Kenwood KAC 646 X Owners Manual

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KENWOOD KACB46X
INSTRUCTION MANUAL

KENWOOD CORPORATION
©Bs4-0898-oo (KM) (MC)

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 back 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 the product.

Model KAC-646X Serial number

Safety precautions
_ Cleaning the unit

Take the following precautions to prevent , If the surface is dirty, wipe it dean with a

fire and avoid personal injury : , - -
. When extending the battery cable, or ground Silicon cloth or soft drycloth With the power

. off.
cable, use 3mm2 (AWGlZ) or larger automotive _
grade cable to avoid cable deterioration or ACAUT'ON , _
damage to the covering, Do not use hard cloths or paint thinner, alcohol, or
0 Check that no metal objects (coins, tools, etc.) other volatile solvents. These 733 damage
are left inside the unit to avoid short circuits. external surfaces or remove Indicator characters.

0 If 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 it touched. Accessories
Part name E)\(It_ernal Nuirtnber 0f
Take the following precautions to keep new ems
the unit in proper working order. Self-tapping
0 Be sure the unit is connected to a 12V DC screws 4
power supply with a negative ground (04 X 16mm)

connectlont Terminal cover

Do not open the top or bottom cover, (Power 1

Do not install the unit in places it is exposed to terminal)
direct sunlight, high heat or humidity, water
may splash over it, or dust exists.

NOTE

0 if you have difficulty in installing this unit in
your vehicle, contact your Kenwood dealer,

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Troubleshooting guide_ _ __

Often, what appears to be a malfunction is due to user error. Before calling for service,

please consult the following table.

Symptom

No sound.
(No sound from one side.)

Cause

Input (or output) cables are
disconnected.

Remedy

Connect the input (or output)
cables.

The output level is too
small (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 63/9

polarity.

Connect them properly checking -
the (43/9 of the terminals and
cables well.

A speaker cable is pinched by a
screw in the car body.

Connect the speaker cable again
so that it is not pinched by
anything.

Specifications _

Specifications subject to change without notice.

Audio Section

Max Power Output (4 Q)
4 Channel Mode ...................................................................................................... 50 W X 4
3Channel Mode ..... ....50W><2+ 140 W><1
2 Channel Mode .................................................................................................... 140 W x 2

Rated Power Output (4 Q)
4 Channel Mode ...................................... 25 W x 4 (20 Hz ~ 20 kHz less than 0.08 %THD)
3 Channel Mode .................. 25 W x 2 (1 kHz 0.08 % THD) + 70 W x1 (1 kHz 0. 8 % THD)
2 Channel Mode ...................................................................... 70 W x 2 (1 kHz, 08 % THD)

Rated Power Output (2 (2)

4 Channel Mode ...................................................................... 35 W x 4 (1 kHz, 0 8 % THD)

Frequency Response ................
Signal to Noise Ratio ................

Sensitivity (MAX) .......
Sensitivity (MIN) .....
Input Impedance ..............
Low Pass Filter ....................

..... 10 Hz ~ 45 kHz (+0, -1 dB)

.................. 0.2 V (rated output)

.40 V (rated output)
....................... 10 k9

...................... 80 Hz (12 dB/oct.)

High Pass Filter .............................................................................................. 150 Hz (12 dB/oct.)
General
Operating Voltage ............................................................................ 14. 4 V (11 ~ 16 V allowable)

Current Consumption (1 kHz, 10% THD) ....................................
Dimensions (W x H x D) .................................................................................

...................... 22 A
260x 52 x 209 mm
(10-1/4 x 2-1/16 x 8-1/4 in.)

Weight ..................................................................................................................... 2.5 kg (5.5 lb)