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System examples

●

Principle of Tri-mode

Method of frequency band division using a coil and capacitor•••in case of 6dB/oct. slope

0 dB

-3 dB

Coil (L):

Passes low frequencies and blocks high

frequencies. (Low pass)

Capacitor (C):

Passes high frequencies and blocks low

frequencies. (High pass)

Crossover Frequency

Frequency

159000

C= (µF)

fc x R

159 x R

L= (mH)

fc=Cut of Frequency (Hz)
R=Speaker Impedance (

Ω

)

●

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
(µF) and the coil rating should be as close as possible to 5.3 (mH).

• If you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms.

Connecting a speaker with an impedance lower than 4 ohms may damage the unit.

• Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to

do so will result in a drop of the combined impedance with the subwoofer.

• Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are

sufficient.

CAUTION

MONO(Lch)

STEREO

OPERATION

MONO(Lch)

STEREO

L+R

OPERATION

KAC-728/528

KAC-628

LPF

FILTER

OFF

LPF

FILTER

HPF

OFF

MONO(Lch)

STEREO

OPERATION

MONO(Lch)

STEREO

L+R

OPERATION

KAC-728/528

KAC-628

LPF

FILTER

OFF

LPF

FILTER

HPF

OFF

MONO(Lch)

STEREO

OPERATION

MONO(Lch)

STEREO

L+R

OPERATION

KAC-728/528

KAC-628

LPF

FILTER

OFF

LPF

FILTER

HPF

OFF

MONO(Lch)

STEREO

OPERATION

MONO(Lch)

STEREO

L+R

OPERATION

KAC-728/528

KAC-628

LPF

FILTER

OFF

LPF

FILTER

HPF

OFF

CENTER UNIT

High
pass

Subwoofer
(L + R)
(Bridged)

■

Full-range 2-channel system

■

Full-range 2-c Subwoofer system

■

Tri-mode

■

High-power full-range 2-channel system

Switch setting

Right speaker

Left speaker

Right speaker (Bridged)

Left speaker (Bridged)

Right speaker

Left speaker

Subwoofer
(L + R)
(Bridged)

Содержание KAC-628

Страница 1: ...KAC 728 KAC 628 KAC 528 POWER AMPLIFIER INSTRUCTION MANUAL B64 1360 00 EM ...

Страница 2: ...light 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 If you experience problems during installation consult your Kenwood...

Страница 3: ...ctrical ground passing electricity to the battery s negative terminal Power indicator 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 ...

Страница 4: ...T FUSE 25A POWER IN BATT P CON REMOTE GND LEFT BRIDGED RIGHT SPEAKER OUTPUT POWER AMPLIFIER 25 LPF FILTER HPF MONO Lch STEREO OFF L R OPERATION GND INPUT SENSITIVITY V MAX MIN 0 3 0 5 1 0 L R LINE IN LEFT RIGHT SPEAKER LEVEL INPUT LPF FILTER OFF MONO Lch STEREO OPERATION GND INPUT SENSITIVITY V MAX MIN 0 3 0 5 1 0 L R LINE IN LEFT RIGHT SPEAKER LEVEL INPUT FUSE 20A x 2 POWER IN BATT P CON REMOTE G...

Страница 5: ...e maximum power output of the genuine accessory car stereo Use the diagram on the right as a guide For the pre output level or the maximum power output refer to the Specifications in the instruction manual of the center unit 5 LINE IN terminal 6 Speaker level input terminals 7 Fuse 20 A 2 KAC 728 Fuse 25 A 1 KAC 628 Fuse 15 A 1 KAC 528 8 Battery terminal 9 Ground terminal 0 Power control REMOTE te...

Страница 6: ...Right output Red Left input Right input 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 Connect the power control lead to a power supply which can be turned ON OFF by the ignition key switch ACC line Wit...

Страница 7: ...ers having input power ratings that are less than the output power of the amplifier will cause smoke to be emitted as well as damage The impedance of the speakers that are going to be connected should be 2Ω or greater for stereo connections or 4Ω or greater for bridged connections When more than one set of speakers are going to be used calculate the combined impedance of the speakers and then conn...

Страница 8: ... iron plate by using Grommets 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 Be sure to attach a protective fuse into the battery cable close to the battery Use a protective fuse having a capacity that is about 10 A higher than the maxi...

Страница 9: ...as a gasoline tank brake pipe or wiring harness and be careful not to cause scratches or other damage Do not install near the dashboard rear tray or air bag safety parts The installation to the vehicle should securely fasten the unit to a place in which it will not obstruct driving If the unit comes off due to a shock and hits a person or safety part it may cause injury or an accident After instal...

Страница 10: ... connect capacitors to speakers to which high frequencies will be passed Failure to do so will result in a drop of the combined impedance with the subwoofer Ensure that the withstand voltage and current ratings of the capacitors C and coils L are sufficient 2CAUTION L R L R L R L R L R L R L R L R L R L R L R L C C MONO Lch STEREO OPERATION MONO Lch STEREO L R OPERATION KAC 728 528 KAC 628 LPF FIL...

Страница 11: ...e may be blown because the volume was too high The input sensitivity adjusting control is not set to the correct position The speakers cable are connected with wrong polarity A speaker cable is pinched by a screw in the car body The switches may be set improperly Connect the input or output cables Check connections by referring to Protection function Replace the fuse with a new fuse and use a lowe...

Страница 12: ...W 2 75 W 2 50 W 2 Frequency Response 0 1 dB 5 Hz 50 kHz 10 Hz 45 kHz 5 Hz 50 kHz Signal to Noise Ratio 100 dB 100 dB 100 dB Sensitivity MAX rated output 0 2 V 0 15 V 0 2 V Sensitivity MIN rated output 5 0 V 4 0 V 5 0 V Input Impedance 10 kΩ 10 kΩ 10 kΩ Low Pass Filter 12 dB oct 80 Hz 80 Hz 80 Hz High Pass Filter 12 dB oct 150 Hz General KAC 728 KAC 628 KAC 528 Operating Voltage 11 16 V allowable 1...

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