For more proposals and modifications please see "Neue Bauvorschläge und Modifikationen" (only in German).

By Friedemann Hausdorf,

160 pages, 6th revised edition.

This manual explains in an easily understandable manner the key aspects of loudspeaker technology, provides formulae for simple calculations with examples, offers numerous instructions and practical hints for building one's own high-quality loudspeakers.

Apart from behind-the-scenes details about how professional crossovers are designed, explanations are also given of how DIY enthusiasts can use computer-based simulators to develop their own loudspeakers.

Some of the contents:

- The physics of sound- Loudspeakers driver fundamentals- Technical data and measuring methods- Sound distortion- Combined speaker systems- Transmission types (enclosed, bass reflex, bandpass, TL, horn)- Crossovers- Building speaker cabinets(only in German language available)

33 cm spherical loudspeaker as bass reflex system. Equipped with one 17 cm bass/midrange and four midrange/highrange drivers which have a good directivity pattern at off-axis angles and therefore provide a uniform and pleasant sound quality. The KL 33 can be connected to a 100 V network or a normal amplifier (4 ohm).