Kenwood Car Amplifier KAC 816 User Manual

KAC-816  
MONO POWER AMPLIFIER  
INSTRUCTION MANUAL  
© PRINTED IN MEXICO B64-1170-00 (EM)  
 
Installation procedure  
1. Remove the ignition key and disconnect the negative - terminal of the battery to prevent  
short circuits.  
2. Set the unit according to the intended usage.  
3. Connect the input and output cables of the units.  
4. Connect the center unit and this unit according to the required application.  
5. Connect the speaker cables and sigma servo feed back cables.  
6. Connect the power cable, power control cable and grounding cable following this order.  
7. Install the unit in the car.  
8. Connect the negative - terminal of the battery.  
9. Turn power ON and ensure that sound is output normally.  
2CAUTION  
• If sound is not output normally, immediately turn power off and check connections. Be sure to  
perform the sigma servo connection correctly.  
• Be sure to make correct connections of the sigma servo terminals.  
• Be sure to turn the power off before changing the setting of any switch.  
• If 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.  
• 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.  
Installation  
Self-tapping screw  
(ø4 × 16 mm)  
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.  
• Use the extension cables. (Optional)  
Length  
0.5m  
1m  
2m  
4m  
5m  
6m  
Type  
RCA cable  
RCA cable (ø7mm)  
RCA cable (ø12mm)  
CA-2SL  
CA-12SL CA-22SL  
CA-52SL  
CA-53WL  
CA-3WL CA-13WL CA-23WL  
CA-5W CA-15W CA-25W  
CA-45W  
CA-65W  
2CAUTION  
• Do not install the unit under the carpet. Otherwise heat build-up occurs and the unit may be  
damaged.  
• Install this unit in a location which allows heat to easily dissipate.  
Once installed, do not place any object on top of the unit.  
• Install the unit securely in a location that does not interfere with driving.  
3
 
Controls  
Operations of the follow ing control and sw itches are required in accordance w ith  
the center unit and speakers connected w ith this unit.  
POWER IN  
FUSE(20A)  
SERVO ΙΙ  
SERVO ΙΙ  
SPEAKER OUTPUT  
BATT  
GND  
20  
P.CON(REMOTE)  
FUSE(20A)  
20  
4
5 6  
1 2 3  
SPEAKER LEVEL INPUT  
15Hz  
LPF  
INPUT  
OFF  
25Hz  
LEFT  
RIGHT  
LINE IN  
FREQUENCY(Hz) SENSITIVITY(V)  
0.5  
R
L
150  
INFRASONIC  
100  
0.3  
1
GND  
70  
2
MONO  
POWER AMPLIFIER  
3
4
50  
200  
5
0.2  
7
8 9 0 !  
@
1 FUS E (2 0 A × 2 )  
2 Ba t t e ry t e rm in a l  
3 Gro u n d t e rm in a l  
4 P o w e r c o n t ro l (REMOTE) t e rm in a l  
5 S p e a k e r o u t p u t t e rm in a ls  
As this unit accepts speakers with a minimum impedance of 2 ohms, connect speakers with  
2-ohm or higher impedance to these terminals.  
2CAUTION  
The rated input of the speakers should be no less than the maximum output of the amplifier.  
Otherwise malfunction may result.  
6 S IGMA S ERVO FEED BACK t e rm in a ls (S e e p .8 )  
2CAUTION  
Be sure to make proper connections to the SIGMA SERVO FEED BACK terminals. Incorrect  
connection may result in lack of sound output or other malfunctions.  
7 INFRAS ONIC FILTER s w it c h  
Ultralow frequencies that cannot be reproduced even by a subwoofer speaker do not become  
sound but become unnecessary oscillations, which affect the sound by causing distortion,  
etc. Setting this switch to "15 Hz" or "25 Hz" cuts the frequencies below the respective  
frequency.  
This improves the reproduction performance of the speakers by eliminating unnecessary  
oscillations which will not become sound.  
8 LOW PAS S FILTER FREQUENCY c o n t ro l  
This control adjusts the frequency band output from this unit.  
10  
9 INP UT S ENS ITIVITY c o n t ro l  
0.5  
Set this control according to the pre-output level of the center unit  
15  
0.3  
1
connected with this unit, or to the maximum power output of the  
genuine-accessory car stereo.  
2
3
Use the diagram on the right as a guide.  
4
0.2  
25  
5
(V)  
(W)  
NOTE  
For the pre-output level or the maximum power output, refer to the  
“Specifications” in the instruction manual of the center unit.  
4
 
0 RCA c a b le g ro u n d le a d t e rm in a l  
! LINE IN t e rm in a l  
@ S p e a k e r le ve l in p u t t e rm in a ls  
Pow er indicator  
P o w e r in d ic a t o r:  
When the power is 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 is any  
indication of trouble.  
Power indicator  
Th e p ro t e c t io n fu n c t io n is a c t iva t e d in t h e fo llo w in g  
s it u a t io n s :  
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.  
• A speaker cable may be short-circuited.  
• A speaker output may be in contact with the ground.  
• The temperature of the internal parts may be higher than 120°C (248°F).  
• The sigma servo connection may be erroneous.  
• The fuse of this unit may be blown.  
• The unit may be malfunctioning and sending DC signal to the speaker output.  
• The grounding cable of this unit may not be connected with a metallic part which is  
electrically connected with the negative terminal of the battery.  
• The power control cable may not be connected to this unit.  
• The grounding cable of the center unit (cassette receiver, CD receiver, etc.) may not be  
connected with a metallic part which is electrically connected with the negative terminal of  
the battery.  
5
 
Connection  
RCA c a b le c o n n e c t io n  
2CAUTION  
Left output (White)  
Right output (Red)  
CENTER UNIT  
(Cassette receiver,  
CD receiver, etc.)  
Do not connect cables and  
leads to both RCA cable input  
jacks and the speaker input  
terminals simultaneously, for  
this may cause malfunction  
or damage.  
RCA cable  
(Commercially  
available part)  
Power control cable  
(Commercially  
available part)  
Right input  
Left input  
SPEAKER LEVEL INPUT  
LEFT RIGHT  
15Hz  
OFF 25Hz  
LPF  
INPUT  
LINE IN  
FREQUENCY(Hz) SENSITIVITY(V)  
0.5  
R
150  
INFRASONIC  
100  
0.3  
1
GND  
70  
2
MONO  
POWER AMPLIFIER  
3
4
50  
200  
5
0.2  
RCA cable ground term inal  
2CAUTION  
When using an RCA cable with  
a ground lead attached, connect  
the ground lead to this terminal.  
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.  
S p e a k e r le ve l in p u t c o n n e c t io n  
Left output  
Genuine-accessory  
car stereo  
ACC  
Right output  
Speaker level input term inals  
Lead terminal  
(Commercially  
available parts)  
+
-
Battey  
Right input  
Left input  
SPAKER LEVL INPUT  
LEFT RIGHT  
15Hz  
LPF  
INPUT  
OFF  
25Hz  
LINE IN  
FREQUENCY(Hz) SENSITIVITY(V)  
0.5  
R
L
150  
INFRASONIC  
100  
0.3  
1
GND  
70  
2
MONO  
POWER AMPLIFIER  
3
4
50  
200  
5
0.2  
2CAUTION  
• The genuine-accessory car stereo shall have a maximum power output of no more than 25 W.  
• Do not connect the speaker output leads from a power amplifier (Optional) to the speaker input  
terminals of this unit, for this may cause malfunction or damage.  
• Do not connect cables and leads to both RCA cable input jacks and the speaker input terminals  
simultaneously, for this may cause malfunction or damage.  
• Connect the power control lead to a power supply which can be turned ON/OFF by the ignition  
key switch (ACC line).  
With this connection, shock noise may be generated when the power of the genuine-accessory  
car stereo is switched ON/OFF.  
6
 
P o w e r a n d S p e a k e rs c a b le c o n n e c t io n  
Subwoofer  
Distribute the speaker cables and  
sigma servo cables along the  
same paths.  
Power control cable  
POWER IN  
FUSE(20A)  
SERVO ΙΙ  
SERVO ΙΙ  
SPEKER OUTPUT  
BATT  
GND  
20  
P.CON(REMOTE)  
FUSE(20A)  
20  
Power control  
(REMOTE) lead  
terminal  
Terminal cover  
Battery cable (Yellow)  
Ground cable (Black)  
• If 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.  
• Do not allow the cord to directly contact the edge of the iron plate by using  
Grommets.  
Round terminal (Large)  
Fire wall  
Grommets  
+
-
Battery  
NOTE  
2WARNING  
• 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.  
• When installing two amplifiers, connect a power tune-up cable to  
each of them while taking care not to exceed the cable capacity.  
• The power cable should be thick enough to supply the required  
current and connected directly from the battery.  
To prevent fire caused by a  
short in the wiring, connect  
a fusible link or breaker  
nearby the battery’s  
positive terminal.  
Pow er term inal  
Speaker output cable term inal  
Pass battery and ground cables through supplied  
terminal cover and connect to respective  
terminals. After completing connections, fasten  
terminal cover over terminal bracket.  
Connect the speaker output  
cables to these terminals.  
Round terminal (Medium)  
Round terminal (Small)  
Lead terminal  
(Commercially  
available part)  
Speaker output  
cable  
7
 
Sigm a servo feed back  
The sound reproduced through conventional amplifiers is distorted due to the  
counterelectromotive force produced in the oscillating system of the speaker. The  
counterelectromotive force is particularly high with the woofer which requires a large  
drive mass.The sigma servo connection reduces distortion caused by the  
counterelectromotive force by including the circuit up to the speaker terminals in the  
negative feedback loop. This makes it possible to drive speakers with more fidelity to  
the input signals and create a sharp bass sound image with few feeling of noise  
interference.  
NOTE  
The speaker cables and sigma servo cables should be distributed along the same paths.  
2CAUTION  
• The extension of the negative feedback loop to include the speaker terminals makes it  
necessary to connect the sigma servo terminals correctly. Incorrect connection may result in  
sound degradation or other malfunction. If sound is not reproduced normally, check the  
connection of the sigma servo terminals, etc.  
• If the Sigma servo terminals are not connected, the sound may fluctuate or noise may occur.  
Be sure to connect the Sigma servo terminals correctly.  
• When connecting speakers in a parallel configuration, use speakers with an impedance of 4  
ohms or more. Connecting speakers with smaller impedance than 4 ohms will cause  
malfunction.  
• The rated input of the speakers connected to this unit should be no less than the maximum  
output of the amplifier. Otherwise malfunction may result.  
Be specially careful in this when connecting speakers in a parallel configuration.  
Ba s ic s ig m a s e rvo c o n n e c t io n  
S e rie s c o n n e c t io n  
2CAUTION  
Make this cable as short as possible.  
P a ra lle l c o n n e c t io n (1 )  
P a ra lle l c o n n e c t io n (2 )  
2CAUTION  
2CAUTION  
The speaker cables connected to this unit  
should be thick enough to supply the current  
capacity of two speakers.  
This connection is possible only when the  
speakers are identical and the speaker cables  
are also of the same type and length.  
S im p lifie d s ig m a s e rvo c o n n e c t io n  
In case any of the connection examples above cannot be  
used or if the speakers cannot be connected to the  
speaker terminals, connect them to this unit as shown in  
the figure.  
8
 
Troubleshooting Guide  
Wh a t m ig h t a p p e a r t o b e a m a lfu n c t io n in yo u r u n it m a y ju s t b e t h e re s u lt  
o f s lig h t m is o p e ra t io n o r m is w irin g . Be fo re c a llin g s e rvic e , firs t c h e c k t h e  
fo llo w in g t a b le fo r p o s s ib le p ro b le m s .  
P ROBLEM  
P OS S IBLE CAUS E  
S OLUTION  
No sound.  
(No sound from one side.)  
• Input (or output) cables are  
disconnected.  
• Connect the input (or output)  
cables.  
• The connection of the sigma  
servo terminals is wrong.  
• Protection circuit may be  
activated.  
• The fuse may be blown  
because the volume was too  
high.  
• Check the connection referring  
to "Sigma servo feed back".  
• Check connections by referring  
to "Power indicator".  
• Replace the fuse with a new  
fuse and use a lower volume.  
The output level is too  
sm all (or too large).  
The input sensitivity adjusting  
control is not set to the correct  
position.  
Adjust the control correctly  
referring to "Controls".  
The sound quality is bad.  
(The sound is distorted.)  
• The speakers cable are  
connected with wrong + / -  
polarity.  
• Connect them properly checking  
the + / - of the terminals and  
cables well.  
• A speaker cable is pinched by a • Connect the speaker cable again  
screw in the car body.  
so that it is not pinched by  
anything.  
• The switches may be set  
improperly.  
• Set switches properly by  
referring to "Controls".  
Specifications  
S p e c ific a t io n s s u b je c t t o c h a n g e w it h o u t n o t ic e .  
Audio Section  
Max Power Output (2 )................................................................................................400 W × 1  
Rated Power Output (4 )  
(4 )....................................................................................200 W × 1 (DIN45324, +B=14.4 V)  
(2 ) ........................................................................................300 W × 1 (100 Hz, 0.8 % THD)  
Frequency Response (+0, –1 dB) ............................................................................5 Hz ~ 200 Hz  
#
Total Harmonic Distortion (Rated power) ............................................................0.01 % (100 Hz)  
Sensitivity (MAX) (rated output)..............................................................................................0.2 V  
Sensitivity (MIN) (rated output) ..............................................................................................5.0 V  
Signal to Noise Ratio............................................................................................................100 dB  
Input Impedance....................................................................................................................10 kΩ  
Damping Factor..............................................................................More than 9900 (at connect)  
Low Pass Filter Frequency (24 dB/oct.) ......................................................50 ~ 200 Hz (variable)  
Infrasonic Filter Frequency (24 dB/oct.)..........................................................................15 / 25 Hz  
# Sensitivity = Mini. , Through LPF (30 kHz)  
General  
Operating Voltage ..............................................................................14.4 V (11 ~ 16 V allowable)  
Current Consumption (4 , 14.4 V, 10% THD)........................................................................28 A  
Dimensions (W × H × D) ................................................................................290 × 52 × 250 mm  
Weight ..................................................................................................................................3.1 kg  
9
 

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