General Product Description

The EVX-180B low-frequency transducer is designed for professional sound reinforcement or studio monitoring applications that require maximum output with low distortion.

The EVX-180B woofer provides unprecedented power capacity, linearity and excursion, made possible by the HeatWick® total-thermal-engineering design. The proprietary HeatWick design actually “wicks” heat away from the voice coil, significantly increasing power handling and long-term reliability. A special frame extension and elongated pole piece provide a metal surface with close proximity to the entire length of the voice coil, providing a major heat-transfer path. Also, the 100-mm (4-in.) diameter voice coil is longer than conventional medium efficiency woofers to give additional power handling and virtually eliminate dynamic-range power compression.

Additionally, a Flux Demodulation Device (FDD™) reduces distortion in the critical mid-band by providing a “short circuit” effect to prevent amplifier-signal modulation of the static magnetic field.

A ribbed, Kevlar® fiber composite cone with an extremely high stiffness-to-weight ratio and exceptional strength gives the EVX-180B increased resistance to cone collapse and deformation, without sacrificing efficiency.

Architects’ and Engineers’ Specifications

The low-frequency transducer shall have a nominal diameter of 460

mm(18 in.), overall depth not greater than 198 mm (7.92 in.), and weigh no more than 11 kg (25 lb).The frame shall be made of die-cast aluminum to resist deformation. The magnetic assembly shall have an extended pole piece to reduce inductive variances with excursion, and provide a symmetrical magnetic field at the voice-coil gap. Two aluminum rings shall encircle the pole piece above and below the magnetic gap, and shall have internal diameters concentric with the internal diameter of the steel top plate. The upper ring shall be part of the loudspeaker frame. Both rings act to reduce flux modulation and provide a heat transfer path from the outer diameter of the voice coil.

The voice coil shall be 100 mm (4 in.) in diameter and 20 mm (0.8 in.) in winding length, and shall be made of edge-wound aluminum ribbon. When centered in the magnetic gap, the voice coil shall produce a force of not less than 21.9 newtons (tesla-ampere-meters) with a dc current of 1 ampere. Performance specifications of a typical production unit shall be as follows: measured sensitivity (SPL at 1 m (3.3 ft) with 1-watt input, 100 to 800 Hz pink noise) shall be at least 96 dB. The half-space reference efficiency shall be at least 3.0%. The usable frequency response shall be 20 Hz to 2,000 Hz, and the nominal impedance shall be 8 ohms. The rated power for the loudspeaker shall be 1,000 watts continuous power.

The low-frequency transducer shall be the Electro- Voice® EVX-180B.

Directional Characteristics

The directional characteristics of the EVX-180B in the TL3512 256-liter (9-ft³) vented enclosure were measured by running a set of polar responses in EV’s large anechoic chamber. The test signal was octave-band-limited pseudo-random pink noise centered at the ISO standard frequencies.

EVX-180B

18 Inch Low-Frequency

Reproducer

The curves show horizontal (side-to-side) dispersion when the enclosure’s long axis is vertical. The vertical (up-and-down) polar responses deviate only slightly from the horizontal responses due to box geometry.Typical data is provided in Figures 1 and 2, which indicate 6-dB-down beamwidth versus frequency and directivity factor, respectively, for an EVX-180B in the TL3512 enclosure.

Electrical Connections

The EVX-180B is fitted with a pair of chrome-plated, frame-mounted connectors with color-coded ends. Electrical connection is made by pushing down, inserting wire completely through the rectangular slot and releasing pressure. One conductor of #9 AWG stranded, #8 AWG solid, a pair of twisted #15 AWG stranded or a pair of #14 AWG solid conductors will fit. A positive electrical signal applied to the red (+) terminal will displace the cone away from the magnet, thus producing a positive acoustic pressure.

Recommended Enclosures

The most extended bass, lowest distortion and best control is usually realized in properly designed vented enclosures. In such designs, the vent, or port, actually provides the lowest octave of output. The vent is driven to full acoustic output by a relatively small motion of the speaker cone itself, acting through the air contained within the enclosure. The excursion of the EVX-180B at these frequencies is much reduced compared to sealed or open-back enclosures, directly reducing harmonic distortion and the possibility of speaker “bottoming.”The maximum output is limited by either: (1) the long-term thermal power-handling capacity or (2) the speaker’s maximum cone-excursion capability, whichever occurs first.-excursion capability, whichever occurs first.

Figure 1. Beamwidth vs. Frequency

Page 2
Page 1
Image 1
Electro-Voice EVX-180B specifications General Product Description, Architects’ and Engineers’ Specifications
Page 2

EVX-180B specifications

The Electro-Voice EVX-180B is a high-performance 18-inch subwoofer driver renowned for its exceptional power handling, low-frequency response, and overall sound quality. It is designed primarily for professional audio applications, including live sound reinforcement, club installations, and high-end audio systems. The EVX-180B embodies Electro-Voice's commitment to innovation and quality in professional audio engineering.

One of the main features of the EVX-180B is its robust construction, designed to withstand the rigors of high-output environments. The driver boasts a high-temperature voice coil, capable of handling up to 1200 watts of continuous power and 4800 watts of peak power, ensuring it can deliver punchy bass without distortion. Its heavy-duty cone and reinforced structure enhance its durability while minimizing unwanted vibrations.

The EVX-180B utilizes advanced magnet technology, employing a high-efficiency Neodymium magnet system that reduces weight and improves sensitivity. This design allows for a deeper and more powerful bass response, delivering frequencies as low as 25 Hz with remarkable clarity. The driver’s frequency response range is optimized for sub-bass frequencies, ensuring that it performs exceptionally well in both music and sound reinforcement applications.

Additionally, the EVX-180B features a unique suspension design that enhances its linearity and transient response. This characteristic enables the subwoofer to reproduce fast, accurate bass lines without blurring or muddling the sound. Its large-diameter voice coil and high-excursion capabilities contribute to its impressive low-end performance, making it a suitable choice for genres that demand powerful bass reproduction, like electronic dance music and hip-hop.

The Electro-Voice EVX-180B also incorporates a specialized cooling system to dissipate heat effectively, further enhancing its reliability during extended use. This feature is critical in maintaining performance consistency, especially in demanding environments.

In summary, the Electro-Voice EVX-180B is a formidable choice for audio professionals seeking a powerful, reliable, and high-performance subwoofer driver. Its combination of robust construction, innovative magnet technology, and exceptional bass response makes it a leading option in the market for low-frequency sound reproduction. Its versatility and durability ensure it performs well in a variety of settings, solidifying its reputation as a go-to subwoofer driver for those who demand the best in audio quality.
Top Page Image Contents