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Overview

This application note covers the basic concepts for

the application of the Freespace Ds 100se loud-

speakers in business music systems.

The Freespace Ds 100se loudspeakers are ideally

suited to background music, foreground music and

paging applications with mounting heights between

8 and 32ft (2.4 to 10m). The Articulated Array

composed of two 2.25 inch drivers, delivers consis-

tent response across the entire 180° coverage area.

The 5.25 inch driver, mounted in a ported enclo-

sure, provides the additional bandwidth required

for today's foreground music applications. The

Freespace Ds 100se loudspeakers are compatible

with 70V, 100V and low impedance amplifiers and

are capable of delivering up to 95 dB

application with a 15ft (4.8m), mounting height.

All system designs begin with a set of requirements.

The system requirements can be as simple as "it has

to sound great," or as detailed as "it must have an

output level of 100 dB

." in either case, the chal-

sPL

lenge is to gather the right set of requirements and

convert them into a set of design criteria to use in

creating your design.

The three key requirements that you need to

identify in order to deliver the right business

music sound system are:

Loudness What sound pressure level is required

for this application?

Response What bandwidth is required for the

type of program material that will be used?

CoveRage How consistent must the sound be

across the entire coverage area?

Bose Professional systems Division

FreeSpace

Prod uct Specifications

Frequency Range

Long Term Power Handling

Sensitivity

Impedance

Maximum Acoustic Output

Dispersion

each of these requirements can be easily converted

into a specification that we can use to create our

system design. if we understand the customer's

needs in these three areas, we can deliver a design

that will, at a minimum, meet their needs, and at

best, exceed their expectations.

For the purposes of this application note, we will

™

assume that you are familiar with the system

requirements for a business music system and are

ready to focus on the creation of a speaker layout

using the Freespace Ds 100se loudspeakers.

Design Guidelines

When creating a design that uses the Freespace Ds

100se loudspeakers, you should consider the following:

in a typical

sPL

•

The Freespace Ds 100se loudspeakers are ideally

suited to background music, foreground music

and paging applications.

• Recommended mounting height for the FreeSpace

Ds 100se is between 8 and 32ft (2.4 and 10.0m).

• Provide at least 20ft (6.1m) of space between

adjacent loudspeakers for typical applications.

• In outdoor applications do not space the loud-

speakers by more than 50ft (15.2m).

• Generally, the FreeSpace DS 100SE should be

pitched downward between 0° and 15°.

• Maximum SPL for a typical application is between

89 and 98 dB

• Always add 25% headroom to your amplifier to

accommodate various types of program material.

DS 100SE

65 Hz – 16 kHz ± 3 dB

100 watts continuous

85 dB-SPL @ 1W/1m (pink noise)

70/100V or 8 Ohm

105 dB-SPL @ 1m (pink noise)

111 dB-SPL peak @ 1m (pink noise)

180° x 75° (Horizontal x Vertical)

sPL

p r o . B o s e . c o m