Alexander EttlDevelopment Engineer (Mechatronics)
Wave Cardboard Loudspeaker

Wave

A one-week material workshop at THD: design and build a cardboard housing for an existing loudspeaker driver. The whole housing is a single wave-shaped profile, repeated as parallel cardboard strips glued edge to edge, with no separate frame. Where the strips fan out at the front, the gaps between them double as the grille, an acoustic opening with the driver visible behind it as a dark circle.

The outer shell protects the driver and gives it a shape worth having on a shelf, at a 200 × 200 × 300 mm footprint. The real amplification happens in a second part underneath: a folded cardboard horn, not an electronic part at all but the same passive trick century-old horn speakers used to get loud without any power. The working prototype was presented on its stand, cut and assembled inside the one-week workshop window: two parts, no added electronics, and still noticeably louder.

One curve, cut as parallel strips
Strips as acoustic grille
Two parts: a housing, and a horn
Built, not just rendered
Wave
One curve, cut as parallel strips

Strips as acoustic grille

Two parts: a housing, and a horn

Built, not just rendered

At a glance

Context
Material workshop, THD
Period
29 Apr – 7 May 2023 · one week
Role
Solo project (a workshop at THD), supervised by Philip Andris.
Disciplines
Industrial design
Evidence
a built prototype and manufacturing process

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