Kenwood KAC-626 User manual

<ENWOOD
POWER AMPLIFIER
KAC-626
KAG-606
INSTRUCTION MANUAL
KENWOOD CORPORATION
© B64-0775-00 (K) (MC)
Take the time to read through this instruction manual.
-amiliarity with installation and operation procedures will help you obtain the best
derformance from your new power amplifier.
-or your records
2ecord the seria! number, found on the back of the unit, in the spaces designated on the warranty card,
ind in the space provided below. Refer to the model and serial numbers whenever you call upon your
<ENWOOD dealer for information or service on the product.
Viodel KAC-626/606 Serial number
AWARNING
Take the following precautions to prevent
ire and avoid personal injury :
» When extending the battery cable, or ground
cable, use 3mm (AWG12) or larger automotive
grade cable to avoid cable deterioration or
damage to the covering.
» Check that no metal objects (coins, tools, etc.)
are jeft inside the unit to avoid short circuits.
» Jf you smell or see smoke, turn the power off
immediately and consult your Kenwood dealer.
> Do not touch the unit during use because the
surface of the unit becomes hot and may
cause burns if touched.
ACAUTION |
Take the following precautions to keep
‘he unit in proper working order.
» Be sure the unit is connected to a 12V DC
power supply with a negative ground
connection.
Do not open the top or bottom cover.
Do not install the unit in places it is exposed to
direct sunlight, high heat or humidity, water
may splash over it, or dust exists.
—woTE]
If you have difficulty in installing this unit in
your vehicle, contact your Kenwood dealer.
Cleaning the unit
e® lf the surface ts dirty, wipe it clean with a
silicon cloth or soft dry cloth with the power
off,
ACAUTION
Do not use hard cloths or paint thinner, alcohol, or
other volatile solvents. These may damage
external surfaces or remove indicator characters.
FCC WARNING
e This equipment may generate or use radio
frequency energy. Changes or modifications to
this equipment may cause harmful interference
unless the modifications are expressly
approved in the instruction manual. The user
could lose the authority to operate this
equipment if an unauthorized change or
modification is made.
External | Number of
View Items '
Core
|
re
Self-tapping
screws
(94 x 16mm)
Terminal cover
(Power
terminal)

Operations
of
the
following
control
and
switches
are
required
in
accordance
with
the
center
unit
and
speakers
connected
with
this
unit.
@
RCA
CABLE
GROUND
LEAD
terminal
@ FILTER switch
These
switches
allow
filtering
of
the
speaker
output
signals.
e
HPF
(High
Pass
Filter)
position
(KAC-626
only)
"Only
frequencies
of
150
Hz
or
higher
are
output.
(Frequencies
below
150
Hz
are
cut.)
e
LPF
(Low
Pass
Filter)
position
Only
frequencies
of
80
Hz
or
lower
are
output.
(Frequencies
above
80
Hz
are
cut.)
e
OFF
position
The
original
sound
without
filtering
is
output.
@) OPERATION switch
This
switch
allows
to
select
the
amplification
method
of
input
signals.
e STEREO position
The
input
left
and
right
signals
are
amplified
separately.
Use
this
position
when
the
unit
is
as
a
stereo amplifier.
e L+R position (KAC-626 only)
The
input
left
and
right
signals
are
combined
before
being
amplified.
Use
this
position
when
the
unit
is
used
for
subwoofer
speakers
or
the
L+R
(monaural)
sound
is
required.
e
MONO
(Lch)
position
;
Amplifies
the
signal
input
from
the
left
side
only.
Set
to
this
position
and
make
bridged
connections
to
use
as
a
high-power
monaural
amplifier.
(The
input
right
signal
is
not
output.)
@ INPUT SENSITIVITY control
Maximum
power
Center
unit
|
Amplifier
input
output of genuine- exes
accessory car stereo.) Preout level sensitivity
Set
this
controi
according
to.the
pre-output
level
300
mV
MAX
(0.15
V)
(OW
[800-1000
mv
of the center unit connected with this unit, or to
the maximum power output of the genuine-
1.0 V~MIN
accessory Car stereo.
For the pre-output level or the maximum power
output, refer to the “Specifications” in the
instruction manual of the center unit.
6) LINE IN terminal
© SPEAKER LEVEL INPUT terminal
» 2 English

@ FUSE (25 A)
BATTERY terminal
(9) GROUND terminal
@ POWER CONTROL (REMOTE) LEAD terminal
d) SPEAKER OUTPUT terminals
KENWOOD
POWER AMPLIFIER
POWER INDICATOR ;
When the power 's turned on, the Power indicator lights.
If the Power indicator does not light when the power is turned on, the protection function may be
activated.
Check whether there ts any indication of trouble.
This unit is equipped with a protection function for protecting this unit and your speakers from various
accidents or problems that can occur.
When the protection function Is triggered, the Power indicator goes off and the amplifier stops operating.
The protection function activates in the following situations:
When a speaker output contacts ground.
When the unit malfunctions and a DC signal is sent to the speaker output.
When the temperature of internal parts exceeds 120°C (248°F).
When a ground cable of the center unit (cassette receiver, CD receiver, etc.) or this unit is not
connected to a metal part serving as an electrical ground passing electricity to the battery's negative ©
terminal.
Power indicator
Frnoalich 2

Installation
procedure
.
Remove
the
ignition
key
and
disconnect
the
negative
©
terminal
of
the
battery
to
prevent
short
circuits.
|
2. Connect the input and output cables of the units.
‘8. Connect the speaker cables.
4. Connect the ground cable and battery cable in the order listed.
5
6
. Install the unit in the car.
. Connect the negative © terminal of the battery.
e
|f
the
fuse
blows,
check
cables
for
shorts,
then
replace
the
fuse
with
one
of
the
same
rating.
Check
that
no
unconnected
cables
or
connectors
are
touching
the
car
body.
Do
not
remove
caps
from
unconnected
cables
or
connectors
to
prevent
short
circuits.
e
Connect
the
speaker
cables
to
appropriate
speaker
connectors
separately.
Sharing
the
negative
cable
of
the
speaker
or
grounding
speaker
cables
to
the
metal
body
of
the
car
can
cause
this
unit
to
fail.
®
After
installation,
check
that
the
brake
lamps,
winkers,
and
wipers
work
properly.
Do
not
install
the
unit
under
the
carpet.
Otherwise
heat
build-up
occurs
and
the
unit
may
be
damaged.
ie
|
“
Self-tapping
screw
_
(84x
16mm)
Pe ate:
Installation board, etc.
(thickness : 15 mm or more)
*
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
hindrances.
As
generally
accepted
positions
for
its
installation,
places
such
as
inside
the
trunk,
etc.
can
be
considered.
e
install
this
unit
in
a
location
which
allows
heat
to
easily
dissipate.
Once
installed,
do
not place
any
object
on
top
of
the
unit.
e
After
installing
the
unit,
check
to
make
sure
that
electrical
equipment
such
as
the
brake
lamps,
turn
signal
lamps
and
windshield
wipers
operate
normally.
e install the unit securely in a location that does not interfere with driving.
4 English
§
~~

With the KAC-626/606, a subwoofer can be added easily to the speaker system by marking use of the
properties of coils and capacitors. This mode of operation ts called Tri-mode.
Principle of Tri-mode
@ Method of frequency band division using a coil and capacitor
seein case of 6dB/oct. slope
L
Output
Crossover
Frequency
"ns
CX;
3
>
g
Cc
Frequency
5
-3
dB
Output
a
‘
i=>
i
k:
Frequency
Frequency
e Coil {(L): Passes tow frequencies and blocks high frequencies. (Low pass)
e Capacitor (C): Passes high frequencies and blocks low frequencies. (High pass)
@ Your coil and capacitor
Use
the
following
formula
to
identify
the
coil
and
capacitor
you
need
in
your
system.
159000 159xR
C= aH. (uF) = ae ae (mH)
fc=Cut of Frequency (Hz) R=Speaker {mpedance (Q)
Example: When it is required to set a crossover frequency of 120 Hz using speakers with an
impedance of 4 ohms.
Prepare commercially-available coil and capacitor with the closest ratings to the results calculated
from the formula above. The capacitor rating should be as close as possible to 331.25 (uF) and the
coil rating shouid be as close as possible to 5.3 (mH).
mSystem example
To use the Tri-mode configuration, set the OPERATION switch to the STEREO position.
R
Fuli-range
speakers
L (Low cut)
Subwoofer
(Monaural)
ACAUTION
lf you wish to bridge-connect a speaker, such as a subwoofer, as shown above, the speaker
impedance must be no !ess than 4 ohms.
Connecting a speaker with an impedance !ower than 4 ohms may damage the unit.
Frnolich 5

|
a
_@System connection
RCA cable ground lead
terminal
When using an RCA cable
with a ground lead attached,
connect the ground lead to
this terminal.
ACAUTION
Do not connect cables and leads to both RCA cable input jacks and
the speaker input terminals simultaneously, for this may cause
maifunction or damage.
Left output (White) CENTER UNIT
(Casstte receiver,
Graphic equalizer etc.)
Power control jead
{Commercially
available part)
ACAUTION
Do not use this terminal for
power source grounding.
This unit will be damaged if
the power source
grounding wire is
connected to this terminal.
Battery terminal
Ground terminal
Power contro! terminal speaker
Left
speaker
Terminal cover
Power terminal
Pass battery and ground cables: through
supplied terminal cover and connect to
respective terminals. After completing
connections, fasten terminal cover over
terminal bracket.
Speaker output terminal
Connect the speaker output cables to
these terminals.
Speaker terminal
polarity
Lead terminal
(Commercially available part)
Terminal cover
Lead terminal
Power control (Commercially available
part)
Speaker output cable
Ground
cable
P :
lf a buzzing noise is heard from the speakers when the
engine is running, connect a line noise filter (optional) to
each of the battery cable.
= KS)
a iS hs
To prevent fire caused by a short in the wiring, connect a fusible link or Battery
breaker nearby the battery's positive terminal.
Connect the ground cable to a metal part of the car chassis that acts as an electrical .
ground passing electricity to the battery's negative © terminal. Do not turn the power on if
the ground cable is not connected.
6 English