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Overview

This application note covers the basic concepts for

the application of the Freespace 360P series ii loud-

speaker in business music systems.

The Freespace 360P series ii loudspeaker is ide-

ally suited to background and foreground music

in outdoor applications. The unique design of the

Freespace 360P-ii delivers a full range response

across a 360° area. The Freespace 360P-ii loudspeak-

er is compatible with 70V and 100V amplifiers, and

is capable of delivering up to 90dBsPL in a typical

application with a 15ft (4.8m), speaker to listener

distance.

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 100dBsPL". in either case the chal-

lenge is to gather the right set of requirements, and

then turn them into a set of design criteria that you

can use to create 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

360P Series II

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 360P-ii loudspeakers.

Design Guidelines

When creating a design that uses the Freespace

360P series ii loudspeakers, you should consider the

following:

• The FreeSpace 360P-II is designed for in or above

ground installation.

• Listeners should always be at least 3ft (1m), away

from the nearest Freespace 360P-ii.

• Maximum SPL for a typical application is between

85 and 90dB

sPL

• Always add 25% headroom to your amplifier to

accommodate various types of program material.

70Hz – 15kHz ± 3dB

80 watts continuous

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

N/A

100 dB-SPL @ 1m (pink noise)

360° Horizontal

50° Vertical

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