Kenwood KAC-746 instruction manual System examples

Page 8

System examples

■Full-range 4-channel + Subwoofer system

Switch setting

CENTER UNIT

L

R

L

R

L

A

B

L

R L R

 

100 80

100

 

 

 

 

 

150

FILTER

OPERATION

 

80

 

 

 

150

OFF

 

 

 

 

HPF

LPF

 

 

 

50 LPF 200

 

 

 

 

 

50 HPF

200

 

 

 

 

 

FREQUENCY(Hz)

 

 

STEREO MONO(Lch)

 

 

 

 

 

 

L+R

 

 

 

 

CONTROL

A

A B

A

 

 

 

 

100 80 150 100

 

OPERATION

FILTER

80

INPUT SELECTOR

 

 

OFF

 

 

 

 

 

150

 

 

 

 

HPF

LPF

 

A+B

RLINE OUT

Amplifier

■High-power 2-channel system

 

 

 

 

 

 

 

50 LPF 200

 

 

 

 

 

 

 

50 HPF 200

STEREO

MONO(Lch)

 

 

FREQUENCY(Hz)

 

L+R

 

 

 

CONTROL B

Switch setting

CENTER UNIT

L

R

L

R

L

A

B

L

R L R

(Bridged)

(Bridged)

 

100 80

100

 

 

 

 

 

150

FILTER

OPERATION

 

80

 

 

 

150

OFF

 

 

 

 

HPF

LPF

 

 

 

50 LPF 200

 

 

 

 

 

50 HPF

200

 

 

 

 

 

FREQUENCY(Hz)

 

 

STEREO MONO(Lch)

 

 

 

 

 

 

L+R

 

 

 

 

CONTROL

A

A B

A

 

 

 

 

100 80 150 100

 

OPERATION

FILTER

80

INPUT SELECTOR

 

 

OFF

 

 

 

 

 

150

 

 

 

 

HPF

LPF

 

A+B

RLINE OUT

■High-pass (80 Hz) + Subwoofer(80 Hz) system

 

 

 

 

 

 

 

50 LPF 200

 

 

 

 

 

 

 

50 HPF 200

STEREO

MONO(Lch)

 

 

FREQUENCY(Hz)

 

L+R

 

 

 

CONTROL B

Switch setting

 

L

 

 

CENTER UNIT

 

 

A

R

 

 

 

L

(High pass)

R

 

100 80

100

 

 

 

 

 

 

 

 

 

 

150

 

FILTER

 

OPERATION

80

 

 

 

 

150 OFF

 

 

 

 

 

 

 

HPF LPF

 

 

 

 

 

 

50 LPF 200

 

 

 

 

 

 

 

 

 

 

50 HPF

200

 

 

 

 

 

 

 

 

 

 

L

R

L

B

L

Subwoofer

R

(L + R)

 

 

(Bridged)

 

FREQUENCY(Hz)

STEREO MONO(Lch)

 

 

 

L+R

 

 

CONTROL

A

A B

A

 

100 80 150 100

 

OPERATION

FILTER

80

INPUT SELECTOR

OFF

 

 

 

150

 

 

HPF LPF

 

A+B

R LINE OUT

 

 

 

 

 

 

 

50 LPF 200

 

 

 

 

 

 

 

50 HPF 200

STEREO

MONO(Lch)

 

 

FREQUENCY(Hz)

 

L+R

 

 

 

CONTROL B

■Tri-mode

CENTER UNIT

L

R

L

R

L

A

B

L

R

L

R

C L

C

C

L

Switch setting

 

100 80

100

 

 

 

 

 

150

FILTER

OPERATION

 

80

 

 

 

150

OFF

 

 

 

 

HPF

LPF

 

 

 

50 LPF 200

 

 

 

 

 

50 HPF

200

 

 

 

 

 

FREQUENCY(Hz)

 

 

STEREO MONO(Lch)

 

 

 

 

 

 

L+R

 

 

 

 

CONTROL

A

A B

A

 

 

 

 

100 80 150 100

 

OPERATION

FILTER

80

INPUT SELECTOR

 

 

OFF

 

 

 

 

 

150

 

 

 

 

HPF

LPF

 

A+B

RLINE OUT

C

 

 

 

 

 

50 LPF 200

 

 

 

 

 

50 HPF 200

STEREO

MONO(Lch)

 

 

FREQUENCY(Hz)

L+R

 

 

 

CONTROL B

●Principle of Tri-mode

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

Crossover Frequency

Coil (L): Passes low frequencies and blocks high

 

frequencies. (Low pass)

0 dB

 

 

 

Capacitor (C): Passes high frequencies and blocks low

-3 dB

 

 

 

 

frequencies. (High pass)

L

C

C=

159000

(µF)

fc=Cut of Frequency (Hz)

 

 

fc x R

 

Frequency

L=

159 x R

(mH)

R=Speaker Impedance (Ω )

 

 

●Example:

 

 

fc

 

 

 

 

 

 

 

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).

2CAUTION

 

 

 

 

 

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.

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Contents KAC-746 Part name External Number View Items Safety precautionsAccessories 2CAUTION Installation procedureInstallation Controls Filter switchOperation switch @ RCA cable ground lead terminal # Input Selector switch Protection functionInput Sensitivity control Protection function activates in the following situationsConnection RCA cable connectionSpeaker level input connection Center UnitPower and Speakers cable connection Power terminalBridged 2WARNINGSystem examples Troubleshooting guide SpecificationsSpecifications subject to change without notice Audio Section

KAC-746 specifications

The Kenwood KAC-746 is a powerful and versatile 4-channel car amplifier designed for those who are serious about enhancing their in-car audio experience. With its sleek design and robust performance, this amplifier is an ideal choice for car audio enthusiasts looking to elevate their sound system.

One of the standout features of the Kenwood KAC-746 is its impressive power output. It boasts a maximum power rating of 760 watts, delivering an RMS power of 70 watts per channel at 4 ohms. This ensures that your speakers receive enough power to produce clear and dynamic sound, making your favorite music come alive.

The KAC-746 incorporates advanced technologies for enhanced audio performance. It utilizes a Class AB amplifier architecture, which provides great efficiency while delivering high-quality sound. This class of amplification is known for its ability to produce low distortion levels, ensuring that audio remains faithful to the original recording. This results in a well-balanced audio output with robust bass and crisp highs.

Another significant characteristic of the Kenwood KAC-746 is its extensive compatibility with various audio systems. It features both low-level (RCA) and high-level (speaker wire) inputs, making it easy to connect to any car audio system, regardless of whether it has a built-in amplifier or not. Additionally, the speaker-level inputs allow for seamless integration with factory radio systems, making it an excellent upgrade choice for any vehicle.

The amplifier also features built-in high-pass and low-pass filters, allowing users to customize the audio output to suit their preferences. These filters can enhance sound quality by minimizing distortion caused by unwanted frequencies. This level of customization ensures that the KAC-746 can produce the kind of audio that users desire, whether they prefer booming bass or crystal-clear treble.

Durability is another aspect where the KAC-746 shines. It's designed with a heavy-duty aluminum chassis, which not only contributes to its sleek appearance but also aids in heat dissipation, ensuring reliability even under heavy use.

In conclusion, the Kenwood KAC-746 is an exceptional choice for car audio enthusiasts looking to upgrade their sound system. With its powerful output, advanced Class AB amplification, extensive compatibility, customizable filters, and durable design, it delivers performance that can satisfy even the most demanding audio preferences.
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