GEO T Series

The GEO T4805 Vertical Tangent Array Module

Featuring a 2" exit compression driver (HF), two front-firing 8" long excursion neodymium cone drivers (MF/LF), and an additional pair of rear-firing 8" long excursion neodymium cone drivers (LF only), the T4805 extends NEXO’s unique Controlled Directivity LF to the midbass region. The T4805 has a 5° HRW which allows variable curvature in a vertical coupling plane, adjustable in logarithmic steps from 0.125° to 5° with 0.01° precision. The system makes highly efficient use of amplifier power, with minimal cabling losses due to 32 Ohm impedance.

User Benefit

The GEO T4805 is a 3-way device which provides cardioid midbass using four long excursion high output neodymium 8" cone drivers. Cardioid midbass improves control of long wavelengths in both the horizontal and vertical planes and allows shorter arrays to project low frequency energy as effectively as the higher frequencies. With Nexo's NX241 digital controller generating a 90° x 90° cardioid pattern from 70 to 250 Hz, the T Series can control low frequencies with shorter lines than array modules based on horizontally spaced pairs of large-diaphragm cones.

The GEO T2820 Vertical/Horizontal Tangent Array Module

Featuring a 2” exit compression driver (HF) and two 8” long excursion neodymium cone drivers (MF). The T2820 has a HRW with a 20° curvature in a vertical or horizontal coupling plane, adjustable from 8° to 20°. The GEO T2820’s CDD™ (Configurable Directivity Device™) provides 120° dispersion in the non-coupling plane, enhancing its effectiveness as a downfill element in curved vertical tangent arrays.

User Benefit:

The GEO HRW is the only dispersion control device that allows the array designer to vary the curvature of vertical arrays in inverse proportion to distance without compromising coherent coupling. This allows the imaging and definition to be as clear in the front rows as at the rear of the audience area.

The CD18 Subbass

The CD12 developed for the GEO S Series introduced NEXO’s unique Controlled Directivity Subbass. The new CD18 extends cardioid directional control to 31.5 Hz, thanks to its dual 18 inch woofers and the DSP algorithms of the Nexo NX241 digital controller. CD18s can be flown or stacked.

GEO T Flying Hardware

The GEO T system is very compact and lightweight compared to other high output line arrays. Designed from the start to be safe and easy to fly, the system incorporates Vertical Tangent Array top and bottom bumpers, which allow adjustment of the tilt angle and curvature of vertical tangent arrays using a two-motor chain hoist system. All GEO T hardware is designed and tested to maintain high load safety factors in curved vertical arrays, which introduce very high stress factors due to the change in angle from the vertical.

GEOSoft Array Design Software

GEOSoft is not just a simple spreadsheet of “aiming angles,” but a compiled MatLab application for the design of curved vertical arrays. This provides a fast user interface to the modeling software used by NEXO R&D in product development. Predictions have been verified by field measurements.