa - Roedlas 54 - D - 91077 Neunkirchen a. Br. - Phone +49 (0)9192 996926 - E-Mail: listen(at)wolfvonlanga.com -
WOLFVONLANGA produces unique field coil loudspeakers and drive units. As a manufacturer we solely use the highest quality materials.
We deliver worldwide unique loudspeaker technology. All WOLFVONLANGA products are developed and handmade in Germany.
WOLFVONLANGA is a registered trademark.