System Overview; Wavefront Precision Longbow; Mechanical Design; Acoustic Design - Martin Audio WPL User Manual

Optimised line array

Table of Contents

WPL USER GUIDE

System Overview

WPL is a three-way, bi-amp, large format line array element consisting of two 12" neodymium magnet low frequency drivers in a Hybrid®

confi guration, two 6.5" neodymium magnet mid frequency drivers, and four 1" neodymium magnet high frequency compression drivers

loaded by constant directivity waveguides. In conjunction with automated DISPLAY system design and VU-NET network control software

applications, WPL features scalable resolution for advanced array control, resulting in outstanding levels of consistent, high quality audio

that can be distributed to every point throughout the audience in a venue.

WPL is a new breed of large-format optimised line array which brings innovative acoustic design, ultra-high performance and coverage

consistency to a wider range of users, applications and budgets than previously possible. A three-way, bi-amp system, it features horn-

loaded low-frequency, mid and HF sections to raise effi ciency and increase output. Its high effi ciency acoustic design can equal or

outperform larger, direct radiator systems — a 12-box array will throw beyond 80 metres (200ft) and deliver impressive rock levels to a

8,000-seat venue, saving on truck space and weight.

WPL is designed mechanically to be an easy to handle, quick to rig, safe, rugged and stable touring loudspeaker. The cabinet is constructed

predominantly from high grade multi-laminate birch and poplar plywood, with an integral 3-point rigging system. Two side pocket handles

and two rear grip handles make handling safe and easy, and the cabinet is fi nished in black textured paint with a fabric-backed protective

steel grille.

The WPL's low frequency section consists of 2 x 12" (300mm) neodymium drivers in a Hybrid confi guration which marries the benefi ts of

horn and refl ex loading. Each driver is slot-loaded into a short horn to give a high sensitivity of 103dB @ 1m/2.83V, while the rear of the

driver is refl ex-loaded to extend the LF output. The punch and low-frequency extension produced from such a small enclosure volume are

remarkable.

Mid and HF horns are physically separate — a key factor in the WPL's exemplary 90° horizontal constant directivity dispersion pattern. The

midrange horn design utilises 2 x 6.5" (165mm) neodymium drivers to produce a high SPL of 134dB @ 1m/2.83V, while the HF section

employs 3 x 1" (25mm) exit neodymium compression drivers which feed three individual horns. Use of multiple small HF drivers instead

of a more traditionally-used large format compression driver results in less distortion and a more extended HF response.

WPL USER GUIDE V1.0

Table of Contents