Bose SMS118 Manual de utilização e aplicação - Página 8

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Recommended Signal Processing for Permanent Installations

The Bose PowerMatch PM8500N power amplifier (sold separately) is easily configured to provide the recommended

amplifier power for ShowMatch modules and arrays. The PM8500N also provides presets for all recommended signal

processing, including active crossover, EQ, alignment delay, protection limiting, array compensation EQ settings, and

cardioid subwoofer settings when used with the ShowMatch SMS118 subwoofer.

Presets may be selected from either the front panel of the PM8500N or through the ControlSpace Designer software.

From the front panel interface select Menu > DSP > Speaker Presets > ShowMatch to access the loudspeaker preset

library for ShowMatch systems.

Within ControlSpace Designer, while connected to the amplifier via either USB or Ethernet, loudspeaker presets are

applied within the loudspeaker processing block of the output processing section for the desired channel.

1) Open the SpeakerPEQ block for the channel where the preset EQ will be applied

2) Select Load Loudspeaker EQ

3) Navigate to the ShowMatch directory to access the ShowMatch system presets.

ShowMatch systems utilize two preset components, a low frequency section, and a high frequency section. When

working with ControlSpace Designer or the front panel interface of the PowerMatch amplifier you will need to load the

preset for each section, (LF or HF), separately.

For additional information on system presets see Section 6.2, ShowMatch System Presets in this guide.

DESIGNING SHOWMATCH SYSTEMS

System Concept

ShowMatch systems feature next-generation array technology to deliver the scalability and flexibility needed to support

live music reproduction in a variety of venue shapes and sizes. Each ShowMatch array module includes two eight-inch

high-power neodymium woofers and four proprietary EMB2-S compression drivers capable of delivering array output

up to 145 dB SPL

Available in three vertical angles of 5, 10 and 20-degrees, each ShowMatch array module features changeable horizontal

waveguides that can be preconfigured to create both standard and DeltaQ line arrays.

DeltaQ line arrays provide consistent coverage and tonality across the coverage area by utilizing loudspeaker directivity,

Q, rather than electronic gain and module splay angles. This concept is particularly useful in installed applications where

the system designer's intent is to fine tune the coverage of the array to the shape of the audience area. Optimizing

the coverage of the array further improves performance by reducing unwanted room reflections which cause an

inconsistent response and drive reverberation, reducing both speech and musical clarity.

ShowMatch array modules are offered in three vertical and four horizontal coverage patterns which can be configured

as shown in the following table:

SM5

SM10

SM20

Using the various module configurations, it is possible to create a system design which focuses the energy on the

audience and minimizes the energy placed on side walls. The following illustration compares a ShowMatch DeltaQ line

array to a traditional line array comprised of modules which use the same vertical and horizontal angle.

Traditional Line Array with Fixed Horizontal Angles

Mid-band (1-4 kHz) coverage for traditional array with fixed

vertical and horizontal angles. To provide a consistent level across

the coverage area, the input to individual modules varies.

Calculated peak SPL for a 24 module array.

PRO.BOSE.COM

Available Horizontal Angles

55°

70°

100°

Accessory

Pre-installed

Included with module

Pre-installed

Included with module

Pre-installed

DeltaQ Array

Mid-band (1-4 kHz) coverage for a ShowMatch DeltaQ array. In

this case the horizontal and vertical coverage vary across the

length of the array. A consistent level across the audience area

is achieved with acoustic gain rather than drive level from

the amplifier.

120°

Accessory