The speakers for sonification / listening up were hung on Building 54 by a Boston-based professional hanging crew, NE Cleaners.  Speaker hanging took place over a span of 4 days with approximately 12 people involved.  Each speaker unit and bracket assembly weighed approximately 70 lbs. and needed to be assembled at the base of the building and then brought up by elevator to Building 54’s rooftop area.  Speakers and assemblies were then lowered in place on the building’s facade and fastened across six attachment points between bracket and facade structure.
 
Speaker bracket assemblies were fabricated by Peter Morley and the MIT Central Machine Shop over a period of 4 months that included several modifications of clamping devices, locking mechanisms, and overall design structure.  The initial design and 3-d models were made by Axel Roesler.  
 
Hanging and designing the speakers and assemblies proved to be one of the most challenging aspects of the project.  Early design approaches did not satisfy safety concerns and an approach that required a temporary attachment of the speakers to the building was necessary.  Attaching such large speakers to Building 54’s facade was no small feat!  In the early design stages we found that the wind force on Building 54 was so significant due to a wind channel coming off of the Charles River.  Speaker assemblies needed to sustain wind forces in all directions.  
 
7500 ft of speaker cable was used for wiring the speakers for sound and 4340 ft of steel cable was used for speaker safety hanging.
 
35 channels of sound were delivered from multi-channel recordings on DVD audio and powered by amplifiers that were located on Building 54’s rooftop.  The MIT Radio Club generously donated space and electricity to house the equipment.
process/hanging
early design concept
early design concept
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