Page 1
-BIISE7
802 Professional
Loudspeaker System
SPECIFICATIONS
GENERAL
The BOSE802 Professional Loudspeaker
System consists of two speaker enclosures (cabinets) and a separate Active
Equalizer. Each cabinet contains eight
identical high-efficiency, fUll-range
drivers. The drivers each have an impedance of one ohm and are wired in
series to give a system impedance of
eight ohms. The cabinet also includes
an Impedance Control Capacitor which
controls the system impedance at high
frequencies, reducing the amplifier
power requirements of the system.
Each driver has a molded, high-impact
polymer frame that reduces flux
leakage to maintain high efficiency.
The driver voice coils are made of flat
aluminum ribbon, edge-wound on an
aluminum bobbin for high efficiency
and high power handling ability. Each
driver has a 12-ounce ceramic magnet
for high efficiency and resistance to
demagnetization.
Each enclosure incorporates two Reac-
tive Air Columns that function to
reduce driver cone excursion at very
low frequencies. This allows the 802 to
produce high output levels at deep
bass' frequencies
distortion.
with a minimum of
The cabinet is composed of mica-filled,
high-density polyethylene structural
foam. This reinforced polymer material
combines light weight, high strength,
and impact resistance for ruggedness
in transportation.
The 802-E Equalizer adjusts the spec-
trum of the audio signal, permitting the
flat
802 system to provide broad,
quency response without using woofers,
horns, or crossover networks that cause
audible coloration. The Equalizer must
be used with the system to achieve
satisfactory performance.
fre-
EQUALIZER
Dimensions:
25.4 cm (10")
x 4.8 cm (1-7/8") H
Weight:
.738 Kg (1.6 Ibs.)
Input Impedance:
4 K ohms (balanced inputs),
50 K ohms (unbalanced inputs)
Output Level:
5 volts into 2 K ohms or higher,
3.5 volts
Gain:
(See Frequency Response Graph)
W x 12.7 cm (5") 0
into
600 ohms.
802-E
EQUALIZER
FREQUENCY
-l~OHt
30 40 60 100 ZOO
Power Requirement:
3.5 Watts, 110 V AC or
V AC (not available in
220
SPEAKER
Dimensions:
41 cm
400
600
FREOUENCY
SYSTEM
(16-1/8") x 51 cm (20-1/4")
x 34 em (13-1/4") with cover
Weight:
16 Kg (36 Ibs.)
Driver Complement:
4-1/2" full-range drivers
8
Impedance:
8 ohms
Magnet Weight:
2.7 Kg (96 ounces) total
Power Handling:
160 Watts continuous
Amplifier Power:
300 Watts maximum
RESPONSE
lkHt
2 :3 4 6 8 10 20
U.S.A.)
© 1979 Bose Corporation
Page 2
Figure 1 SPEAKERSCHEMATIC
Figure 2 DRIVERPLACEMENT (FRONT VIEW)
I. DISASSEMBLY PROCEDURE
1. GRILLE":'" Remove the two clinch
center. Carefully remove the grille and place in a safe location until needed for reassembly.
2. BACK PANEL - Remove drivers two (2)and three (3) to obtain access to the internal rear panel connections. This will provide access
for repairs associated with the internal connections of the back panel.
3. IMPEDANCE CONTROL NETWORK - Remove drivers two (2) and three (3) to obtain access to the impedance control assembly. This
will allow a continuity check of the bulb
nuts
and grille retainer holding the grille in place.
circuit
and a check of the wiring and impedance control capacitor.
Lift
the grille by pulling from the hole in the grille's
II. TEST PROCEDURE
1. CONTINUITY CHECK - An open driver may be detected by using an ohmmeter and checking continuity. Insert a phone jack in the rear
of the speaker and check continuity by carefully penetrating the black cement covering the flexible conductor on the surface of each
cone
with
Figures 1 and 2.
2. POWER CHECK - Using a 50-watt (20 volt) sine wave signal, sweep the range between 40 and 200 Hz. Check for rattles, buzzing or
voice coil rubbing. Reduce the
ing a sine wave signal on the 802 Speaker System, do not operate the speaker below 80 Hz at levels greater than 20 watts (12.6volts) as
possible damage to the drivers may occur.
3. PHASING CHECK - Using a 6- to 20-volt battery or DC power supply, check that all speakers are in phase (moving together). Connect
the positive portion of the power supply to the
"sleeve" terminal of the phone jack. This will produce an outward motion of all drivers. See Figure 1.
4. IMPEDANCE CONTROL NETWORK - Check the bulb circuitry and wiring of the impedance control circuitry by using an 8 kHz sine
wave signal at 2V RMS
Insert a 0.5 ohm ± 1% resistor in series with the ground lead for the speaker. A voltage drop of 60-77 mV RMS should be measured
across the resistor. If incorrect, check the bulb(s) and capacitor.
an ohmmeter lead. Check continuity between each driver and the speaker terminals until the open driver is detected. See
output
to 5 watts (6.5 volts), and continue to sweep the range between 200 and 16,000 Hz. Note: When us-
"tip"
terminal of the phone jack and the ground connection of the power supply to the
± 1%.
III. SERVICE NOTES
1. When replacing 802 drivers, be certain to use the 802 driver gasket (Part number 110943)to properly seal the driver to the 802 cabinet.
2. Check the coupling control inserts for dirt or dust. If they are clogged, replace them with the spares provided in the top cover of the 802
speaker. Extra coupling control inserts may be obtained through the BOSE Customer Service Department or your BOSE Professional
Products Dealer. One of the unusual features of the 802 is the use of the coupling control inserts. These are polyester
which are installed in the Reactive
of the system.
After
prolonged use, these inserts and their gauze covers may become plugged with dirt or dust, causing them to lose their effec-
tiveness. This results in a
The inserts may be easily removed for inspection or replacement (two spare sets of inserts are supplied with the 802): (See Figure 3):
a. Remove the two clinch nuts by rotating them counter-clockwise.
b. Remove the grille retainer and the grille.
c. Remove the two column extenders by pinching both release tabs and pulling gently. Do not use sharp tools as they could damage
the
thin
seal lip.
d. Remove the snap caps from the column extenders by prying them
e. Examine the coupling control inserts for
f. Wash the gauze-covered ends of the column extenders by swishing them around in warm, soapy water. Rinse in clear water and
allow them to air-dry thoroughly.
g. Reassemble the system by reversing the above procedure, pushing the column extenders in firmly until they snap into place.
Be certain to center the grille retainer before tightening the clinch nuts. Tighten the clinch nuts
h. Extra coupling control inserts may be obtained through the BOSE Customer Service Department or your BOSE Professional Pro-
ducts Dealer.
This is the only periodic maintenance required by the 802 system.
"buzzing"
Air
Columns. Their purpose is to decouple the drivers from one another near the resonant frequency
sound during heavy bass passages.
off
gently with your fingernails.
dirt
or dust. If they are clogged, replace them with the spares provided.
firmly
but
not
"fuzz"
excessively.
discs
Page 3
CLINCH NUTS
--
_
GRILLE RETAINER
GRILLE PANEL
_------Il~
_------1111.2:
COLUMN EXTENDERS
COUPLING CONTROL
INSERTS-________
---
..........:::=:~
-
~
I
-
..
-=-.-.,......:=-:
SNAP CAPS
Page 4
PARTS
109466
174166-01 BLACK,
174166-02 WHITE
802 III cover 252389-01
LIST
SYMBOL
R1,2
R3
R128, 328
R121, 321
R120, 320
B113, 313
R124, 125,
324, 325
R122, 126,
322, 326
R118, 119,
318, 319
R112, 312
R114, 314
R123, 323
R111,311
R101, 103,
301, 303
R107, 307
R108, 308
R110, 310
R109, 309
R104, 105,
127, 137,
304, 305
R106, 306
R115, 315
C1
C2, 7, 8 CER
C3,4
C5,6
C112, 117,
312, 317
C118, 319
C106, 107,
108, 306,
307, 308
C110, 310
C111, 115,
116,311,
315, 316
C101, 102,
119, 301,
302, 319
C103, 104,
113, 114,
303, 304,
313, 314
DESCRIPTION
Resistors
.25W 100
.25W 10K
.50W 510
.25W 1K
.25W 1.2K
.25W 470
.25W 18K
.25W 22K
.25W 27K
.25W 5.6K
.25W 10K
.25W 160K
.25W 24K
.25W 1M
.25W 681
.25W 1.24K OHMS
.25W 1.82K OHMS
.25W 3.92K
.25W 2.00K
.25W 51.1K
.25W 75K
Capacitors
CER
ELCTLC
ELCTLC
Film
CER DISC 270 pF 100V
Film
Film
Film
ELCTLC 25
CER DISC 0.1
802 EQUALIZER
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS±5%
OHMS
± 1%
± 1%
± 1%
OHMS
± 1%
OHMS
OHMS±1%
OHMS±50/0
DISC
.0047
DISC
.01
470/500
10fJ.F, 25V
.0012
/-IF
0.15
/-IF
.0033
/-IF
.047
/-IF
/-IF
fJ.F
fJ.F
100V
fJ.F
100V ±
100V ±
100V ±
100V ±
25V
/-IF
100V.
± 1%
1.4KV
25V
5%
±
5%
5%
5%
5%
PART
NUMBER
107170-101
107170-103
102942-511
107170-102
107170-122
107170-471
107170-183
107170-223
107170-273
107170-562
107170-103
107170-164
107170-243
102939-105
104095-6810
104095-1241
104095-1821
104095-3921
104095-2001
104095-5112
107170-753
103447
103730
110704
106777
110913-122
106767-271
106510-154
106510-332
106510-473
104560
106881
SYMBOL
Miscellaneous
Chassis
Cover
Line
Line
Strain
T1
T1 Transformer (220V) (PCB #116994)
T1 Transformer (115V)
T1 Transformer (110V) (PCB #112991)
T1 Transformer (110V) (PCB #116994)
S1
S2
Z1
0101-104
01
U101,301
102,302
01
02
Transformer (220V) (PCB #112991) 114998
Power
Slide
Phone
Phone
XLR
Pushbutton
Panel
Semiconductors
Bridge
Diode
Zener
I.C.OPAMP
4559
2N3906
2N3904
DESCRIPTION NUMBER
Cord
115/100V
Cord
220V
Relief
Switch
DPDT 108425-5
Switch
DPDT 110695
Jack
Input
Jack
Output
Connector
Mount
LED
Ass'y
Rectifier
IN4148
Diode
24V 1W
PART
109254
109255
111672
113608
106346
116942
110385
111060
117721
104877
102626
106894
106677-3
111558
110696
11404~
110697
108568
102426
102432
802 LOUDSPEAKER
Column Extender (Short port) 121808
Snap Cap 111556
Grille Retainer (grille still) 121831-01
Coupling Control Insert (Fuzz Buzz) 109446
Grille
Driver Assembly 121777
Gasket, Speaker 111624
Thumbscrew, M8 114849
Literature
Fuse, 3 AG, 4
Fuse
Fuse
Fuse
Capacitor
Lamp
Lamp 24V (1)
Phone
XLR
Fuseholder
Tinnerman
Audio
Frequency
Accessory
Carton
Pinch Clinch (Clinch Nuts)
Latch
Thumbscrew
Kit
amp
(120V)
5 x 20 mm 4 amp (I
Cap (120V)
Cap (Universal)
10
/-l~
10%75 VDC
12V (4)
Jack
1191959
Connector
Body
Clip
Cables
Contouring
Kit
Kit
Clips
nternational)
Assy.
109467-18
109463
104715-400
109494-400
109484
109493
110311
109211
111431
109486
109485
109481
102643
111361
110707
109459
123174
109480
109483
'-........./
'--...-/
Page 5
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NOTES: 0
UNL ESS OTHERWISESPECIFIE
1. RESISTORS IN
CAPACI TORS IN liF . 72 or 4558
2. ALL IC'S ARE LF 353
3 DC VOLTAGES AR E
. THESCHEMATI
4 VOLTAGE CON
. 120 - 240VAC QUALIZER MANUFACTURED
THE BOSE 802 E S NOT
FOR 120VAC
VERTIBLE TO 240VA N
FACTO RY
FACTO RY FOR
240 - 120VAC ER
THE BOSE802
FOR 240VAC
120VAC OPER POWER TRANSFO RMER
WIRING TO TH E
PRIMARY: FORMER LINK LK-2.
a. REMOVE POWER
b. ADD
LK-3 (THE
VOL
c CUT THE EXISTIN TH 120 V TYPE.
. UNIT AND
d. REMOVE240VA
OF UN IT.
P2
"' P"l.&
-
--
l
~
'
3'
0 , 1I4W, 5%
--
II
6
r
i
I 220V l K.2.
I yp.R-I
" ,
I 4
I
L _
~;u~g
VC
ERSION INFORMATION
OPERA6'g~~
MODS'FE
'~~~~
EQRU:T~
~N
O~~O
N
BY CHA NGING THE
POWE
-rAGE
T~~~~
SRpTE~~~R
CONVE~~.?oNJ·
R EPLCA~~'
---
l
B
---l
ON
CHANN
CON-
RAT10N
EXCEPT BY
CONTACT
INSTRUCTIONS
MANUFA
CTURED
IS CONVERTIBLETO
MER
LINK LK-l AND
S
REQUIRE NO
PLU
G
FROM THE
~~ER
FROM REAR
I
I
EL 2 OF
THE
CI
. 0041
IA
K.v
5. TEST PROCEDURE: 0 TO AN EQUALIZER INPUT
OdB is REFERENCE ING A
VOLTAGE OF
WAVE. DO NOT U OVERLOAD
THAN 400mV AS POSSIBLE Y CAN OCCUR.
(DEPENDING ON
MAXIMUM
600 OHM S OR 5. Hz AND 16 kHz.
HIGHER) OCCUR S AT 60TI CS FOR EACH TEST
6. RESPONSE
POINT IS
SWITCH SET LAST GRAPH)
EXCEPT FOR
7 EQUA LIZER GAIN
. POSITION FOR ALL UNITS.
8. EARLY802
HAVE TH E P ITIONS THE
UNDER LOW LINE
OSCI LLATION IS
HIGH - PITCHED WH
C~~~
CHA NGE R3 FROM
9 SHADED COMPO NENTS
. ADDED TO LATER
THESEWEREFOR V
AND INPUT PROTECTION.
200~~~~ST
F~~g~i~g
OUT~UVOL
TS
CH
ARA~:~
SHO'~~d
E
OQ~:~~~~~~F
~~E
TR~
~~
B
GAIN POSITION
F'
RSS~,~~~
COND
G
E~iT~~
I,S2~~~~
E~
3
.3k~
ELS
Mg~A
SIGNALS HIGH ER
INTO 2 KOHM OR
(EQUALIZER GAIN
SET IN OdB GAIN
OSC
LLY DESCRIBED AS A
OR DISTORT ION TO
10~~0
~~
MODIFICATIONS
OF 802 EQUALIZER.
GE
STABILAZATION
650 Hz SINE
E
h5VOLTS INTO
ILLAT
ION
C4
500
2 'SV
OUTP UT A
INVERTIN G 2
INP UT A 3
NON~lNVERT
IN PU T A v- 4
ING
..-.",_,
TOP VI EW
v +
7 OUTPUT 8
6 IN vERTING
IN PUT B
5 NON
-INVERT
INPUT 8
ING
LED
INOICATO
~
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