KAC-728
KAC-628
KAC-528
POWER AMPLIFIER
INSTRUCTION MANUAL
B64-1360-00 (EM)
Safety precautions
2WARNING
To prevent injury and/or fire, take the following precautions:
•When extending the battery or ground cables, make sure to use automotive-grade cables or other cables with an area of 5 mm2 (AWG10) or more to prevent cable deterioration and damage to the cable coating.
•To prevent short circuits, never put or leave any metallic objects (e.g., coins or metal tools) inside the unit.
•If the unit starts to emit smoke or strange smells, turn off the power 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.
2CAUTION
To prevent damage to the machine, take the following precautions:
•Be sure the unit is connected to a 12V DC power supply with a negative ground connection.
•Do not open the top or bottom covers of the unit.
•Do not install the unit in a spot exposed to direct sunlight or excessive heat or humidity. Also avoid places with too much dust or the possibility of water splashing.
•When replacing a fuse, only use a new one with the prescribed rating. Using a fuse with the wrong rating may cause your unit to malfunction.
•To prevent short circuits when replacing a fuse, first disconnect the wiring harness.
NOTE
•If you experience problems during installation, consult your Kenwood dealer.
•If the unit does not seem to be working right, consult your Kenwood dealer.
Cleaning the unit
If the front panel gets dirty, turn off the power and wipe the panel with a dry silicon cloth or soft cloth.
2CAUTION
Do not wipe the panel with a hard cloth or a cloth dampened by volatile solvents such as paint thinner and alcohol. They can scratch the surface of the panel and/or cause the indicator letters to peel off.
Accessories
Part name |
External |
Number of |
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View |
Items |
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Round terminal |
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1 |
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(Large) |
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Round terminal |
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2 |
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(Medium) |
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Round terminal |
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1 |
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(Small) |
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Terminal cover |
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1 |
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(Power terminal) |
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Self-tapping screws |
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4 |
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(ø4 × 16 mm) |
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2
Protection function
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.
■Power indicator:
When the power is turned on, the Power indicator lights.
If the Power indicator does not light when the power is turned on, the |
Power indicator |
protection function may be activated. Check whether there is any |
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indication of trouble. |
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■ The protection function activates in the following situations:
• When a speaker cable may be short-circuited.
• 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.
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 speaker cables.
5.Connect the power cable, power control cable and grounding cable following this order.
6.Install the unit in the car.
7.Connect the negative - terminal of the battery.
2CAUTION
•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.
3
Controls
Operations of the following control and switches are required in accordance with the center unit and speakers connected with this unit.
FILTER |
OPERATION |
|
OFF LPF |
STEREO MONO(Lch) |
LINE IN |
KAC-728 |
1.0 |
L |
R |
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0.5 0.3 |
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GND |
MIN MAX |
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INPUT |
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SENSITIVITY(V) |
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1 |
2 |
3 4 |
5 |
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SPEAKER LEVEL INPUT
LEFT |
RIGHT |
6
FILTER |
OPERATION |
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|
OFF |
L+R |
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LINE IN |
HPF LPF |
STEREO MONO(Lch) |
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0.5 0.3 |
L |
R |
KAC-628 |
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GND |
MIN MAX |
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1.0 |
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INPUT |
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SENSITIVITY(V) |
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1 |
2 |
3 4 |
5 |
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FILTER |
OPERATION |
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OFF LPF |
STEREO MONO(Lch) |
LINE IN |
KAC-528 |
0.5 0.3 |
L R |
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1.0 |
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GND |
MIN MAX |
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INPUT |
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SENSITIVITY(V) |
|
1 |
2 |
3 4 |
5 |
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SPEAKER LEVEL INPUT
LEFT |
RIGHT |
6
SPEAKER LEVEL INPUT
LEFT |
RIGHT |
6
KAC-728
POWER IN
FUSE(20A x 2) |
GND |
|
BRIDGED |
|
BATT |
P.CON(REMOTE) |
LEFT |
RIGHT |
|
SPEAKER OUTPUT |
20 |
20 |
POWER AMPLIFIER
7 8 9 0 |
! |
KAC-628
POWER IN
|
|
GND |
BRIDGED |
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|
FUSE(25A) |
BATT |
P.CON(REMOTE) |
LEFT |
RIGHT |
SPEAKER OUTPUT |
25 |
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POWER AMPLIFIER
7 8 9 0 |
! |
POWER IN |
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GND |
BRIDGED |
FUSE(15A) BATT P.CON(REMOTE) |
LEFT RIGHT SPEAKER OUTPUT |
KAC-528 |
|
15 |
|
POWER AMPLIFIER
7 8 9 0 |
! |
4
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