Manuals / Electro-Voice / Home Audio / Speaker

Electro-Voice EVF-1181S, EVF-2121S, EVH-1152S, EVF-1152D Reducing Multiple-Source Interference

Models: EVH-1152S EVF-1152S EVF-1122S EVF-1122D EVF-1152D EVH-1152D EVF-1151S EVF-1181S EVF-1121S EVF-2121S EVF-2151D

1 56
Download 56 pages 48.16 Kb
Page 16
Image 16

3.0 Designing an EVF/EVH Cluster (cont’)

At higher frequencies, the interference patterns become more densely packed, which essentially elimi- nates their audibility. Figure 7 shows this effect at 8,000 Hz.

Figure 7:

Horizontal polar response (blue center plot) of two closely clustered 60° x 40° loudspeakers aimed 60° apart, showing multiple, densely packed off-axis nulls at 8,000 Hz caused by multiple-source interference (see text for more details)

3.51 Reducing Multiple-Source Interference

Multiple-source interference cannot be eliminated but it can be substantially reduced. Systems which have radiating devices large enough to hold their rated coverage angles down to relatively low frequen- cies, such as the horn-loaded EVH series that hold their coverage angles down to 500 Hz, will exhibit less interference in clusters. Also, doubling the distance between the two systems of Figure 8 produces multiple interference nulls which are more densely packed than those of Figure 6, reducing the audibility of the interference.

Figure 8:

Horizontal polar response (blue cen- ter plot) of two 60° x 40° loudspeakers aimed 60° apart but with double the distance between grille centers compared to Figures 6 and 7, showing the more densely packed 1,250-Hz off-axis nulls caused by multiple-source interference (see text for more details)

16

Electro-Voice EVF/EVH User Manual

Page 15 Page 17
Page 16
Image 16
Electro-Voice EVF-1181S, EVF-2121S, EVH-1152S, EVF-1152D, EVF-1122D, EVF-2151D, EVF-1122S Reducing Multiple-Source Interference
Page 15 Page 17

EVH-1152S, EVF-1152S, EVF-1122S, EVF-1122D, EVF-1152D specifications

Electro-Voice is renowned for its high-quality audio solutions, and the EVF series embodies this commitment. The EVF-2121S, EVF-1121S, EVF-1181S, EVF-1151S, and EVF-2151D are a collection of loudspeakers designed for a variety of professional audio applications, each with its distinctive features and capabilities that cater to different sound reinforcement needs.

The EVF-2121S is a dual-12-inch full-range speaker that combines exceptional power handling with a wide frequency response. It utilizes a coaxial driver arrangement, providing even sound distribution and a cohesive audio experience. This model is ideal for medium to large venues, offering a robust SPL (sound pressure level) output and clear reproduction of vocals and instruments.

In contrast, the EVF-1121S features a single 12-inch driver, delivering precise, high-impact sound suitable for smaller spaces. Its design emphasizes clarity and detail, making it perfect for live sound applications. The compact and lightweight design also ensures ease of transport and installation, appealing to mobile sound reinforcement professionals.

The EVF-1181S is a dedicated subwoofer that amplifies low frequencies, featuring an 18-inch woofer for deep, powerful bass response. Its extended low-frequency output enhances the overall sound experience, making it an ideal choice for high-energy music events and professional club environments. Designed with rugged construction and efficient power handling, the EVF-1181S is built to withstand demanding conditions while delivering reliable performance.

The EVF-1151S combines a 15-inch woofer with an advanced high-frequency driver for a full-range sound that works well in theatres, concert halls, and corporate events. The speaker ensures clear mid and high frequencies, maintaining vocal intelligibility even in challenging acoustic environments.

Lastly, the EVF-2151D is a dual 15-inch subwoofer that enhances overall system performance with its ability to produce deep bass. Its compact enclosure design allows for seamless integration into various sound setups, ensuring it can meet the needs of both portable and installed sound systems.

All models in the EVF series incorporate advanced technologies, including proprietary transducers and custom-engineered waveguides, which contribute to their impressive performance. With features like durable enclosures and efficient power handling, these loudspeakers are engineered to provide reliable sound reinforcement for both live and recorded applications. Whether it’s a concert, event, or installation project, the Electro-Voice EVF series stands out for its versatility and audio excellence.