Bose ACOUSTIMASS PRO User manual

1
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE®CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
Contents
Safety Information............................................................................................................................ 2
Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 3
Specifications................................................................................................................................3-4
Disassembly/Assembly Procedures ........................................................................................... 5-6
Figure 1. Bottom Panel .................................................................................................................... 6
Figure 2. Side View of Chassis ........................................................................................................ 6
Figure 3. Amplifier Chassis Cover.................................................................................................... 6
General Test Setup........................................................................................................................... 7
Test Procedures ............................................................................................................................ 7-8
Part List Notes.................................................................................................................................. 9
Main Assembly Part List................................................................................................................ 10
Figure 4. Exploded View ................................................................................................................ 10
Electrical Part List..................................................................................................................... 11-16
Packaging ....................................................................................................................................... 17
Figure 6. Packaging View .............................................................................................................. 17
Figure 7. Wiring Schematic ............................................................................................................ 17
Figure 8. Driver Location................................................................................................................ 17

2
1. Parts that have special safety characteristics are identified by the symbol on
schematics or by special notes in the part lists. 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) 1492 (71). With the unit AC switch first in the ON position and then in
OFF position, measure from a known earth ground (metal water pipe,
conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket,
metal cabinet, screw-heads, 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's
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 be-
tween the jumpered AC plug and each exposed metallic cabinet part on the
unit. When the exposed metallic part has a return path to the chassis, the
reading should be between 1 and 5.2 Meg ohms. When there is no return
path to the chassis, the reading must be "infinite". 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.
SAFETY INFORMATION
CAUTION: THE BOSE® ACOUSTIMASS®PROFESSIONAL POWERED SPEAKER SYS-
TEM CONTAINS NO USER SERVICEABLE PARTS. TO PREVENT WARRANTY INFRAC-
TIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SER-
VICE.

3
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.
SPECIFICATIONS
General
Electrical
Inputs: Line-level balanced XLR and unbalanced 1
/
4" phono
Input Impedance: 10k unbalanced, 2.4k balanced
Pin Assignment: See schematic
Maximum Amperage: 6.5 amps
Power Input Requirements: 120V, North America
230V, Europe and Australia
100V, Japan
Power Output: 100VAC line input: 350W
115VAC line input: 450W
230VAC line input: 450W
Common Mode Rejection Ratio: 40 dB
Weight: 75 lb.
(
34 kg
)
Dimensions: 16"H x 22 1/4" W x 23 1/4" D (40.6 x 56.5 x 59.1 cm)
Driver Complement: Six 4 1/2" helical voice coil drivers, One 12"
magnetically braked woofer

4
SPECIFICATIONS
Acoustics
Frequency Response: 50-18k ±3dB
Maximum Output (free field)
Speech Only:
Music: 122 dB SPL, 1m 120 dB SPL, 1m
Crossover Frequency: 200Hz
Dispersion Angles (-6 dB down points)
Horizontal:
Vertical:
Horizontal, Stacked Pair:
Vertical, Stacked Pair:
100˚ at -6 dB averaged by octave, 1kHz-8kHz
60˚ at -6 dB averaged by octave, 1kHz-8kHz
100˚ at -6 dB averaged by octave, 1kHz-8kHz
30˚ at -6 dB averaged by octave, 1kHz-8kHz
Environmental
Temperature
Operating Range:
Storage Range:
Humidity:
-20˚F to 122˚F (-29˚C to 50˚C)
-40˚F to 180˚F (-40˚C to 82˚C)
20-95% relative humidity (Note: Do not operate this
speaker system in the rain or when wet.)
Mechanical Structure
C
abinet Material:
S
tructural polyurethane foam
Tie Rods (4): 1/4" -20 UNC
Baffle Material: Die-cast aluminum
Grille Material: Stainless steel
Threaded inserts: 8 mm - 18 UNC
T-Nuts: 1/4" -20 UNC

5
Note: Numbers in parentheses correspond
to the item call outs in Figure 1, 2, 3, 4.
1. Amplifier Removal
1.1 Remove the sixteen screws (8) that
secure the amplifier (3) to the cabinet.
1.2 Lift the amplifier out of the enclosure.
Disconnect the ground lug from the ampli-
fier chassis and the two output wires from
the capacitor (14) and inductor (13).
2. Amplifier Replacement
2.1 Connect the ground wire (green) to the
amplifier (3) chassis. Connect the red wire
to the capacitor (14) and the black wire to
the inductor (13).
2.2 Replace the sixteen screws (8) that
secure the amplifier to the cabinet.
3. Woofer Removal
3.1 Perform procedure 1 first.
3.2 Remove the eight screws (8) that
secure the woofer (1) to the cabinet.
3.3 Lift the woofer out and remove the two
wires connected to it.
4. Woofer Replacement
4.1 Connect the red wire to the positive
and the black wire to the negative terminal
of the woofer (1).
4.2 Replace the eight screws (8) that
secure the woofer to the cabinet.
5. Grille Removal
5.1 Remove the eight screws (7) that
secure the grille (4) to the cabinet.
5.2 Pull the grille off.
Note: On some units the screws are
secured with loctite. Use MEK solvent to
remove the screws.
6. Grille Replacement
6.1 Align the grille (4) with the cabinet so
that the Bose®logo is in the same direction
as the label on the amplifier.
6.2 Replace the eight screws (7) that
secure the grille to the cabinet.
7. Driver Removal
7.1 Perform procedure 5 first.
7.2 Remove the three screws (6) that
secure the driver (2) to the cabinet.
7.3 Lift the driver out from the cabinet and
remove the two wires attached to it.
Note: On some units the screws are
secured with loctite. Use MEK solvent to
remove the screws.
8. Driver Replacement
8.1 Connect the two wires to the driver (2).
Refer to the wiring diagram on page 18.
8.2 Replace the three screws (6) that
secure the driver to the cabinet.
9. Amplifier Cover Removal
9.1 Perform procedure 1 first.
9.2 Remove the six screws (A) that secure
the top cover to the chassis and lift the top
cover off.
10. Amplifier Cover Replacement
10.1 Align the top cover to the chassis and
replace the six screws (A) that secure the
top cover to the chassis.
11. Amplifier Chassis Cover Removal
11.1 Perform procedure 1 and 9 first.
11.2 Remove the ten screws (E) that are
located on each side of the chassis and the
ten screws (F) that are located on the top of
the chassis.
(Figures 1, 2, 3, 4)
DISASSEMBLY/ASSEMBLY PROCEDURES

6
DISASSEMBLY/ASSEMBLY PROCEDURES
(Figures 1, 2, 3, 4)
A
A
A
A
A
A
C
B
B
B
BB
B
B
B
D
Figure 1. Bottom Panel
EEE
Figure 2. Side View of Chassis
F
F
F
F
F
FF
F
F
Figure 3. Amplifier Chassis Cover
11.3 Lift the chassis cover up and remove
the connector from the PCB.
12. Amplifier Chassis Cover Replacement
12.1 Align the chassis cover to the chassis
and replace the ten screws (E) that are
located on each side of the chassis and the
ten screws (F) that are located on the top of
the chassis.
13. Bottom Panel Removal
13.1 Perform procedure 1 and 9 first.
13.2 Remove the eight screws (B) and the
four nuts (C) that secure the bottom cover
to the chassis.
13.3 Using a strain relief tool, remove the
two strain reliefs (D) that secure the two
output wires. Lift the bottom cover off.
14. Bottom Panel Replacement
14.1 Feed the wires through the holes in
the bottom panel. Replace the eight screws
(B) and the four nuts (C) that secure the
bottom cover to the chassis.
14.2 Using a strain relief tool, replace the
two strain reliefs (D) that secure the two
output wires.

7
General Test Setup
Caution! There is no mains isolation
transformer in this amplifier! This amplifier
must be isolated from the AC line by a 1.0
kVa or larger isolation transformer during all
testing!
A stancore GIS-1000 or equivalent isolation
transformer should be used for 100VAC and
120VAC units.
A Siemens 4AX24-16-2BK or equivalent
isolation transformer should be used for
230VAC units.
A variac rated 1.0kVA or larger should be
used to vary the line voltage.
Output Loading: Unless otherwise speci-
fied, perform all tests with a series con-
nected 16Ω, 1%, 500 watt resistor and a
1.0mH, 10%, 5 amp rated inductor as the
load.
Input: Unless otherwise specified, apply a
1kHz, 1.0Vrms signal to the amplifiers
unbalanced input.
All output measurements should be made
with a 30kHz, 4 pole low pass filter in series
with the input of the measurement equip-
ment to reject the switching ripple.
1. Switching Frequency
1.1 With out an applied signal, measure the
switching frequency at the amplifier's out-
put. It should be 110kHz to 130kHz. Do not
use the 30kHz low pass filter when perform-
ing this test.
2. Output Ripple
2.1 The level of the switching frequency
should be less than 20Vpp. Do not use the
30kHz low pass filter when performing this
test.
TEST PROCEDURES
Variation Output Voltage
Limit
100V 104.5Vp to 115.5Vp
120V 125.4Vp to 138.6Vp
240V 125.4Vp to 138.6Vp
3. Voltage Limiting
3.1 Apply a 1.0Vrms, 100Hz signal to the
amplifier's input. Measure the output
according to the following table.
4. Current Limiting
4.1 Apply a 1.0Vrms, 100Hz signal to the
amplifier's input and connect an 8Ωresis-
tive load to the output.
4.2 The output voltage should be 80.0Vp
±8.0Vp (corresponding to 10A ±1A).
5. Reference Gain
5.1 Apply a 50mV, 1kHz signal to the
amplifier's input. Reference a dB meter to
the applied signal.
5.2 Measure the output of the amplifier. It
should be 32.0dB ±1.5dB.
6. Frequency Response
6.1 Apply a 50mV, 1kHz signal to the
amplifier's input. Reference a dB meter to
the amplifiers output. Measure the output
according to the following table.
Note: Use the last six digits of the serial
number to determine which table to use.
The serial number is located on the side of
the amplifier as MK01xxx______ or
MZ01xxx______.

8
Use for serial numbers 050121 and above
(later EQ)
Use for serial numbers 050120 below
(earlier EQ)
7. Amplifier Distortion
7.1 Apply a 50Hz, 1kHz and 10kHz signal
to the input of the amplifier at a level to
obtain an output according to the following
table. The distortion measured at the output
should be less than 0.4% at 50Hz and
1kHz and less than 1.0% at 10kHz.
TEST PROCEDURES
8. Hum
8.1 Short all inputs to input ground. The
hum measured at the output should be less
than 4mVrms, "C" weighted.
9. Noise
9.1 Short all inputs to input ground. The
noise measured at the output should be
less than 3mVrms, "A" weighted.
10. Common Mode Rejection Ratio
(CMRR)
10.1 Connect the positive side of a signal
generator to the positive and negative side
of the XLR amplifier input. Apply a 3.0Vrms
60Hz and then a 1kHz signal. Reference a
dB meter to the applied signal.
10.2 The output should be less than
-40dB.
Frequency Output Tolerence
30Hz 0.2dB ±2.5dB
50Hz 17.1dB ±1.5dB
90Hz 12.6dB ±1.5dB
150Hz 11.2dB ±1.5dB
350Hz 4.9dB ±1.5dB
1kHz Reference -
4kHz 14.7dB ±2.7dB
7kHz 13.0dB ±2.7dB
13kHz 22.0dB ±5.0dB
20kHz 14.8dB ±3.0dB
Frequency Output Tolerence
30Hz -4.6dB ±4.0dB
50Hz 13.5dB ±1.8dB
90Hz 10.0dB ±1.8dB
150Hz 11.2dB ±1.8dB
350Hz 4.7dB ±2.0dB
1kHz Reference -
4kHz 14.8db ±3.0dB
7kHz 14.7dB ±3.0dB
13kHz 25.4dB ±5.5dB
20kHz 16.5dB ±4.0dB
Variation Output
Power Reference Voltage Load
100V 300W 70Vrms 16Ω
120V 450W 85Vrms 16Ω
240V 450W 85Vrms 16Ω

9
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 PCB are listed in the 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.
PART LIST NOTES

10
Iten
Number Part Number Description QTY Notes
1 131306 WOOFER ASSY, 12" 1
2 131321-5 DRIVER ASSY, 4.5" 6
3 129028-1 AMP ASSY, PROTON, 120V 1 1, 2
4 142941-AA GRILLE ASSY, PROTON, BLACK 1
5 131075-B1 GASKET, LRG, W/ADH 1
6 135983-08 SCREW, MACH, 8-32x.5, CAP, SOCK 18
7 135984-06 SCREW, MACH, 10-32x.375, BTN, SOC 8
8 135152-16 SCREW, TAPP, 10-10xl, FILL, XRC/SQ 24
9 137923-10 WASHER, FLAT, .219", #10 16
10 131380-B GASKET, PROTON 1
11 172672-12 SCREW, TAPP, 8-llx.75, PAN, XRC/SQ 2
12 133504-10 SCREW, MACH, .25-20x.625, CAP, HEX 1
13 131779 INDUCTOR, 14mH 1 3
14 131948 CAP, DUAL LUG, 240VAC, 10%, 25uF 1 3
15 135339-10 SCREW, MACH, 6-32x.625, PAN, XREC 1
16 121112 CONN, FUSE CLIP, l POS, FEM 2
17 111620 CLIP, CORD, ADH BACKED 1
18 137050 SCREW, THUMB, M8 x l.25x25mm 2
19 134907 WASHER, BEVELED, .255" 1
20 134908 WASHER, FLAT, .260" 2
MAIN ASSEMBLY PART LIST
WIRE HARNESS
ORANGE
BLACK
BLACK/ORANGE
RED
TO AMP GROUND
GREEN
13
14
15
1611
13
12
19
20
20
14
15
SIDE VIEW OF
CROSSOVER
THUMB SCREW
MOUNT
Figure 4. Exploded View

11
Reference
Designator Description Part Number Note
R701, 702, 777,
790, 711, 712, 714,
722, 729, 734, 773,
774, 775, 776, 789,
808, 812
1.0 k, 5%, 1/6 W 139168
R703 270 Ω, 5%, 1/6 W 139389
R704, 733, E35,
N11, N12, 715, 806,
E20
56 Ω, 5%, 1/6 W 139342
R705, 737, 738,
813, E33 2.2 k, 5%, 1/6 W 139178
R706 2.2 k, 5%, 1/6 W 139178
R707 330 k, 5%, 1/6 W 139390
R708, E36, N01,
N02 10 Ω, 5%, 1/6 W 139374
R709, 710 348 k, 2%, 1/4 W 139391 3
R713, 788, 814 10.0 k, 5%, 1/6 W 139169
R716, 780 22.0 k, 5%, 1/6 W 139185
R717, 830, E32,
E34, N09, N10 220 Ω, 5%, 1/6W 139163
R718 15.0 k, 5%,1/6 W 139393
R719, 720 470 k, 5%, 1/6 W 139394 3
R721, 778, 791 1.0 k, 5%, 1/6 W 139168
R723 332 k, 1%, 1/6W 139170
R724 Varistor 138998 3
R725, 726, 796 4.99 k, 1%, 1/6W 139172
R727, 728, 807, E07 10.0 k, 1%, 1/6W 139176
R730 21.0 k, 1%, 1/6W 139173
R731, E12 200 k, 1%, 1/6W 139174
R732 6.65 k, 1%, 1/6W 139175
R735, 736, 743, 799 4.7 k, 5%, 1/6W 139177
R739, 740, 741, 742 680 Ω, 5%, 1/4W 139179
R765, 766 22 Ω, 5%, 3W,
Power 136357 3 100V/120V
R765, 766 15 Ω, 5%, 5W,
Power 139181 3 230V
R767 0.1 Ω, 5%, 5W,
Power 139160 3
R768 27.0 k, 5%, 2W,
Power 136359
R771, 772 10 Ω, 5%, 1/4W 139183
R779 61.9 k, 1%, 1/6W 139184
R781, 782 390 Ω, 5%, 1/4W 139186
R783, 784, 820 100 Ω, 5%, 1/6W 139187
R785, E37 100 k, 5%, 1/6W 139188
R786 3.3 k, 5%, 1/6W 141451
R787 43.2 k, 1%, 1/6W 139189
R792, 811 47.0 k, 5%, 1/6 W 139190
R793, 794, E29 20.0 k, 1%, 1/6 W 139191
R795 4.99 k, 1 %, 1/6 W 139172
R797, 798 18.2k, 1 %, 1/6 W 139192
R801, 802, E40, E41 237 Ω, 1%, 1/6W 139161
R803, 804, E38, E39 1.21 k, 1%, 1/6W 139162
ELECTRICAL PART LIST
Resistors

12
ELECTRICAL PART LIST
Resistors
Reference
Designator Description Part Number Note
R815 2.7 Ω, 5%, 1/2W 139344
RE01, E02 1.0 M, 1 %, 1/6W 139345
RE03, E04 9.09 k, 1%, 1/6W 139346
RE05, E06 1.0 k, 1 %, 1/6W 139347
RE08 10.0 k, 1 %, 1/6W 139176
RE13 23.2 k, 1%, 1/6W 141458
RE14£, E19 7.5 k, 1%, 1/6W 141469 £Used in later EQ
RE14† 475 Ω, 1%, 1/6W 141462 †Used in earlier EQ
RE15 165 k, 1%, 1/6W 139351
RE16 24.3 k, 1%, 1/6W 139352
RE17 2.67 k, 1%, 1/6W 141459
RE18£, E24 59.0 k, 1%, 1/6W 139365 £Used in later EQ
RE18† 56.2 k, 1%, 1/6W 141465 †Used in earlier EQ
RE20† 12.1 k, 1 %, 1/6W 141453 †Used in earlier EQ
RE20£ 11.0k, 1%, 1/6W 139343 £Used in later EQ
RE21 100 k, 1%, 1/6W 141452
RE22† 52.3 k, 1%, 1/6W 141464 †Used in earlier EQ
RE22£ 64.9 k, 1%, 1/6W 141466 £Used in later EQ
RE23£ 4.75 k, 1%, 1/6W 141463 £Used in later EQ
RE23† 4.42 k, 1%, 1/6W 141461 †Used in earlier EQ
RE25£ 6.65 k, 1%, 1/6W 139175 £Used in later EQ
RE25† 13.3 k, 1%, 1/6W 141455 †Used in earlier EQ
RE26 1.74 k, 1%, 1/6W 141456
RE27 3.09 k, 1%, 1/6W 141460
RE28 60.4 k, 1%, 1/6W 139369
RE30£ 1.33 k, 1%, 1/6W 141454 £Used in later EQ
RE30† 2.0 k, 5%, 1/6W 141457 †Used in earlier EQ
RE31£ 681 Ω, 1%, 1/6W 141468 £Used in later EQ
RE31† 665 Ω, 1%, 1/6W 141467 †Used in earlier EQ
RE42 100 Ω, 5%, 2W 139361
RE43 470 Ω, 5%, 1/2W 141439 230V
RE43 1.0 k, 5%, 1/2W 139164 100V/120V
RE51 2.7 k, 5%, 1/2W 136356
RN03, N04, N05,
N06 470 Ω, 5%, 1/6W 139376
RN07, N08 2.7 k, 5%, 1/6W 139377
RN13, N14 39.0 k, Rotor, 5%,
3W 136362
RW51 220 k, Hi-Volt, 10%,
1/4W 141450 3
Capacitors
Reference
Designator Description Part Number Note
C001, 002 0.22 uF, Film, 400 V 139381 3
100V/120V
C010,011 2200 pF, Ceram,
125V/250V 139382 3 100V/120V

13
ELECTRICAL PART LIST
Capacitor
Reference
Designator Description Part Number Note
C770†, 771†, 781‡
782‡, 784, W51¥,
W52¥, W53¥,
W54¥, W55¥
1000 pF, Ceram,
10%, 250 V 139156 3 ¥230V
‡100V/120V
†Used in earlier EQ
C701, 754, 755,
E11£ F 1500 pF, Film, 5% 139395 £Used in later EQ
C702 100 uF, Elect, 10V 136350
C703, 704, 766,
E98, E99 100 pF, Ceram, 10% 139397
C705, E07, E08,
E25 0.47 uF, Film, 5% 139398
C706 47 uF, Elect, 25 V 136351
C707, 713, E10£,
708 1000 pF, Film, 5% 139400 £Used in later EQ
C709, E24 270 pF, Ceram,
10% 139402
C710 820 pF, Film, 5% 139403
C712, 714 22 pF, Ceram, 5% 139404
C715, 716 330 pF, Ceram,
10% 139405
C717, 718, 753 680 pF, Ceram,
10% 139406
C719, 720, 721, 722 2200 pF, Ceram,
10% 139407
C731, 732 390 pF, Ceram,
10% 139408 3 100V/120V
C731, 732 1000pF, Ceram,
10% 139409 3 230V
C733, 734, 735, 736 1000uF, Elect, 200V 136352
C739, 740 0.1uF, Film, 10%,
400V 139411
C741, 742 470 pF, Ceram,
10% 139413
C743, N01, N02,
N07, N08 0.1 uF, Film, 5% 139412
C744, 752, E23 220 pF, Ceram,
10% 139417
C746, 747, E27,
E28 1000 uF, Elect, 25V 136355
C748, 749, 760,
E29, E30 220 uF, Elect, 25V 136353
C750, 762, 763,
764, 767, 768, E41 22uF, Elect, 25V 136354
C751 2200 pF, Ceram,
10% 139419
C756 0.68 uF, Film, 20%,
250V 139420
C781, 782 470 pF, Ceram,
10%, 250V 139157 3 230V
C783 0.01 uF, Ceram,
80%, 20% 139158
CE01†, E02† 4.7uF, Elect, 5%,
100V 141448 †Used in earlier EQ
CE01£, E02† 0.27uF, 5% 139422 £Used in later EQ

14
ELECTRICAL PART LIST
Reference
Designator Description Part Number Note
CE03, E04 1000 pF, Ceram,
10% 139421
CE05, E06 470 pF, Film, 5% 139423
CE09£, E17£ 5600 pF, Film, 5% 141446 £Used in later EQ
CE09†, E17† 4700 pF, 5% 141445 †Used in earlier EQ
CE10£, E16†, E22 47 pF, Ceram, 5% 139428 £Used in later EQ
†Used in earlier EQ
CE11† 2200 pF, Film, 5% 141441 †Used in earlier EQ
CE12£ 0.039 uF, Film, 5% 141444 £Used in later EQ
CE12† 0.033 uF, Film, 5% 139429 †Used in earlier EQ
CE13£, E15, E18† 0.022 uF, Film, 5% 141442 £Used in later EQ
†Used in earlier EQ
CE13†, E18£ 0.027 uF, Film, 5% 141443 †Used in earlier EQ
£Used in later EQ
CE14£, E19†, E26 0.01 uF, Film, 5% 139427 £Used in later EQ
†Used in earlier EQ
CE14†, E19£ 8200 pF, Film, 5% 141447 †Used in earlier EQ
£Used in later EQ
CE16£ 82 pF, Ceram, 5% 141440 £Used in later EQ
CE20 0.015 uF, Film, 5% 139430
CE21 0.012 uF, Film, 5% 139431
CN03, N04 100 pF, Ceram,
10%, 500V 139432
CN05, N06 4700 pF, Ceram,
10% 139433
Diodes
Capacitor
Reference
Designator Description Part Number Note
D010 S10V860 136332 3
D702, 703, 704,
705, 706, 707, 727,
728, 729, 730, 731,
732, 733, 744, E01,
E02, E03, E04, N01,
N02, N03, N04,
N05, N06, N07,
N08, N09, N10,
N11, N12, N13,
N14, N15, N16,
N17, N18
1SS136 136310
D720, 721, 722, 723 BYV29-400 136311
D724, 725 M.O.V., 150V,
V150LA20A 138055 3 120V/230V
D724, 725 M.O.V., 130V,
V130LA20A 138054 3 100V
D735 Zener Diode, 7.5V 136308
D736, 737, 738,
739, E05, E06, E07,
E08, E09
DSF10C 132660
DE10 L.E. D. Green 136330 3
230V

15
Reference
Designator Description Part Number Note
DE10 L.E.D. Red 136330 3
100V/120V
Reference
Designator Description Part Number Note
L701, 702, 703, 704,
705 Transformer, Pulse 136339 3
L706, 708 Transformer (Coil) 136341 3
100V/120V
L708, W51 Transformer (Coil)
SC-4-200JV 136342 3 230V
L709 Transformer, Power,
110V 136343 3 120V
L709 Transformer, Power,
230V 136344 3 230V
Reference
Designator Description Part Number Note
Q701, E02 IC, IR91308 136312
Q702, 705, 713,
N03, N04 Transistor, NPN, 2SC536SP (F,G) 136313
Q703, 704 Transistor, PNP,
2SA608SP (F,G) 136314
Q709 IC, CA3280E 136315
Q710 Transistor, PNP,
2SA1246 (S,T,U) 136316
Q711 Transistor, NPN,
2SC3114 (S,T,U) 136317
Q712 IC, IR9319 136318
Q714 IC, 4041 136319
Q715, 716 IC, 4066 136320
Q717 IC, uPC4074 136321
Q718 IC, 4093 136322
Q719, 720, 721 Transistor, NPN,
2SC3328 (O,Y) 136323
Q732, 733 F. E.T., 2SK694 136324 3
Q734, E05 IC, +Regulator,
uPC317H 136331
Q735, E06 IC, -Regulator,
IlPC337H 138231
QE01 IC, uPC4574C 136325
QN01, 02 Transistor, PNP,
2SA1315 (O,Y) 136328
QN05, 06 F.E.T., 2SK246
(GR) 136327
QN07, 08 Transistor, NPN,
2SC2236 (O,Y) 136329
ELECTRICAL PART LIST
Transistor
Inductors
Diodes

16
Reference
Designator Description Part Number Note
F781, E01, E02 Ferrite Core 139146
F701, 702 Fuse, 10A, 250V,
0.25" x 1.25" 138992 3 120V
F701, 702 Fuse, 5A, 250V,
5mm x 20 mm 138991 3 230V
F701, 702 Fuse 10A 141449 3
100V
S001 Push Switch, Power 136338 3
W001 A.C. Power Cord,
120VAC Version 138993 3 120V
W001 A.C. Power Cord,
230VAC Version 138994 3 230V
W001 A.C. Power Cord,
100VAC Version 138995 3 100V
JE52 Jack, Output, 1/4" 135336
JO41 Jack, Input, XLR 136333
JO42 Jack, Output, XLR 136334
JO92 Plug, AC Inlet 136337 3
_ Button, Power
Switch 139436
_ Lens, Power Led 139438
_ Strain Relief 139440
Reference
Designator Description Part Number Note
L709 Transformer, Power,
100V 136345 3 100V
LE01 Transformer, Input 136340 3
LE02 Transformer, Power,
110V 136346 3 120V
LE02 Transformer, Power,
230V 136347 3 230V
LE02 Transformer, Power,
230V 136348 3 100V
ELECTRICAL PART LIST
Inductors
Miscellaneous

17
PACKAGING
Item
Number Descrition Part Number Qty
1 Carton 140022 1
2 Front and Rear 140024 2
3 Creased Sheet 140025 2
4 Polybag 133174 1
5 Top and Bottom 140026 2
6 Sides 140023 2
Figure 6. Packaging View
Figure 7. Wiring Schematic
+
+
+
+
+
+
-
-
-
-
-
-
+
-
From Amplifier
+
-
To Amplifier Chassis
Green
Baffle
BLK/ORG
Black
Red
Orange
Red
Black
Yellow
x5
3
2
1
6
5
4
25uF
1mH
Figure 8. Driver Location
1
2354
6

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
®
®
Bose Corporation
The Mountain
Framingham Massachusetts USA 01701
P/N 141566 REV. 01 04/97 FOR TECHNICALASSISTANCE OR PART ORDERS, CALL 1-800-367-4008

©1997 Bose Corporation
Acoustimass®Professional Powered
Speaker System
®
®
Service Manual
Part Number 141566 REV 01