Bose FreeSpace E-4 Manuale d'uso - Pagina 4

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1.1 The Bose

FreeSpace

music system

The Bose FreeSpace E-4 system is an integrated four-channel

digital signal processor and 400-watt power ampliﬁer for 70/100V

business music applications.

The E-4 system has a total of four source inputs, including two

Line In, one Mic/Line and one Mic/Page/Line, to provide the

inputs needed for most business music installations. The system

also has a direct input which can override the sources playing on

all four output channels.

The E-4 system has four ampliﬁer output channels which can be

conﬁgured for different zones. A Music on Hold output is also

provided for simple integration into a phone system.

In a single chassis, it provides all of the processing and control

features required for one-to-four zone business music applica-

tions. These features include:

• Auto Volume: When used with the optional FreeSpace system

Auto Volume Sense Mic, E-4 system electronics dynamically

control the program level in each zone so your customers can

always hear it, regardless of the background noise

• Scheduling: Allows you to program the E-4 system electronics

for automated on/off control, source changes, and volume

changes according to time of day or day of week

1.0 Introduction

E-4 business

13 of 76

• Opti-Voice

Paging: Provides the appropriate sound level

regardless of variations in speech projection

• Source Leveling: Automatically compensates for variations in

source input levels

• Dynamic Equalization: Maintains tonal balance at all listening

levels

• Room Equalization: Provides easy adjustment of tonal bal-

ance in each zone

• Signal Routing: Meets the demands of most four-zone sys-

tems, allowing for an input source to be routed to any of the

four ampliﬁer outputs

• Serial Data Interface: RS-232 serial port for easy interfacing

to your PC

• Contact Closure Input: Accepts a remote STANDBY switch

The integrated 400-watt power ampliﬁer features a patented

power-sharing technology which dynamically allocates power to

each output.

For example, if you have a two-zone system that requires 5 watts

in Zone 1 and 395 watts in Zone 2, the FreeSpace E-4 system

electronics distributes the power based on those needs.

The E-4 also includes an easy-to-replace memory module, which

holds the system conﬁguration settings and design ﬁle uploaded

by the FreeSpace Installer™ software (see page 14).

1.2 E-4 system accessories

Optional Bose accessories for the E-4 system are available.

• FreeSpace E-4 System User Interface Kit (U.S.) (PC029856)

A wall-mountable keypad that ﬁts into a standard U.S. single-

gang junction box. It provides buttons for volume up/down

control, 1-3 source selection, and mute.

• FreeSpace E-4 System User Interface Kit (Euro) (PC029857)

A wall-mountable keypad that ﬁts into a standard Euro single-

gang junction box. It provides buttons for volume up/down

control, 1-3 source selection, and mute.