Bose Acoustimass 10 Series I User manual

1
Contents
Specifications................................................................................................................................... 2
Acoustimass®10 Bass Module Description .................................................................................. 3
Figure 1. AM-10 Bass Module......................................................................................................... 4
Disassembly/Assembly Procedures ........................................................................................... 5-6
Figure 2. Bass Module Exploded View ........................................................................................... 7
Figure 3. Cube Array Exploded View .............................................................................................. 7
Test Procedures ............................................................................................................................ 8-9
Part List Notes................................................................................................................................ 10
AM-10 Bass Module Part List........................................................................................................ 11
Figure 4. Bass Module Exploded View .......................................................................................... 11
Crossover Part List ........................................................................................................................ 12
Figure 5. Schematic Diagram REV 01 .......................................................................................... 12
Crossover Mechanical Part List.................................................................................................... 13
Figure 6. Crossover PCB Mechanical Layout ............................................................................... 13
Figure 7. Crossover PCB Etch Layout REV 01............................................................................. 13
Cube Array Part List....................................................................................................................... 14
Figure 8. CubeArray Exploded View ............................................................................................. 14
AM-10 Packaging Part List ............................................................................................................ 15
Figure 9. Packaging Exploded View .............................................................................................. 15
This service manual has been updated with information from supplement 188532-S1.
This affects part numbers for the satellite speaker pivot o-ring, the satellite connectors and the
surround and center channel satellite Twiddlers. These changes resulted in changing the
service manual revision from Rev. 00 to Rev. 01.
This service manual has also been updated with information from supplement 188532-S2.
This affects part numbers for the woofers used in the bass module.
Part number change per supplement 188532-S3 11/2000

2
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE®CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BYANAUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALLNOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
SPECIFICATIONS
Dimensions
Cube Arrays: 6.3" x 3.0" x 4.8" (16 x 7.62 x 12.2 cm)
Bass Module: 13" x 7.5" x 20.5" (33 x 19 x 52.1 cm)
Weight
Single Cube: 2.1 lbs (0.91 kg)
Bass Module: 23 lbs (10.5 kg)
Packed System: 40 lbs (18.2 kg)
Crossover Frequencies
Cubes: (L& R) 300Hz at 6 dB/Oct (CTR, SURR) 200Hz at 6 dB/Oct
System Protection
Left, Right, Center and Surround: PTC and Lamps
Cube Protection
Left and Right: Lamps
Center and Surround: None
Impedance 6Ωnominal, 4.8Ωminimum from 20Hz to 20kHz
Power Handling
Left, Center, and Right Channels: 100W continuous per IEC-268-5, Recommended amp/receiver
power 10-200 watts/channel
Left and Right Surround Channels: 50W continuous per IEC-268-5, Recommended amp/receiver
power 10-100 watts/channel
Flux Leakage (Cubes): 2.0 Gauss max. at 30 mm from any surface of the cube

3
Acoustimass®10 Bass Module Description
(Refer to Figure 1)
Left woofer
Reproduces all left channel low frequency information. This woofer is loaded by the
Acoustimass 10 enclosure in such a way as to produce deep bass energy.
Right woofer
Reproduces all right channel low frequency information. This woofer is loaded by the
Acoustimass 10 enclosure in such a way as to produce deep bass energy.
Surround woofer
Reproduces all left and right surround channel low frequency information. This woofer
uses a dual voice coil that electromagnetically sums the left and right surround channel
bass energy. The woofer cone then reproduces the summed left and right surround
channel and sends it into the energy summing chamber (acoustic spring C).
Acoustic Spring A
This is the volume of air in the rear chamber (in front of the left and right channel
woofers). This volume of air acts like a spring and acoustically couples the fronts of the
left and right woofers to acoustic mass A.
Acoustic Mass A
This is the longer of the two internal ports and, together with Acoustic spring A, serves
to reproduce the lower frequencies of the bass module, while reducing the cone
excursion of the left and right woofers over this lower frequency range (35Hz to 60Hz).
Acoustic Spring B
This is the volume of air in the middle chamber (behind the left and right channel
woofers). This volume of air acts like a spring and acoustically couples the rear of the
left and right woofers to acoustic mass B.
Acoustic Mass B
This is the shorter of the two internal ports and, together with Acoustic spring B, serves
to reproduce the upper frequencies of the bass module, while reducing the cone
excursion of the left and right woofers over this upper frequency range (120Hz to
200Hz).
Acoustic Spring C (The Energy Summing Chamber)
This is the front most volume of air inside theAM-10 bass module. This is where the bass is
summed. Within this chamber, the front channel bass energy is received via acoustic mass A
and B, the surround channel bass energy is received directly from the surround woofer.

4
All front and surround channel bass energy is summed within this chamber in much the
same way as a room would sum the bass energy from two separate bass modules. The
key difference with internal bass summing is the results of summation are much better
controlled because the summation conditions are already known (in a room with two
bass sources, their distance from each other and their location within the room heavily
influence bass summation and the loudspeaker designer cannot predict that ahead of
time).
Another important purpose of this chamber is it interacts withAcoustic Mass C to
provide an extra stage of low pass filtering to create a steeper high frequency roll off
slope for the bass module, which serves to reduce localization.
Acoustic Mass C
This is the exit port of the bass module and serves to launch the bass energy into the
room on a column of air (purifying, of course). This port also interacts withAcoustic
Spring C to reproduce the middle range of frequencies of the bass module, while
reducing the cone excursion of all the woofers over this middle range (60Hz to 120Hz).
This port is flared to eliminate any internal air turbulence, which significantly improves
the efficiency of the entire bass module at high listening levels.
Acoustic Spring D
This is the volume of air enclosing the rear portion of the surround channel woofer. Its
main purpose is to load the surround woofer and to help reduce cone excursion.
Acoustic Mass A Acoustic Mass B
Acoustic Mass C
Acoustic Spring A
(Rear chamber)
Acoustic Spring B
(Middle chamber)
Acoustic Spring C
(summing chamber)
Acoustic Spring D
Surround Channel Woofer
Left Channel Woofer
Right Channel Woofer
Figure 1. AM-10 Bass Module

5
DISASSEMBLY/ASSEMBLY PROCEDURES
BASS MODULE
Note: Numbers in parentheses correspond
to the item call outs in Figure 2.
1. Terminal Cup Removal
1.1 Remove the eight screws (6) that
secure the terminal cup (5) to the bass
module.
1.2 Lift up on the terminal cup at the end
where the input connections are located.
Disconnect the two cables from the PCB
(2).
1.3 Lift the terminal cup out of the bass
box in the direction of the input connectors.
2. Terminal Cup Replacement
2.1 Lower the terminal cup (5) into the
bass box so that the PCB (2) enters first.
2.2 Replace the two connectors that attach
to the PCB (2). The wire color sequence
label next to the connector should match
the wires on the cable.
2.3 Replace the eight screws (6) that
secure the terminal cup to the bass mod-
ule.
3. Crossover PCB Removal
3.1 Perform procedure 1 first.
3.2 Remove the three screws (1) that
secure the PCB (2) to the terminal cup (5).
3.3 Lift the PCB straight up. It might be
necessary to slightly wiggle the PCB back
and forth.
4. Crossover PCB Replacement
4.1 Place the PCB (2) onto the terminal
cup (5) so that the lamps overhang the
output terminal end. Make certain that the
20 pins on the terminal cup line up with the
PCB. Press the PCB and the terminal cup
together.
4.2 To prevent buzzes, make certain that
the lamps are not touching one another.
4.3 Replace the three screws (1) that
secure the PCB to the terminal cup.
5. Woofer Removal
5.1 Perform procedure 1 first.
5.2 Remove the four screws (6) that
secure the woofer (3) to the baffle.
5.3 Lift the woofer out and cut the wires on
both sides of the baffle as close as possible
to the baffle.
Note: Do not cut the wires going to the
surround woofer.
6. Woofer Replacement
6.1 Drill a hole in the baffle, close to the
hole where the woofer wires are fed
through the baffle.
6.2 Insert the new wire harness (part
number 187097) into the hole and connect
it to the woofers (3). Apply Mortite to the
hole in the baffle to prevent air leaks
around the new wire harness hole.
6.3 Replace the four screws (6) that
secure the woofer to the baffle.
6.4 Perform procedure 2.

6
DISASSEMBLY/ASSEMBLY PROCEDURES
CUBE ARRAY
Note: Numbers in parentheses correspond
to the item call outs in Figure 3.
1. Grille Removal
1.1 Grasp the grille (13) at the top and
bottom. Catches on the sides hold the grille
to the cube (2). Squeeze and pull the grille
off.
2. Grille Replacement
2.1 Line up the grille (13) so that the
curved edges are located at the top and
bottom. Push the grille onto the cube (2)
until it snaps into place. The bottom grille
should have the Bose® logo in the lower
right hand corner.
2. Twiddler™ Removal
2.1 Perform procedure 1 first.
2.2 Remove the four screws (9) that
secure the twiddler (11) to the cube array
(2). Lift the twiddler out of the cube array.
2.3 Cut the wires as close as possible to
the twiddler.
Note: Make a note of the wiring configura-
tion.
3. Twiddler Replacement
3.1 Connect the wires to the twiddler (11).
3.2 Replace the four screws (9) that
secure the twiddler to the cube array (2).
3.3 Perform procedure 2.

7
Figure 3. Cube Array Exploded View
SURROUND WOOFER
(NOT SERVICEABLE)
BAFFLE
REMOVE WOOFER
THROUGH OPENING
1
6
582
34
7
6
Figure 2. Bass Module Exploded View
1
2
12
9
10
5
6
3
11
4
BLACK
GRAY BLACK
RED
GRAY
RED
(8X)
(4X)
(2X)
(2X)
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8
13
13

8
TEST PROCEDURES
1. Woofer Rub and Tick Test
1.1 Apply a 10Vrms, 10Hz signal to the
front left and right input.
Note: No extraneous noises such as
rubbing, scraping or ticking should be
heard. To distinguish between normal
suspension noise, rubs and ticks, displace
the cone on the woofer with your finger. If
the sound can be made to go away or get
worse, it's a rub or tick and the woofer
should be replaced. If the noise stays the
same, it's normal suspension noise and it
will not be heard with regular program
material. Perform this test for the surround
channel.
2. Power Sweep Test
2.1 Apply a 10Vrms, 10Hz signal to all the
bass module inputs.
2.2 Sweep the oscillator slowly from 10Hz
to 1KHz and back to 10Hz.
2.3 Listen carefully for any buzzes, rattles
or extraneous noises coming from the bass
module or cubes.
Note: Redress any wire or component that
buzzes.
3. Woofer Phase Test, Front Channels
3.1 Apply a 10Vrms, 50Hz signal to the left
and right front channels.
3.2 Disconnect the right channel. If the
sound output from the bass module drops
by approximately 1/2, the woofer is in
phase. If the sound output from the bass
module increases, stays the same or stops
completely, the woofer may be wired
incorrectly or be defective.
4. Woofer Phase Test, Surround Channel
4.1 Apply a 10Vrms, 50Hz signal to the left
and right surround channels.
4.2 Disconnect the left surround channel. If
the sound output from the bass module
drops by 1/2, the woofer is in phase. If the
sound output from the bass module in-
creases, stays the same or stops com-
pletely, check for incorrect wiring at the
crossover assembly.
Note: The surround woofer is not service-
able.
5. Air Leak Test
5.1 Apply a 10Vrms, 10Hz signal to the left
and right surround channel input.
5.2 Listen at the bass module port for
internal air leaks coming from inside the
unit.
5.3 Apply a 10Vrms, 50Hz signal to all the
bass module inputs.
5.4 Listen for air leaks from the bass
module.
6. Twiddler™ Phase Test
6.1 Apply 9V DC to the cube input termi-
nal. Connect the positive side of the DC
supply to the positive side of the cube.
Connect the negative side of the DC supply
to the negative side of the cube. The
twiddler should move outward.
Note: The DC voltage should only be
momentarily applied to avoid possible
damage to the twiddler.

9
7. Crossover Test
7.1 Both woofer harnesses should be
disconnected. Connect an 8.2Ωresistive
load to the cube speaker output being
tested. Apply a 1Vrms signal to the input at
the frequency listed in the following table.
Reference a dB meter to the applied signal.
Measure the output listed in the following
table.
TEST PROCEDURES
Input/Output Frequency Min
(dB) Max (dB)
Left or Right 200Hz -6 -4
Left or Right 2kHz -4.9 -3.8
Center, Left and
Right Surround 200Hz -1.5 -0.5
Center, Left and
Right Surround 2kHz -2.2 -0.8
Note: If the Crossover fails any of these
tests, refer to the table below.
Input/Output
Frequency Check
Left or Right
200Hz C11,12 Left Channel C31, 32 Right Channel
Left or Right
2kHz C13, L11, R11 Left Channel C33, L31, R31 Right Channel
Center, Left and
Right Surround
200Hz
C21, C22 Center Channel
C41, C42 Left Surr Channel
C51, C52 Right Surr Channel
Center, Left and
Right Surround
2kHz
C23, L21, R21 Center Channel
C43, L41, R41 Left Surr Channel
C53, L51, R51 Right Surr Channel

10
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 PCB are listed in the part list.

11
AM-10 BASS MODULE PART LIST
SURROUND WOOFER
(NOT SERVICEABLE)
BAFFLE
REMOVE WOOFER
THROUGH OPENING
1
6
582
3
4
7
6
Figure 4. Bass Module Exploded View
Item
Number Description  Part Number Notes
1 Screw, Tapp, 6-13 x .375, pan 172783-06
2Crossover Assy 187854-01 1, 2
3 Woofer, 5.25" 141393
4 Gasket, Woofer 104794-08
5 Terminal Cup 183641-1
6 Screw, Tapp, 8-11 x .75, Pan 172672-12
7 Grommet 117995
8 Bumper 187093
- Harness Assy, Main 187097
- Harness Assy, Surround 187098

12
CROSSOVER PART LIST
Figure 5. Schematic Diagram REV 01
PTC11 YELLOW
GREEN
ORANGE
BROWN
RED
GREY
WHITE
BLACK
RIGHT
CHANNEL
CHANNEL
LEFT
RIGHT SURROUND
CENTER
LEFT SURROUND
CHANNEL
CHANNEL
CHANNEL
2
H1
1
H1
3
H1
4
H1
4
H2
2
H2
1
H2
3
H2
DS51
1.5A
DS21
1.5A
DS41
1.5A
DS11
2.5A
DS12
2.5A DS13
2.5A
DS33
2.5A
DS32
2.5A
DS31
2.5A
C51
100uF
C52
100uF
C53
22uF
C21
100uF
C22
100uF
C23
22uF
C43
22uF
C42
100uF
C41
100uF
C11
33uF
C12
33uF
C13
15uF
C33
15uF
C32
33uF
C31
33uF
R51
6.8
R21
6.8
R41
6.8
R11
5.1
R31
5.1
L51
125uH
L21
125uH
L41
125uH
L11
300uH
L31
300uH
PTC51
PTC41
PTC21
PTC31
IN5+ OUT5+
OUT5-
IN4- OUT4-
OUT4+IN4+
IN2+ OUT2+
OUT2-
IN2-
IN5-
IN1+ OUT1+
OUT1-IN1-
IN3- OUT3-
OUT3+
IN3+
12
3
12
3
1
2
3
3
Reference
Designator Description Part Number
PTC 11, 31 Polyswitch, 50V, 4mm 175233-1
PTC 21, 41, 51 Polyswitch, 60V, Disc, Rad 147185
DS11-13, 31-33 Lamp, 2.5A, 24VDC 117805
DS21, 41, 51 Lamp 141989
C21, 22, 41, 42, 51,
52 100uF, 50V, 20%, EL, BP, 85 142065
C11, 12, 31, 32 33uF, 50V, 20%, EL, BP, 85 131974
C23, 43, 53 22uF, 50V, EL, BP 142300
C13, 33 15uF, 50V, 20%, EL, BP, 85 132079
R11, 31 5.1Ω, 5W, 10% 132105-5R1
R21, 41, 51 6.8Ω, 5W, 10% 132105-6R8
L21, 41, 51 125uH 187756
L11, 31 300uH 131973

Item
Number
Description Part
Number
QTY See
Note
1 Conn, Terminal, 1 POS, Female 147946 20
2 Conn, Header, .15 137489-04 2
3 Tape, Foil, /Liner 134636 3 1
4 asher, Flat, .141", #5 108258-05 5
5 Screw, Mach, 4-40 x 1, Pan, Xrec 103146-16 5
6 Nut, Hex, 4-40 103234-440 5
CROSSOVER MECHANICAL PART LIST
igure 7. Crossover PCB Etch Layout REV 01
igure 6. Crossover PCB Mechanical Layout
4
(5)
6
5
(5)
(5)
3(3)
1(20)
2(2)
13

14
1
2
12
9
10
5
6
3
11
4
BLACK
GRAY BLACK
RED
GRAY
RED
(8X)
(4X)
(2X)
(2X)
7
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8
13
13
CUBE ARRAY PART LIST
Figure 8. Cube Array Exploded View
Item
Number Description Part Number Notes
1 Encl., Lower, Black 141396-1 1
Encl., Lower, Arctic White 141396-2
2 Encl., Upper, Black 141397-1 1
Encl., Upper, Arctic White 141397-2
3 Pivot, Black 182604-1
4 Baffle, Red 173188-1 1
Baffle, Black 141398-1
5 Washer, Black 141402-1
Washer, Flat White 141402-2
6 O-Ring, Pivot 141403
7 Nameplate, Black 184247-1
Nameplate, Arctic White 148949-2
8Conn., Terminal, Main 190550-001 11/2000
Conn., Terminal, Surr, Cent 190549-001
9 Screw, Tapp, 8-11 x .625 172672-10
10 Batting 144225 1
11 Twiddler™, Main 184473
Twiddler, Surr, Cent 184478
12 Threaded Insert 139612 1
13 Grille, Black 175177-1
Grille, Arctic White 175177-2

15
Figure 9. Packaging Exploded View
AM-10 PACKAGING PART LIST
20
21
9
(2)
(2)
2
17
14
13
12
1110
1
18
3
4
19
5
(3)
16
15
(2)
678
Satellite Tray Pack
Satellite Tray Pack
Item
Number Description Part Number QTY/ Assy
1 Bumper, Recessed, Foot 142839 4
2 Carton, 2SC, AM10 184913-00 1
3 Bag, Poly, 13 x 33.5 x 11.5 x 3 mil 137847 1
4 Packing, Corner Post, Bass Mod 148044 2
5 Tray, Packing, Kraft 184914 1
6 Cable Assy, 20' x 5, RCA, BLK 183655-1 1
Cable Assy, 20' x 5, RCA, WHT 183655-2
7 Cable Assy, 20' x 3, RCA, BLK 183656-1 1
Cable Assy, 20' x 3, RCA, WHT 183656-2
8 Cable Assy, 50' x 2, RCA, BLK 183657-1 1
Cable Assy, 50' x 2, RCA, WHT 183657-2
9 Guide, Quickstart, AM-10 183643 1
10 Manual, Owners, AM-10 183644 1
11 Bag, Poly, 14.38 x 9.87 x 2 mil 103351 1
12 Card, Info, Warranty, U.S. 181357 1
Card, Info, Warranty, Multi Lang 181460 1
13 Brochure, All Products 141478 1
14 List, Warranty Service Stations 122766 1
15 Satellite Assy, Main, BLK 183650-1 2
Satellite Assy, Main, WHT 183650-2
16 Satellite Assy, Surr, BLK 183649-1 3
Satellite Assy, Surr, WHT 183649-2
17 Foot, Clear, .312 x .085 178321-04 1pkg
18 Packing, Insert, EPS Bass Mod 184912 2
19 Cover, AM-10, BLK
Cover, AM-10, BLK 187096-1 187096-2 1
20 Carton, Cube, Main
Carton Cube, Surround 148365 183659 2 3
21 Poly Bag, Cube 144677 5

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
®
BOSE CORPORATION
THE MOUNTAIN
FRAMINGHAM, MASSACHUSETTS USA 01701
P/N 188532 7/96: REV. 01FOR TECHNICALASSISTANCE OR PARTORDERS, CALL1-800-367-4008

®
Service Manual
Part Number 188532
©1996 Bose Corporation
ACOUSTIMASS®-10 HOME THEATER
SPEAKER SYSTEM