Renovation and transformation of the stage of the Winterthur concert hall, by the hand of Gottfried Semper. Historic landmark building dating from 1865.

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Location   Winterthur, Switzerland. Historic landmark building.

Project Cost   1.5 million CHF (approximately 1 million €).

Time Frame   Evaluation and recommendations 2002, implementation of first phase of acoustics improvements in 2003 and 2004, implementation of second phase of acoustic improvements in 2009.

Owner   Stadt Winterthur, and Musikkollegium (Orchestra of the City).

Architect(s)   Johann Frei, Johann Frei Architekturbüro, Winterthur.

Seat Count   900-seat chamber orchestra hall. Total area 700 m².

Uses   Concert hall for the Musikkollegium Winterthur, chamber orchestra, symphony orchestra concerts as well as chamber music and recitals.

Services   Evaluation of existing condition, proposal for acoustical improvements for on-stage acoustics, implementation of acoustical improvements, post-opening services.

Team   Eckhard Kahle, Kahle Acoustics.