Dublin church equipped with Electro-Voice
WORLD: A new sound system was recently installed in Dublin’s church of St John the Evangelist to improve the level of intelligibility and the acoustic coverage. The greatest challenge for the system designers, Sound Engineering by Design (SED), was posed by the room acoustics, as the reverberation time in the church had been measured at 2.9s. A further stipulation of the commission was that the loudspeakers should blend into the background and complement the architecture of the building.
To provide powerful and even coverage of the 15m x 20m congregation area, SED opted for a horizontal cluster of three EVH loudspeakers from the EV Innovation series flown centrally above the altar – a choice based on simulations of different locations and dispersion angles.
‘The EVH horns we installed are operated in full-range mode and have a tight 40 x 30-degree radiation pattern,’ said SED’s James Walsh. ‘The directionality of EVH horns is impressively precise – especially so at frequencies well below 1kHz – and the performance of the system corresponds exactly to the requirements of the building. In fact, despite the problematic acoustics, we have succeeded in achieving a high level of intelligibility.’
The installation here is rounded off by an Electro-Voice ZX1i loudspeaker alongside the altar, which provides sidefill for the choir. The system is driven by two Q1212 amplifiers from Electro-Voice and controlled by an EV DC-One system processor. ‘In view of the length of the reverberation time, we decided to introduce additional equalisation to optimise intelligibility,’ added Mr Walsh.
‘The response from the parish team and members of the congregation has been uniformly enthusiastic. In the past, everybody agreed that the church had one of the worst sound systems in the entire diocese. Now it has one of the best.’