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STEREO POWER AMPLIFIER
KAC-821
INSTRUCTION MANUAL
KENWOOD
I
Take the time to read through this instruction manual. Familiarity with installation and
operation procedures will help you obtain the best performance from your new power
amplifier.
For your records
Record the serial number found on the bottom of the unit in the spaces designated on the
warranty card and in the space provided below. Refer to the model and serial numbers
whenever you call upon your KENWOOD dealer for information or service on this product.
Model KAC-821 Serial number———
---------------—--------------------------------------------------------
CPRINTED in JAPAN B50-7910-10(E)(T)
"92/12 11 10 98765432
—
ACCESSORY
No.
©
Tapping screws (^5x50)
Part name
External View
7uT'D>
Number of
units
4
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muuoLiidnyuiiivu uuiuc
What often appears to be a malfunction is often due to user error in operation or connection.
When trouble occurs with your unit, piease check the following before calling for service.
Symptom Cause
The sound level is low.
(No sound from one
side.)
The sound quality is
bad. (The sound is dis
torted.)
A spe ak er cord has bec om e unc on
nec te d.
1. T he sp e ak er s a re c on ne ct ed to
the sa m e wir es ,
2. A s pe ak er co rd is p inc he d by a
scr ew in th e ca r b o dy .'
Che ck the spea ke r cor d co n
nec tio ns .
1. Conn ec t e ac h sp ea k er te rm ina l
to it s res pe c tiv e s pe a ke r o ut pu t.
2. Ch e ck th e sp ea ke r w ir in g.
Remedy
SPECIFICATIONS
Specifications subject to change without notice.
Audio section
Max Power Output (1 kHz, 4 fi}
Normal .................................................................................................................140 W + 140 W
Bridged.................................................................................................................................. 280 W
Power Output
Normal (20 Hz~20 kHz, 4 fi, less than 0.5% THD)
■Bridged (1 kHz, 4 Q, 0.5% THD)
...........................^........................................................
Output Power
Normal (1 kHz, 2 fi, 0,5% THD)
............................................................................
Frequency Response (-3 dB)...................................................................................2 Hz~100 kHz
Sensitivity [rated output) MAX.......................................'.........................................................0.1 V
MIN
......................................... ........................................................
Signal to Noise Ratio...................................................................................................................... 105 dB
Input Impedance................................................................................................................................ 10 kii
Damping Factor (100 Hz)
.........................................................................................
Sub Woofer Frequency.................................................................................30—150 Hz (variable)
............................................
More than 200
75 W + 75 W
150 W
75 W + 75 W
5.0 V
General
Operating Voltage
Current Consumption (MAX.)....................................................................................................20 A
Dimensions (WxHxD)........................................................................................230x50x300 mm
Weight...........................................................................................................................3,5 kg (8.8 lb)
...........................................................................14.4 V (11 — 16 V allowable}
(9-1/16X 1-15/16X 11-13/16 in.)
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IlSSTALLATiON
ш
1. Installation
'■J..' Tapping screws ((p5x 50)
•When installing to the
car, install the unit se
curely for safety driving.
►Use screws supplied as
accessories when install
ing the unit.
► Install the unit in a well-
ventilated place and do
not place the (heavy) ob
ject on it.
Since the power amplifier has no parts which require operation, it can be installed at a
position away from the driver's seat without any hinderances.
As generally accepted positions for its installation, places such as inside the trunk, etc.
can be considered.
Use the extension cables. CA-8L (0.5 m), CA-18L П m), CA-28L (2 m), CA-48L (4 m),
and CA-68L (6 m) (optional) when the connected models are to be installed away from
the power amplifier.
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USE OF THE OPERATION PANEL ACCORDING TO SYSTEM TYPE
Input sensitivity control
The input sensitivity control adjusts the input
sensitivity within a range of 0.1 V to 5.0 V con
tinuously, enabling expansion with various sys
tems. This unit has been set for 0.3V.
KENWOOD head unit
preout level (MAX.)
300 mV
1 V 0.3-0.5 V
( SU0 WOOFER
, FReouersFCY
о OFF ONQ
—-'CM
Amplifier input
sensitivity
0.1 V
• Sub woofer system
By setting the switch on the right to ON, you can
set the output of this unit for sub woofer output
(monaural output). The control on the left can be
used to adjust the sub woofer cut-off frequency.
• Mode switch
Set this switch according to the impedance
of the speakers or the output method, as
shown below.
! When 4-ohnn
I speakers are
’ connected
When 2-ohm
speakers are
connected
When using a
bridged out
put (see
below)
-J
This unit is provided with a bridged output function which enables you
to double the unit's power output. Since the output becomes monaural
when the bridged output function is used, systems can be configured
such as those shown below, (for 4 Q speakers)
• When using a KENWOOD DIN output system:
Left speaker
Right speaker
• When using an RCA pin-plug cord output system:
Power control power supply
Left speaker
Right speaker
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m INSTALL MANNER
1. I'louillaL'OM ami miring, remove
iho i -' :e[ni;n,'i,' of M'o Ijattery to pre-
voni sti'an cimuilaiCj.
2. Con,'0;;r;i ;[i,; |[i[)lj! Of.H output COrds
of ;fio oyotm-i.
3. Connor:: :tio g-ou-o; io the metal
cho';:-;ir, Oii ihy I'.nr.
4. C;jnr:r;ci the i)(jvver enitiply lead.
b. ImbnII ti-i am:l afie; confirming the
instalioliroi and wor-o-ie are correct,
conrinoi too i ; tonninal of the
batimv
^ f L'' A'
0‘‘-■?
,//3
i; ■: ! I'O; IS ijimm-o fim: check that the
asS'im'aioc! Vvima mc: not shortmi r:..aicoi rlooi i oiilaoo ::'iG fuse with a
novv urc.; iia\.ing tt-!: .;erne capacity.
Details of DIN ■
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A WA RN I N G
TO PREVENT ELECTRIC SHOCK,
FIRE AND OTHER INJURY.
PLEASE NOTE THE FOLLOWINGS;
• I o :[\ do not anything
on :.ii llie unit.
• Ih.' M'li cjuch 3S front
|V!| || ;I. C:0 . :| Ijl :( if i'l ■ ■ 1 IveT,
Do not drop pieces of metai, needles,
coins and otfier electrically conductive
matertais into the unit.
Do not place the unit, where it will be ex
posed to direct sunlight or close to heat
ing device.
Do not dash water on tne unit.
Do not place the unit in areas of exces
sive dust, high humidity or on unstable
surfaces.
CLEANING
1. Turn the power off, before cleaning the
unit.
2. Do not use any type of abrasive pad, thin
ner, benzine and any such kind of
objects.
3. Wipe the front panel and other exterior
surfaces of the unit with a soft dry cloth
or a soft cloth lightly moistened with a
neutral detergent.
If an abnormal smeli or smoke is detect
ed, immediately turn the power off.
If you have difficulty in installing the set
in your car, please contact your
KENWOOD dealer.
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