Electro-Voice
The Electro-Voice® MH4020AC is a wide-range, 40 degree x 20 degree, mid-bass/high-freque
ncy, Constant Directivity, horn-and-driver system that uses Ring-Mode Decoupling (RMD). With a contractor-installed
, high-frequency driver, it covers a 100 Hz to 20,000 Hz range with minimal equalization. The MH4020AC combines two pioneering EV concepts: Constant Directivity horns and Manifold Technology®. The MH4020AC's high acoustic output, stable directional characteristics, and extended low-frequency performance make it perfect for music and speech reinforcement in large indoor and outdoor venues. At the heart of the MH4020AC are four DL10X-SH 10-inch, water-resistant drivers (U.S. patent no. 4,547,632). The drivers have been specially developed for MH Series horns, and feature diaphragms constructed from Kevlar® and epoxy. This combination of materials produces a diaphragm with a strength-to-weight ratio twice that of conventional materials. Each driver is integrally mounted to the fiberglass horn bell via a heavy-duty mounting bracket and proprietary Aperiodic Enhancer phase plug (U.S. patent no. 4,718,517). The Aperiodic Enhancer is responsible for the extended, high-frequency response of the MH4020AC's mid-band section. The horn automatically adjusts the acoustic loading to maximize acoustic output because the Aperiodic Enhancer makes use of the fact that only the apex of the cone (near the voice coil) is in motion at higher frequencies. Manifolding allows the summing of two or more driver outputs without interference in the band-pass. Manifolding also reduces distortion and increases efficiency at certain frequencies. There is also redundancy built into the system; in the unlikely event of a driver failure, one remains available. The DLX10-SH drivers are contained and sealed within fiberglass covers, and optimally tuned for maximum, low-end performance and displacement control. Frequencies above 1,600 Hz are handled by the EV HP420A Constant Directivity horn and a contractor-selected and installed high-frequency, compression driver. Kevlar® is a registered trademark of DuPont.
Constant-Directivity Manifold Technology® Horn system with 40° X 20° coverage pattern
Ring-Mode Decoupling (RMD) technology for outstanding intelligibility and clarity
Includes four DL10X-SH, 10 inch midrange RMD drivers
Includes HP420A high-frequency horn and mounting bracket
Use EV Neodymium or Ferrite HF drivers, single or manifolded (HF drivers sold separately)
Excellent response down to 100 Hz, eliminates supplemental low frequency systems in many applications
Large mouth provides high directivity at low frequencies"
Electro-Voice
The Electro-Voice® MH4020AC is a wide-range, 40 degree x 20 degree, mid-bass/high-frequency, Constant Directivity, horn-and-driver system that uses Ring-Mode Decoupling (RMD™). With a contractor-installed, high-frequency driver, it covers a 100 Hz to 20,000 Hz range with minimal equalization. The MH4020AC combines two pioneering EV concepts: Constant Directivity horns and Manifold Technology®. The MH4020AC's high acoustic output, stable directional characteristics, and extended low-frequency performance make it perfect for music and speech reinforcement in large indoor and outdoor venues. At the heart of the MH4020AC are four DL10X-SH 10-inch, water-resistant drivers (U.S. patent no. 4,547,632). The drivers have been specially developed for MH Series horns, and feature diaphragms constructed from Kevlar® and epoxy. This combination of materials produces a diaphragm with a strength-to-weight ratio twice that of conventional materials. Each driver is integrally mounted to the fiberglass horn bell via a heavy-duty mounting bracket and proprietary Aperiodic Enhancer™ phase plug (U.S. patent no. 4,718,517). The Aperiodic Enhancer™ is responsible for the extended, high-frequency response of the MH4020AC's mid-band section. The horn automatically adjusts the acoustic loading to maximize acoustic output because the Aperiodic Enhancer™ makes use of the fact that only the apex of the cone (near the voice coil) is in motion at higher frequencies. Manifolding allows the summing of two or more driver outputs without interference in the band-pass. Manifolding also reduces distortion and increases efficiency at certain frequencies. There is also redundancy built into the system; in the unlikely event of a driver failure, one remains available. The DLX10-SH drivers are contained and sealed within fiberglass covers, and optimally tuned for maximum, low-end performance and displacement control. Frequencies above 1,600 Hz are handled by the EV HP420A Constant Directivity horn and a contractor-selected and installed high-frequency, compression driver. Kevlar® is a registered trademark of DuPont.
- Constant-Directivity Manifold Technology® Horn system with 40° X 20° coverage pattern
- Ring-Mode Decoupling (RMD™) technology for outstanding intelligibility and clarity
- Includes four DL10X-SH, 10 inch midrange RMD™ drivers
- Includes HP420A high-frequency horn and mounting bracket
- Use EV Neodymium or Ferrite HF drivers, single or manifolded (HF drivers sold separately)
- Excellent response down to 100 Hz, eliminates supplemental low frequency systems in many applications
- Large mouth provides high directivity at low frequencies"
