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Fohhn steerable line arrays deployed in Ruprecht-Karls University

James McGrath 13 August 2012
Fohhn steerable line arrays deployed in Ruprecht-Karls University

Fohhn Audio has supplied a range of loudspeaker systems, including its flagship Linea Focus electronically steerable line arrays, for a series of installations at the historic Ruprecht-Karls University in Heidelberg, Germany.  One of the world’s oldest universities, Heidelberg celebrated its 625th Anniversary during 2011, an event that was preceded by a multi-million euro programme of renovation and refurbishment over a one-and-a-half year period. The Neue Aula hall, has been equipped with the Linea Focus LFI-220 electronically steerable active line array systems. Mounted on special brackets to the left and right of an illuminated panel structure on the front wall, each loudspeaker contains 16 integrated 4in neodymium speakers, Class D amplifiers and separate DSP channels. The speakers’ beam characteristics have been set to directly target the audience and avoid reflections from the back-lit ceiling panels and walls.  Bass for the system arrives from four Fohhn AS-20 subwoofers (containing 12in long excursion drivers). In addition, two Linea AL-150 column speakers have been installed as a delay line, providing additional coverage of the balcony area. Powering these and the subwoofers are Fohhn D-2.750 amplifiers. The amplifiers’ integrated DSP technology and audio tools (including 10-band parametric EQ, delay, cross-over and compressor/limiter) used in combination with Fohhn’s remote networking technology, are designed to guarantee highly accurate speaker set-up and coverage of the required areas. In Hörsaal 13, a general-purpose 420-seater lecture theatre, two Linea Focus LFI-220 systems and an XS-30 active subwoofer have been installed. The line arrays have been wall-mounted at the front of the room, either side of a projection screen. Using the loudspeakers’ beam-steering capabilities, an asymmetrical beam setting has been selected to provide direct and balanced coverage from front to back in the reverberant room with tiered seating. With the speakers positioned behind a microphone, the beam setting has also enabled potential feedback issues to be avoided.  In a second smaller lecture theatre with less challenging acoustics, two Linea LX-150 loudspeakers have been mounted on side walls towards the front of the room. These are powered by LX-150 systems are powered by a Fohhn 2-channel D-2.750 DSP amplifier. www.fohhn.com 

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