Bose FREESPACE 4400 User manual

©2008 Bose Corporation Reference Number 294963-SM Rev. 00
Service Manual
FreeSpace®4400
Business Music System
Electronic Copy Only

2
CONTENTS
Safety Information.............................................................................................................................3
Warranty.............................................................................................................................................4
Product Description..........................................................................................................................4
Specifications.............................................................................................................................. 5-10
Electrostatic Discharge Sensitive (ESDS) Device Handling .......................................................11
Part List Notes.................................................................................................................................11
Product Variations ..........................................................................................................................11
Accessories .....................................................................................................................................12
Packaging Part List, FreeSpace®4400 System ............................................................................13
Figure 1. FreeSpace 4400 System Packaging View.........................................................................13
Packaging Part List, Rack Ear / Connector Kit ............................................................................14
Figure 2. Rack Ear / Connector Kit Packaging View ........................................................................14
Main Part List, FreeSpace Model 4400 Amplifier ................................................................... 15-16
Figure 3. FreeSpace Model 4400 Business Music System Exploded View ......................................16
Electrical Part Lists................................................................................................................... 17-59
Front Panel PCB Assembly ...................................................................................................... 17-18
Digital Signal Processor PCB Assembly ................................................................................ 19-33
Digital Signal Processor Flash Memory PCB Assembly .............................................................33
Mic Sense PCB Assembly ........................................................................................................ 34-38
Power Supply / Power Amplifier PCB Assembly.................................................................... 39-56
Power Amplifier Driver PCB Assembly ................................................................................... 57-59
Disassembly Procedures ......................................................................................................... 60-62
Test Procedure Setup .....................................................................................................................63
Test Procedures ........................................................................................................................ 64-67
Troubleshooting ........................................................................................................................ 68-75
Theory of Operation.................................................................................................................. 76-83
Microcontroller Code Update Procedure ......................................................................................84
Circuit Board Layout Diagrams ............................................................................................... 85-93
Figure 4. Mic Sense PCB Top Etch Board Layout Diagram..............................................................85
Figure 5. Mic Sense PCB Bottom Etch Board Layout Diagram........................................................85
Figure 6. Flash Memory PCB Top Etch Board Layout Diagram........................................................85
Figure 7. Flash Memory PCB Bottom Etch Board Layout Diagram..................................................85
Figure 8. Wallplate Sense PCB Top Etch Board Layout Diagram ....................................................86
Figure 9. Wallplate Sense PCB Bottom Etch Board Layout Diagram...............................................86
Figure 10. AC Power Selector PCB Top Etch Board Layout Diagram ..............................................86
Figure 11. AC Power Selector PCB Bottom Etch Board Layout Diagram.........................................86
Figure 12. DSP PCB Top Etch Board Layout Diagram .....................................................................87
Figure 13. DSP PCB Bottom Etch Board Layout Diagram ...............................................................88
Figure 14. Front Panel PCB Top Etch Board Layout Diagram..........................................................89
Figure 15. Front Panel PCB Bottom Etch Board Layout Diagram ....................................................89
Figure 16. TriPath Module PCB Top Etch Board Layout Diagram ....................................................89
Figure 17. TriPath Module PCB Bottom Etch Board Layout Diagram ..............................................89
Figure 18. Amplifier Upper PCB Top Etch Board Layout Diagram....................................................90
Figure 19. Amplifier Upper PCB Bottom Etch Board Layout Diagram ..............................................91
Figure 20. Amplifier/Power Supply Lower PCB Top Etch Board Layout Diagram.............................92
Figure 21. Amplifier/Power Supply Lower PCB Bottom Etch Board Layout Diagram.......................93
Integrated Circuit Diagrams................................................................................................... 94-105
Service Manual Revision History.................................................................................................106

3
SAFETY INFORMATION
CAUTION: The Bose®FreeSpace®4400 Business Music System
contains no user-serviceable parts. To prevent warranty infractions,
refer servicing to warranty service stations or factory service.
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BYAN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF
THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR
USED FOR ANY OTHER PURPOSE.
1. Parts that have special safety characteristics are identified by the symbol on schematics
or by special notes on the parts list. Use only replacement parts that have critical characteristics
recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed parts are
acceptably insulated from the supply circuit before returning the unit to the customer.
Use the following checks to perform these measurements:
A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a
leakage current tester or a metering system that complies with American National Standards
Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL)
UL6500 / UL60065 / IEC 60065 paragraph 9.1.1. With the unit AC switch first in the ON position
and then in OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.)
to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads,
metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical
return path to the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the
unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE
LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE
ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.
B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect a jumper
wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure
the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic
cabinet part on the unit. When testing 3 wire products, the resistance measured to the product
enclosure should be between 2 and infinite MOhms. Also, the resistance measured to exposed
input/output connectors should be between 4 and infinite MOhms. When testing 2 wire prod-
ucts, the resistance measured to exposed input/output connectors should be between 4 and
infinite MOhms. If it is not within the limits specified, there is the possibility of a shock hazard,
and the unit must be repaired and rechecked before it is returned to the customer.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

4
PRODUCT DESCRIPTION
FreeSpace®4400 Business Music System
The Bose®FreeSpace 4400 Business Music System is an integrated four-channel digital signal
processor and 400-Watt power amplifier for 70/100V business music applications.
The FreeSpace 4400 chassis provides a total of four source inputs (two Line In, one Mic/Line
and one Mic/Line/Page) to meet the needs of most business music installations. A Music on
Hold (MOH) output is also provided for simple integration into a phone system.
As a single component, the chassis provides all of the processing and control features required
for one to four zone business music applications. These features include:
• Auto Volume: When used with the optional FreeSpaceAuto Volume Sense Mic, the 4400
system dynamically controls the program level in each zone so that the audio program
material can always be heard, regardless of the background noise.
• Scheduling: Allows you to program the 4400 system for automated on/off and source
selections according to time of day or day of week.
• 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 balance in each zone.
• Limiting: Protects loudspeakers from unwanted transient power loads.
• Signal Router: Meets the demands of most four-zone systems, allowing for any input signal
to be routed to any of the amplifier outputs.
• RS-232 Connection: Provides easy interfacing to your PC.
• Contact Closure Input: Allows remote power sequencing.
The integrated 400-Watt power amplifier features a patented power-sharing technology which
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 4400 system distributes the power based on those needs.
The 4400 also includes an easy-to-replace memory module, which holds a design file and the
current hardware configuration.
The Bose FreeSpace 4400 Business Music System is covered by a limited 5-year transferable
warranty.
WARRANTY

5
SPECIFICATIONS
Audio Input Source 1 Unbalanced RCA, shell grounded through a 301 Ohm resistor
Connectors: Source 2 Unbalanced RCA, shell grounded through a 301 Ohm resistor
Page Balanced 4 pin Beau style: +, -, ground and contact closure in
Aux/Mic/Line 3 pin Beau style, +, - and ground
Mic 1-4 3 pin Beau style, +, - and ground
Direct In 4 pin Beau style, +, -, ground, and contact closure in
Audio Output
Connectors: Line out 4 pin Beau style, +, -, ground, and contact closure in
MOH out 2 pin Beau style, + and Ground
Amp 1-4 2 pin, Beau style, + and -
Control Connectors: Remote 1-4 RJ-45, 8 pin, ground shell
Standby In 2 pin Beau style, contact closure in and ground
Dimensions: 5.25"H x 16.5"W x 15.5"D (13.3 x 43.8 x 39.4 cm)
Weight: Unpackaged: 30 lbs (13.6 kg)
Shipping: 41 lb (18.6 Kg)
AC Mains input: IEC standard User selectable 100/120 or 220/240V
3 pin 50/60 Hz
receptacle 300 Watts maximum
Overall Performance
Nominal Limits Conditions
Gain: 0 dB +1 dB At 1 kHz; input gain set to nominal 0 dB
Dynamic range: 100 dB >/= 96 dB Measured with ADC/DAC full scale mapped to
+17 dBV; this is THD +N measured at FS-60,
through A-weighting filter, and expressed in dB
below full scale
THD+N: .05% .1% At +10 Vrms output, for signal frequencies from
30 Hz to 20 kHz
Crosstalk at 1 kHz: -80 dB </= -70 dB Terminate unused input terminals with
100 Ohm balanced-connected resistors
Crosstalk at 10 kHz: -60 dB </= -50 dB Terminate unused input terminals with
100 Ohm balanced-connected resistors
Frequency response: 30 - 20 kHz +3 dB Reference 1 kHz, measured at 0 dBV input
Output noise: -70 dBV </= -65 dBV Channel noise measured through an
A -weighting filter. Gain structure set to deliver
rated power and expressed in dBV

6
SPECIFICATIONS
Line Input Source 1 and 2
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential: +/> 50k Ohm +/-20% At 1 kHz
CMRR referred to 80 dB >/= 74 dB At 1 kHz, 20 dB gain, 200 Ohm source
output: impedance
Input sensitivity for -20 dBV to +/-1 dB At 1 kHz
codec FS: +17 dBV
Gain, all settings: 20 dB to +/-1 dB 1 kHz, 50 Ohm source
-20 dB
Maximum input level: +17 dBV >/= +17 dBV THD+N </= 0.3%, 30-20 kHz, 0 dB gain
THD+N: .001% .01% At +10 dBV output, 1 kHz, 20 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 to 20 kHz +/-1.5 dB Reference 1 kHz, measured at 20 dB gain
and with 0 dBV output
Page and Aux/Mic Inputs
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential: 20k Ohm +/-5% At 1 kHz
Equivalent input noise at 60 dB, at 60 dB, A-weighted RMS, 200 Ohm source
at INA129 gains of 60 -130 dBV -127 dBV termination
dB, 40 dB, 20 dB and at 40 dB, at 40 dB,
0 dB: -127 dBV -125 dBV
at 20 dB, at 20 dB,
-115 dBV -113 dBV
at 0 dB, at 0 dB,
-96 dBV -93 dBV

7
SPECIFICATIONS
Page and Aux/Mic Inputs (continued)
Nominal Limits Conditions
CMRR referred 90 dB >/= 70 dB At 1 kHz, 60 dB gain, from source of nominal
to output: 200 Ohms
Input sensitivity for -60 dBV to +/-1 dB At 1 kHz
codec FS: +17 dBV
Gain, all settings: 20 dB to +/-1 dB 1 kHz, 50 Ohm source
-20 dB
Maximum input level: +17 dBV >/= 10 dBV THD+N </= 0.3%, 20-20 kHz, 0 dB gain
THD+N: .001% .01% At +10 dBV output, 1 kHz, 60 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 Hz to +0/-0.5 dB Reference 1 kHz, measured at 60 dB gain and
20 kHz with 0 dBV output
Sense Mic inputs
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential: 20k Ohm +5% At 1 kHz
Equivalent input noise at 60 dB, at 60 dB, A weighted RMS, 200 Ohm source termination
at INA129 gains of 60 -127 dBV -125 dBV
dB, 40 dB and 20 dB: at 40 dB, at 40 dB,
-115 dBV -112 dBV
at 20 dB, at 20 dB,
-96 dBV -93 dBV
CMRR referred
to output: 90 dB >/= 60 dB At 1 kHz, 60 dB gain, from source of nominal
200 Ohm
Phantom power: +12V +/-1V Open circuit
Input sensitivity for -60 dBV to +/-1 dB At 1 kHz
codec FS: +20 dBV
Gain, all settings: -60 dB to +/-1 dB 1 kHz, 50 Ohm source
+20 dB

8
SPECIFICATIONS
Sense Mic inputs (continued)
Nominal Limits Conditions
Maximum input level: +10 dBV >/= 7 dBV THD+N </= 0.3%, 20-20 kHz, 0 dB gain
THD+N: -84 dB </= -80 dB At +10 dBV output, 1 kHz, 60 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crossalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 20 Hz to +0/-0.5 dB Reference 1 kHz, measured at 60 dB
gain and 20 kHz with 0 dBV output
Direct Input
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential: +/> 10kOhms +/-20% At 1 kHz
CMRR referred
to output: 92 dB >/= 60 dB At 1 kHz, 20 dB gain, 200 Ohm source
impedance
Input sensitivity -20 dBV to +/-1 dB At 1 kHz
for codec FS: +17 dBV
Gain: 0 dB +/-1 dB From input connector to amplifier input stage
Maximum input level: +17 dBV >/= +17 dBV THD+N </= 0.3%, 30-20 kHz, 0 dB gain
THD+N: .001% .01% At +10 dBV output, 1 kHz, 20 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 Hz to +0/-0.5 dB Reference 1 kHz, measured at 20 dB gain and
20 kHz with 0 dBV output
Line Outputs
Nominal Limits Conditions
Output impedance: 200 Ohms +/-1% Impedance at 1 kHz, each output
terminal
Maximum output level: +17 dBV >/= +17 dBV 1 kHz, THD less than 0.1%, load 10 k Ohm,
differential

9
Line Outputs (continued)
Nominal Limits Conditions
CMRR referred
to output: 92 dB >/= 60 dB At 1 kHz, 20 dB gain, 200 Ohm source
impedance
Output noise: -90 dBV </= -85 dBV A-weighted, set for 0 dB gain
THD+N: .001% .01% At +10 dBV output, 1 kHz, 20 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB Set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 Hz to +0/-1.0 dB Reference 1 kHz, measured at 20 dB gain and
20 kHz with 0 dBV output
Turn on/off pop: 10 mV peak </= 50 mVpk As monitored by a listener, must be inaudible at
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
Music on Hold (MOH)
Nominal Limits Conditions
Output impedance: 400 Ohms +/-1% Impedance at 1 kHz
Maximum output level: +17 dBV >/= +17 dBV 1 kHz, THD less than 0.1%, load 10k Ohm,
differential
Output noise: -90 dBV </= -85 dBV A-weighted, set for 0 dB gain
THD+N: .001% .01% At +17 dBV output, 1 kHz, 0 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB Set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 20 Hz to +0/-1.0 dB Reference 1 kHz, measured at 0 dB gain and
15 kHz with 0 dB output
Turn on/off pop: 10 mV peak </= 50 mVpk As monitored by a listener, must be inaudible at
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
SPECIFICATIONS

10
Power Amplifier
Nominal Limits Conditions
Power bandwidth: 30 Hz to 1% THD Loaded at 25 Ohms
20 kHz
Frequency response: 30 Hz to +/-3 dB Output voltage of 10 Vrms over a load
20 kHz impedance of 12.5 Ohms to 1000 Ohms
THD+N at 70.7 Vrms, .05% .1% 30 Hz to 20 kHz, 25 Ohm load, A weighted
200W:
THD+N at 70.7 Vrms, .5% 1% 7 kHz, 12.5 Ohm load, A weighted
400W:
THD+N at 100 Vrms, .05% .1% 30 Hz to 20 kHz, 25 Ohm load, A weighted
200W:
THD+N at 100 Vrms, .5% 1% 7 kHz, 12.5 Ohm load, A weighted
400W:
Sensitivity at 70V: 11 dBV +/-1 dBV
Sensitivity at 100V: 14 dBV +/-1 dBV
Gain: 26 dB +/-0.5 dB
Output noise: -70 dBV -65 dBV A-weighted with a 20 kHz filter
Crosstalk at 1 kHz: -90 dB </= -80 dB Set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
Crosstalk at 10 kHz: -70 dB </= -60 dB
Turn on/off pop: 10 mV peak </= 50 mVpk As monitored by a listener, must be inaudible at
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
SPECIFICATIONS

11
PART LIST NOTES
1. This part is not normally available from Customer Service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCBs are listed in the Electrical Part List.
3. This part is critical for safety purposes. Failure to use a substitute replacement with the
same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer
to the next higher assembly for a replacement part.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
•Perform work at an electrically grounded work station.
•Wear wrist straps that connect to the station or heel straps that connect to conductive
floor mats.
•Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
•Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays.
PRODUCT VARIATIONS
Description Bose
®
Product Code
FREESPACE®4400 AMPLIFIER, 120V, US/CAN
FREESPACE 4400 AMPLIFIER, 230V, EURO
FREESPACE 4400 AMPLIFIER, 100V, JAPAN
FREESPACE 4400 AMPLIFIER, 230V, UK
FREESPACE 4400 AMPLIFIER, 240V, AUS
042346
042347
042348
042349
042350

12
ACCESSORIES
Optional Bose®accessories for the FreeSpace®4400 system are available.
•FreeSpace 4400 System AVM 1-Zone
User Interface (PC 042351) A wall-mount-
able keypad that fits into a standard double-
gang junction box. It provides buttons for
volume up/down control, 1-3 source selec-
tion, and mute or Auto Vol-ume on/off con-
trols for a single zone.
•FreeSpace 4400 System AVM 2-Zone
User Interface (PC 042352) A wall-mount-
able keypad that fits into a standard double-
gang junction box. It provides buttons for
volume up/down control, 1-3 source selec-
tion, and mute or Auto Volume on/off con-
trols for two zones.
• FreeSpace 4400 System Page User
Interface (PC 042353) A wall-mountable
keypad that fits into a standard double-gang
junction box. It provides buttons for 1-4 page
zone selection, all page zones selection and
initiate page.
•FreeSpace 4400 System Auto Volume
Mic Kit (U.S.) (PC 042354) One sensing
microphone that can be mounted as is or in
a standard U.S. single-gang junction box.
•FreeSpace 4400 System Auto Volume
Mic Kit (Euro) (PC 042355) One sensing
microphone that can be mounted as is or in
a standard Euro single-gang junction box.
Volume up
(2 dB steps)
Volume down
(2 dB steps)
Mute
or
Auto volume
on/off
Select LINE 1
input source
Select LINE 2
input source
Select MIC/
LINE 3 input
source
FreeSpace
®
AVM 2-Zone User Interface
MUTE /
AUTO VOL
MUTE /
AUTO VOL
SOURCE VOLUME SOURCE VOLUME
Zone A
controls
Zone B
controls
MUTE /
AUTO VOL
Volume up
(2 dB steps)
Volume down
(2 dB steps)
Mute
or
Auto volume
on/off
Select LINE 1
input source
Select LINE 2
input source
Select MIC/
LINE 3 input
source
FreeSpace®AVM 1-Zone User Interface
Select paging
zone #2
Select paging
zone #4
Initiate a page
Select paging
zone #1
Select paging
zone #3
Select all
paging zones
Page User Interface
FreeSpace® 4400 System Auto Volume Mic Kit
[PC042354 (U.S.), PC042355 (Euro)]
Wall plate-microphone
assembly
(2) #6-32 (3 mm) screws
(2) Wire nuts
Paint plug

13
PACKAGING PART LIST
FreeSpace®4400 System Packaging View (see Figure 1)
Figure 1. FreeSpace 4400 System Packaging View
Item
Number
Description Bose
®
Part
Number
Vendor Part
Number
Qty. Note
1 CARTON 301388 1437-9101+1-3 1
2 PE FOAM HOLDER 301390 1493-1621+0 2
3 ACCESSORY KIT, INCLUDES:
CARTON
BRACKET, RACK EAR
POLYBAG, 04x5x9’
POLYBAG, 04x5x6’
SCREW, MACHINE, FLAT-CS
FOOT, RUBBER
LABEL, VOLTAGE SELECT
2-TERMINAL INPUT CONN
3-TERMINAL INPUT CONN
4-TERMINAL INPUT CONN
2-TERMINAL OUTPUT CONN
302389
-
-
-
-
298706
298707
170206
172930-02
172930-03
172930-04
260621-02
SVC-EXPO11+KIT
1481-0500+0
4135-6501+0
1497-1932+0
1497-2402+0
2901-4012+3000
4157-1121+0
3001-1631+0
2113-3252+0
2113-3143+0
2113-3147+0
2113-3258+0
1
1
2
1
1
8
4
2
7
2
4
5
4
4
4
4
3
4 AC POWER CORD, 120V, US/CAN
AC POWER CORD, 230V, EURO
AC POWER CORD, 100V, JAPAN
AC POWER CORD, 230V, UK
AC POWER CORD, 240V, AUS
298165
298166
298167
298168
298169
7012-7340+0
7012-6980+0
7012-5530+0
7012-6603+0
7012-5430+1
1
1
1
1
1
3
5 POLY BAG, 10x14’ - 1497-4122+0 1 4
6 DOCUMENT PACK, INCLUDES:
MANUAL
POLYBAG FOR MANUAL
FS 4400 SOFTWARE CD
QUICKSTART GUIDE
302390
301433
-
301428-001
301434
SVC-EXPO11+DOC
4301-7264+0
1497-1062+0
4115-0005+0
3050-4011+0
1
1
1
1
3
4
7 POLYBAG FOR UNIT - 1497-8012+0 1 4
8 FREESPACE 4400 AMPLIFIER REF - 1

14
PACKAGING PART LIST
Rack Ear / Connector Kit (see Figure 2)
Figure 2. Rack Ear / Connector Kit Packaging View
Item
Number
Description Bose
®
Part
Number
Vendor Part Number Qty. Note
- ACCESSORY KIT, INCLUDES: 302389 SVC-EXPO11+KIT 1
1 CARTON - 1481-0500+0 1 4
2 POLYBAG, 04x5x9’ - 1497-1932+0 1 4
3 BRACKET, RACK EAR - 4135-6501+0 2 4
4 LABEL, VOLTAGE SELECT 170206 3001-1631+0 2
5 POLY BAG, 04x5x6 - 1497-2402+0 1 4
6 SCREW, MACHINE, FLAT-CS 298706 2901-4012+3000 8
7 FOOT, RUBBER 298707 4157-1121+0 4
8 2-TERMINAL OUTPUT CONN 260621-02 2113-3258+0 5
9 4-TERMINAL INPUT CONN 172930-04 2113-3147+0 4
10 2-TERMINAL INPUT CONN 172930-02 2113-3252+0 7
11 3-TERMINAL INPUT CONN 172930-03 2113-3143+0 2

15
MAIN PART LIST
FreeSpace®Model 4400 Amplifier (see Figure 3)
Item
Number
Description Bose
®
Part
Number
Vendor Part Number Qty. Note
1 CHASSIS - 1406-0301+0 1 3, 4
2 SCREW, SELF TAPPING - 2941-3006+3000 14 4
3 SCREW, PAN, VOLT SEL CVR - 2900-3006+3200 2 4
4 COVER, AC SELECT SWITCH - 1467-7201+0 1 4
5 SWITCH, AC POWER, 2P1T 301394 5200-4881+0 1 3
6 SCREW, S-TITE, PLAT-CS - 2941-3012+3000 2
7 AC INLET, IEC 301396 2113-3050+0 1 3
8 FUSE HOLDER 301395 4153-1100+0 1 3
9 NUT, M4, BLK - 2640-4030+0730 2 4
10 EXTERNAL TOOTH WASHER - 2605-4008+0850 2 4
11 BRACKET, PLASTIC CLIP - 4155-2541+0 1 4
12 AC VOLTAGE SEL PCB ASSY 301397 SVC-EXPO01+PSPA1 1 2, 3
13 SCREW, S-TITE, PLAT-CS - 2941-3008+3000 6 4
14 TRANSFORMER, TOROIDAL,
AC 301393 1806-3954+0 1 3
15 WASHER, M4x0.8x10 MM - 2600-8010+1602 1 4
16 SPRING WASHER - 2607-8020+1540 1 4
17 BOLT, FASTENER - 4135-7111+0 1 4
18 END CAP, FRONT PANEL 301405 4155-2001+0 2
19 NUT, M3, NICKEL - 2640-3022+0544 4 4
20 LOCK WASHER, BLK - 2607-3008+0607 4 4
21 WASHER, METAL, NICKEL - 2600-3008+1004 4 4
22 FAN, DC, 24V, 0.3A, 4200 RPM 304149 8913-0008+1 1 3
23 PANEL, FRONT, ALUMINUM 301404 SVC-EXPO11+FPN 1
24 SCREW, SELF TAPPING - 2941-3006+3000 2 4
25 LENS, LED, 31.6x12.3x10 - 3717-3401+0 11 4
26 KNOB, POWER ON/OFF 301408 2445-2801+0 1
27 PCB SUPPORT, 12 MM HIGH - 4152-0911+0 4 4
28 SCREW, SELF TAPPING - 2941-3006+3000 12 4
29 LED HOLDER - 4172-0030+0 11 4
30 LED PCB ASSY 301402 SVC-EXPO01+LED 1 2
31 TOP COVER, CHASSIS 301407 1406-0601+0 1 3
32 S-TITE, BLK - 2944-3008+3000 1 4
33 POWER AMP PCB MOD ASSY 301391 SVC-EXPO01+AMP 1 2

16
Figure 3. FreeSpace®Model 4400 Business Music System Exploded View
MAIN PART LIST
FreeSpace®Model 4400 Amplifier (continued) (see Figure 3)
Item
Number
Description Bose
®
Part
Number
Vendor Part Number Qty. Note
34 MAIN DSP PCB ASSY 301398 SVC-EXPO01+DSPJ 1 2
35 WALL PLATE PCB ASSY 301400 SVC-EXPO01+WALLP 1 2
36 MIC SENSE PCB ASSY 301399 SVC-EXPO01+MIC 1 2
37 BRACKET, BOTTOM - 4155-2411+0 4 4
38 S-TITE, BLK - 2944-3008+3000 2 4
39 LOCK WASHER, BLK - 2607-3008+0607 1 4
40 M3x20, BLK, ZN - 2904-3020+3000 4 4
41 SCREW, S-TITE, PLAT-CS - 2941-3012+3000 10 4
42 HEATSINK, 220x124.2x70 MM - 5400-9741+0 1 4
43 INSUL. SHT, 24x19x2 MM - 3100-7081+0 8 4
44 GND TERMINAL - 4135-6981+0 6 4
45 CLIP, HEATSINK - 4135-6511+0 4 4
46 POST, SUPPORT, PCB - 4155-2401+0 3 4
47 S-TITE, BLK - 2944-3008+3000 3 4
48 PILLAR, STANDOFF - 4135-7121+0 3 4
- FLASH MEMORY PCB ASSY 301401 SVC-EXPO01+FLASH 1 2
- SURGISTOR, 8A, 0.7 OHM,
N15SP2R5M 313000 5202-0027+0 1 3
- FUSE, SLO-BLO, 6.30A,
100/110V (JAPAN, US/CAN) 177311- 06300 5120-0040+0 1 3
- FUSE, SLO-BLO, 3.15A,
230/240V (EURO, UK, AUS) 177311- 03150 5120-0079+0 1 3
- HARN, 16P, DSP/REM OUT 301429 7012-7961+1 1
- HARN, 20P, DSP/MIC SENSE 301430 7012-7950+1 1
- HARN, 16P, DSP/UI 301431 7012-7960+1 1
- HARN, 34P, PS-PA/DSP 301432 7012-7970+0 1

17
ELECTRICAL PART LIST
Resistors
Front Panel PCB Assembly
Reference
Designator
Description Vendor Part
Number
Note
R101 1.1K, RMG, 0805, 1/10W, 1% 4720-112A+J 4
R102 10K, RMG, 0805, 1/10W, 1% 4720-103A+J 4
R107 10 OHM, RMG, 2512, 1W, 5% 4728-100J+3 4
R108 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R109 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R110 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R111 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R112 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R113 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R114 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R115 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R116 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R117 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R118 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R119 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R120 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R121 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R122 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R123 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R124 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R125 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R126 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R127 562 OHM, RMG, 0805, 1/10W, 1% 4720-5620+J 4
R128 1.1K, RMG, 0805, 1/10W, 1% 4720-112A+J 4
R135 10K, RMG, 0805, 1/10W, 1% 4720-103A+J 4
R136 100K, RMG, 0805, 1/10W, 1% 4720-104A+J 4
Reference
Designator
Description Vendor Part
Number
Note
C101 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
C102 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
C103 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
C104 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
C105 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
C106 10uF, CE, 25V, 20%, 5.3X5.4, SMD,
UWX1E100MCR1GB, NCC 157E-106M+3-JJC 4
C107 10uF, CE, 25V, 20%, 5.3X5.4, SMD,
UWX1E100MCR1GB, NCC 157E-106M+3-JJC 4
C113 0.01uF, CC, 0805, 50V, 5% 150F-103J+J-BD 4
C114 0.1uF, CC, 0805, 25V, 10%, 1.2x2.0 150E-104K+J-BD 4
Capacitors

18
ELECTRICAL PART LIST
Diodes
Front Panel PCB Assembly
Reference
Designator
Description Vendor Part
Number
Note
D102 1N4148W, SOD-123, SMD, PANJIT 4801-48W0+3 4
D103 S1A, 1A, 50V, DO-214AA, SMD, PANJIT 480S-1A00+3 4
Integrated Circuits
Reference
Designator
Description Vendor Part
Number
Note
U101 SN74HC14D, SOP PACKAGE 3130-8680+0 4
U102 8 BIT SHIFT REG, M74HC595M1R, SO16, ST 3132-3591+0 4
U103 8 BIT SHIFT REG, M74HC595M1R, SO16, ST 3132-3591+0 4
U104 8 BIT SHIFT REG, M74HC595M1R, SO16, ST 3132-3591+0 4
U105 VOLT REG, SMD, POS, NJM78L05UA, SOT89 3132-3601+0 4

19
ELECTRICAL PART LIST
Resistors
Reference
Designator
Description Vendor Part
Number
Note
R501 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R502 182 OHM, RMG, 1/10W, 1%, 0805 4720-1820+J 4
R503 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R504 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R505 1.27K, RMG, 1/10W, 1%, 0805 4720-1271+J 4
R506 5.49K, RMG, 1/10W, 1%, 0805 4720-5491+J 4
R507 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R508 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R509 182 OHM, RMG, 1/10W, 1%, 0805 4720-1820+J 4
R510 100 OHM, RMG, 1/10W, 1%, 0805 4720-101A+J 4
R511 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R513 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R514 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R515 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R516 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R517 10 OHM, RMG, 1/10W, 1%, 0805 4720-100A+J 4
R518 182 OHM, RMG, 1/10W, 1%, 0805 4720-1820+J 4
R519 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R520 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R521 1.27K, RMG, 1/10W, 1%, 0805 4720-1271+J 4
R522 5.49K, RMG, 1/10W, 1%, 0805 4720-5491+J 4
R523 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R524 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R525 182 OHM, RMG, 1/10W, 1%, 0805 4720-1820+J 4
R526 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R528 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R529 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R530 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R531 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R532 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R533 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R534 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R537 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R538 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R539 100 OHM, RMG, 1/10W, 1%, 0805 4720-101A+J 4
R540 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R541 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R544 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R545 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R546 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R547 10 OHM, RMG, 1/10W, 1%, 0805 4720-100A+J 4
R548 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R549 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R550 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R553 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
R554 2K, RMG, 1/10W, 1%, 0805 4720-202A+J 4
Digital Signal Processor PCBAssembly

20
ELECTRICAL PART LIST
Resistors (continued)
Reference
Designator
Description Vendor Part
Number
Note
R555 7.87K, RMG, 1/10W, 1%, 0805 4720-7871+J 4
R556 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R557 5.11K, RMG, 1/10W, 1%, 0805 4720-5111+J 4
R558 18.2K, RMG, 1/10W, 1%, 0805 4720-1822+J 4
R561 4.75K, RMG, 1/10W, 1%, 0805 4720-4751+J 4
R562 5.9K, RMG, 1/10W, 1%, 0805 4720-592A+J 4
R563 1.1K, RMG, 1/10W, 1%, 0805 4720-112A+J 4
R566 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R568 25.5K, RMG, 1/10W, 1%, 0805 4720-2552+J 4
R571 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R572 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R573 25.5K, RMG, 1/10W, 1%, 0805 4720-2552+J 4
R575 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R576 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R577 25.5K, RMG, 1/10W, 1%, 0805 4720-2552+J 4
R579 100K, RMG, 1/10W, 1%, 0805 4720-104A+J 4
R580 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R581 1.91K, RMG, 1/10W, 1%, 0805 4720-1911+J 4
R582 25.5K, RMG, 1/10W, 1%, 0805 4720-2552+J 4
R583 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R584 4.75K, RMG, 1/10W, 1%, 0805 4720-4752+J 4
R585 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R586 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R587 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R588 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R589 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R590 26.7K, RMG, 1/10W, 1%, 0805 4720-2672+J 4
R591 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R592 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R593 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R594 301 OHM, RMG, 1/10W, 1%, 0805 4720-3010+J 4
R599 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R600 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R601 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R603 49.9 OHM, RMG, 1/10W, 1%, 0805 4720-49R9+J 4
R604 49.9 OHM, RMG, 1/10W, 1%, 0805 4720-49R9+J 4
R605 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R608 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R609 100 OHM, RMG, 1/10W, 1%, 0805 4720-101A+J 4
R610 100 OHM, RMG, 1/10W, 1%, 0805 4720-101A+J 4
R611 100 OHM, RMG, 1/10W, 1%, 0805 4720-101A+J 4
R612 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R614 10K, RMG, 1/10W, 1%, 0805 4720-103A+J 4
R615 1K, RMG, 1/10W, 1%, 0805 4720-102A+J 4
R619 1K, RMG, 1/10W, 1%, 0805 4720-102A+J 4
R623 1K, RMG, 1/10W, 1%, 0805 4720-102A+J 4
Digital Signal Processor PCBAssembly