Kenwood KAC-9405 User Manual

8Ω

2Ω

4Ω

8Ω

4Ω

4Ω 4Ω

4Ω

4Ω4Ω4Ω

280 mm 240 mm

259 mm

ø 4.6

238 mm

213 mm

Safety precautions

8Ω

2Ω

4Ω

8Ω

4Ω

4Ω 4Ω

4Ω

4Ω4Ω4Ω

安全注意事项

KAC-9405 KAC-9405M

4/3/2 CHANNEL POWER AMPLIFIER

INSTRUCTION MANUAL

4/3/2 声道功率放大器

使用说明书

WARNING

To prevent injury or fire, take the following precautions:

• Mounting and wiring this product requires skills and experience. For safety’s sake, leave the mounting and wiring work to professionals.

• When extending the ignition, battery, or ground wires, make sure to use automotive-grade wires or other wires with the range of 5 mm² (AWG 10) or more to prevent wire deterioration and damage to the wire coating.

• To prevent a short circuit, never put or leave any metallic objects (such as 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.

CAUTION

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 a short circuit 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.

CAUTION

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.

To prevent battery rise

When the unit is used in the ACC ON position without turning the engine ON, it depletes the battery. Use it after starting the engine.

Protection function

The protection function is activated in the following situations:

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.

• When a speaker wire may be short-circuited.

• When a speaker output contacts ground.

• When the unit malfunctions and a DC signal is sent to the speaker output.

7 Wiring

• Take the battery wire for this unit directly from the battery. If it's connected to the vehicle’s wiring harness, it can cause blown fuses etc.

• 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 wire.

• Do not allow the wire to directly contact the edge of the iron plate by using Grommets.

• Connect the ground wire 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 wire is not connected.

• Be sure to install a protective fuse in the power cord near the battery. The protective fuse should be the same capacity as the unit’s fuse capacity or somewhat larger.

• For the power cord and ground, use a vehicle type (fireproof ) power wring cord. (Use a power wiring cord with the range of 5 mm² (AWG 10) or more.

• When more than one power amplifier are going to be used, use a power supply wiring wire and protective fuse of greater current-handling capacity than the total maximum current drawn by each amplifier.

7 Speaker Selection

• The rated input power of the speakers that are going to be connected should be greater than the maximum output power (in Watts) of the amplifier. Use of speakers 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 connect suitable speakers to the amplifier

<Example>.

警告

为了防止受伤和火灾，请遵守下列注意事项。

• 安装本产品和连接导线需要一定的技能和经验。为了保证安

全，应请专业人员完成安装和连接导线作业。

• 当延长蓄电池导线和接地导线时，请使用车辆用导线或

5mm2（AWG 10）以上的导线，以防止导线劣化和被覆面的损伤。

• 为了防止短路等事故，请勿将金属物品（硬币，工具等）掉

落在装置中。

• 万一装置冒烟或有异味时，请立即关闭电源，并与建伍经销

商洽谈。

• 在使用中请尽量不要接触装置表面。因为装置在使用中表面

发热会烫伤人体。

注意

为了防止装置发生故障，请遵守下列注意事项，正确操作和使用。

• 请以负接地线的12V直流电源向本装置供电。

• 请勿打开顶部和底部的盖子。

• 请勿将本装置安装在曝露于直射阳光，高温或高湿，水可

能飞溅的或有灰尘的地方。

• 更换保险丝时，请更换规定容量相同的保险丝，如使用不

同容量的保险丝，可能会造成装置的故障。

• 更换保险丝时，为了防止短路事故，请先拔下来电源线束再

进行更换。

注

• 安装有困难时，请与建伍经销商洽谈。

• 如果仍不能恢复正常时，请与建伍经销商洽谈。

装置的保养

如果外表污脏时，请关闭电源，使用干燥的硅布或柔软的布匹擦拭。

注意

请勿使用硬布或涂料稀释剂，酒精等挥发性溶剂，以免损坏外表面或将所附指示字符擦掉。

防止蓄电池全部放电

当本机在ACC ON位置使用而不开动发动机时，将消耗蓄电池的电量。请在开动了发动机之后使用。

保护功能

在以下场合中保护功能被激活本机装有保护功能，可以保护本机以及扬声器不会受到可能

发生的各种意外事故的损害。当保护功能被触发时，电源指示灯将熄灭，放大器也停止

工作。

• 当扬声器缆线短路时。

• 当扬声器的输出接地时。

• 当本机出现误动作，有 DC（直流）信号传送到扬声器输出

端时。

7 接线

• 请将本机的蓄电池连接线直接与蓄电池连接。如果与汽车

的配线束连接，将产生烧毁保险丝等故障。

• 如果发动机运转时从扬声器中发出噪音，可以在蓄电池的每

根连线上加一个线路噪音滤波器（选购件）。

• 使用保护套，以防缆线直接接触铁板的边缘。

• 将接地线连接到车架的金属部位，车架起到车辆电气接地的

作用，将电流传递到蓄电池的负极·。如果接地线没有连接就不要打开电源开关。

• 应务必在蓄电池附近的电源连接线上设置保险丝。保险丝

的规格应该与本机的保险丝容量相同或者略大。

• 对于电源连接线和接地线，请使用汽车用（防火）电源连接

线。（请使用截面积为5mm2（AWG 10）或者以上的电源连接线。）

• 当使用多个功率放大器时，电源导线的电流容量及保险丝的

容量要大于各个放大器的使用电流之和的最大值。

7 扬声器选择

• 准备连接的扬声器的额定功率要大于放大器的最大输出功

率。如果扬声器的额定功率小于放大器的最大输出功率则会导致扬声器冒烟以至损坏。

• 所连接的扬声器的阻抗必须为 2 欧姆或更高（立体声连接

时）；或者 4 欧姆或更高（桥路连接）。当使用一组扬声器时，必须在计算扬声器的总阻抗之后，再连接合适的扬声器。

＜例＞

综合阻抗

Combined impedance

Installation / 安装 Connection / 连接

Accessories / 附件

ø 4 x 16 mm

M4 × 8 mm

Hexagon socket head cap screw

内六角螺钉

Dressing cover

装饰板

Self-tapping screws / 自攻螺钉

Speaker level input cable / 扬声器音量输入电缆

Hexagon wrench / 六角扳手

3 Parts included / 配件

Cooling fan

冷却风扇

Installation board, etc. (thickness : 15 mm or more)

安装基板，等（厚度：不小于 15 mm）

1 Parts included

配件

Installation procedure

Since there are large variety of settings and connections possible according to applications, read the instruction manual well to select the proper setting and connection.

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. Remove the Dressing cover.

4. Connect the input and output wires of the units.

5. Connect the speaker wires.

6. Connect the power wire, power control wire and grounding wire following this order.

7. Install the installation fittings in the unit.

8. Attach the unit.

9. Attach the Dressing cover.

10. Connect the negative · terminal of the battery.

CAUTION

• Do not install in the below locations;

(Unstable location, In a location that interferes with driving, In a location that gets wet, In a dusty location, In a place that gets hot, In a place that gets direct sunlight, In a location that gets hit by hot air)

• 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.

• The surface temperature of the amplifier will

become hot during use. Install the amplifier in a place where people, resins, and other substances that are sensitive to heat will not come into contact with it.

• This unit has cooling fan to decrease the internal

temperature. Do not mount the unit in a place where the cooling fan and ducts of the unit are blocked. Blocking these openings will inhibit the cooling of the internal temperature and result in malfunction.

• When making a hole under a seat, inside the

trunk, or somewhere else in the vehicle, check that there is nothing hazardous on the opposite side such 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 installing the unit, check to make sure that

electrical equipment such as the brake lamps, turn signal lamps and windshield wipers operate normally.

安装步骤

根据使用场合的不同，可能有多种不同的连接及设定方式请务必仔细阅读使用说明书，选择适当的连

接和设定。

1. 拔取点火钥匙，拆掉蓄电池负极路。

2. 根据使用目的，设置本机到妥当位置。

3. 去掉装饰板。

4. 连接本机的输入和输出缆线。

5. 连接扬声器缆线。

6. 连接电源线，电源控制缆线及地线，不可违反此顺序。

7. 向本机安装装配部件。

8. 安装本机。

9. 装上装饰板。

10. 连接蓄电池的负极·。

·端子，以防短

注意

· 不得在下列位置安装；

（不稳定的位置，妨碍驾驶车辆的位置，潮湿的位置，灰尘较多的位置，受热的位置，阳光直射的位置，热气接触的位置）

· 不可将本装置安装在绒毯底下，否则，蓄热会导

致本装置损坏。

· 将本装置安装在热量容易发散的地点。

一旦安装完毕，不可在其上放置其它物品。

· 机器使用过程中，机体表面会发热升温。所以其

安装地点应该是人体，树脂及其它热敏感物质不易触及的地方。本装置设有冷却风扇用来降低内部温度。请不要

安装在遮挡冷却风扇和风管的位置。堵塞通风孔的后果是内部温度升高，引起系统故障。

· 在车座，行李箱底部或车子其它部位打洞时，应

确认其背面没有会受到损坏的物件，诸如油箱、刹车用配管或线路管套等，千万不可擦伤或损坏这些物品。

· 不可安装在驾驶室仪表板，尾部底板或保险气囊

等部件之上。

· 将本机安装在车内时，应确保固定牢靠，且不会

对驾车造成妨碍。如果因为冲击造成本机脱落且撞及人体或保险部件，就会导致伤害或事故。

· 在本装置安装之后，应该确认电气设备，比如刹

车灯、转向信号灯以及雨刷等操作正常。

WARNING

Particular attention must be given to making good electrical contact at the amplifier-output and speaker terminals.

Poor or loose connections can cause sparking or burning at the terminals because of the very high power that the amplifier can deliver.

CAUTION

• If sound is not output normally, immediately turn power off and check connections.

• Be sure to turn the power off before changing the setting of any switch.

• If the fuse blows, check wires for shorts, then replace the fuse with one of the same rating.

• Check that no unconnected wires or connectors are touching the car body. Do not remove caps from unconnected wires or connectors to prevent short circuits.

• Connect the speaker wires to appropriate speaker connectors separately. Sharing the negative wire of the speaker or grounding speaker wires to the metal body of the car can cause this unit to fail.

• After installation, check that the brake lamps, turn signal lamps and windshield wipers work properly.

警告

要特别注意放大器的输出口和扬声器端子处有良好的电气接触。因为放大器要发出非常高的功率，松弛或不良的连接可能在端子处产生火花甚至燃烧。

注意

· 如果声音输出不正常，应立即关断电源并检查连接是否正确。

· 在变更开关的设定时，必须首先切断电源。

· 当保险丝熔断后，要检查缆线是否有短路，并更换上相同规格

的保险丝。

· 检查是否有尚未连接的缆线或与车体相接触的端头。未连接缆

线及其端部的保护帽不可拆掉，以防短路。

· 扬声器的缆线要分别连接到各自的端子。共用扬声器的负极缆

线或将扬声器端子接地到汽车的金属部分，都会导致本机停止工作。

· 安装之后，请检查汽车的刹车灯、方向指示灯、雨刷等是否正

常动作。

Remove the ignition key and disconnect the negative · terminal of the

WARNING

警告

battery to prevent short circuits.

拔取点火钥匙，拆掉蓄电池负极·端子，以防短路。

7 Power wire and Speaker wire connection 7 电源线和扬声器线的连接

Protective fuse

保护保险丝

WARNING

To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery’s positive terminal.

警告

为了防止短路所引起的火灾，在蓄电池的正极附近连接保险丝或断电器。

Power control wire

电源控制缆线

Battery wire

蓄电池导线

Battery

蓄电池

Center unit (CD receiver, etc.) 中心装置（CD 接收机等）

Ground wire

接地导线

Bridged / 桥路

Stereo / 立体声

Lead terminal

引出端子

A.ch Right 右

A.ch Left 左

B.ch Right 右

B.ch Left 左

A.ch

B.ch

Connection / 连接

   

    





7 RCA cable or Speaker level input connection 7 RCA连接线或扬声器电平输入连接

RCA cable connections / 连接RCA 缆线

Center unit (CD receiver, etc.)

中心装置（CD 接收机等）

Power control wire

电源控制缆线

Speaker level input connections / 连接扬声器电平输入

Genuine-accessory car stereo (No line output center unit etc.)

原装车用立体声（没有线输出的中心装置等）

A.ch B.ch

2 Parts included

配件

RCA cable

RCA 缆线

System examples /

系统配置实例

 4-channel system  4 声道系统

 High-power 2-channel system  大功率 2 声道系统

Center unit

中心装置

Center unit

中心装置

Front left speaker

前置左扬声器

Front right speaker

前置右扬声器

Rear left speaker

后置左扬声器

Rear right speaker

后置右扬声器

Left speaker (Bridged)

左扬声器（桥路）

Right speaker (Bridged)

右扬声器（桥路）

产品中有毒有害物质或元素的名称及含量

部件名称

铅

(Pb)

汞

(Hg)

安装基板 × ○ ○ ○ ○ ○

框架 × ○ ○ ○ ○ ○

其他（附件） × ○ ○ ○ ○ ○

○：

表示该有毒有害物质在该部件所有均质材料中的含量均在 SJ/T11363-2006 标准规定的限量要求以下。 ×：表示该有毒有害物质至少在该部件的某一均质材料中的含量超出 SJ/T11363-2006 标准规定的限量要求。

该标识中表示的数字为自生产日期开始对环境的保护期限、表示不会因产品中含有的有毒有害物质或元素的外泄造成环境污染、以及对人体或财产造成严重损害的年数。该环境保护期限并不是对于性能、功能的保证期限。

表示例

在产品及电池等正常使用结束、进行废弃时，请遵守各地方政府的法律和规定予以处理。

For Turkey

Bu ürün 26891sayılı Resmi Gazete’de yayımlanan Elektrikli ve Elektronik Eşyalarda Bazı Zararlı Maddelerin Kullanımının Sınırlandırılmasına Dair Yönetmeliğe uygun olarak üretilmiştir.

This product complies with Directive, Number 26891 regarding "REGULATION ON THE RESTRICTION OF THE USE OF CERTAIN HAZARDOUS SUBSTANCES IN ELECTRICAL AND ELECTRONIC EQUIPMENT".

有毒有害物质或元素

镉

(Cd)

六价铬

(Cr(VI))

多溴联苯

(PBB)

多溴二苯醚

(PBDE)

Troubleshooting Guide

What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following table for possible problems.

PROBLEM POSSIBLE CAUSE SOLUTION

No sound. (No sound from one side.) (Blown fuse.)

The output level is too small (or too large). The sound quality is bad. (The sound is distorted.)

故障检修

有时被认为是故障的现象，其实是因微小的操作或配线失误而造成。在要求维修之前，请参照下表稍事检查为盼。

现象原因排除方法

没有声音（保险丝跳断）

输出电平过低（或过高） · 输入灵敏度调节不当，没有位于妥当位置。 · 调节该控制器。请参考 <控制>。声音质量很差（声音失真）

• Input (or output) cables are disconnected.

• Protection circuit may be activated.

• Volume is too high.

• The speaker cord is shorted.

• The input sensitivity adjusting control is not set to the correct position.

• The speakers wire are connected with wrong ª/·polarity.

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

• The switches may be set improperly.

· 输入（或输出）缆线未连接。

· 保护线路可能被触发。

· 音量过大。

· 扬声器电线短路。

· 扬声器缆线的极性

· 扬声器缆线的一根被车体螺钉压迫。

· 开关的设定可能不妥。

ª/·连接错误。

• Connect the input (or output) cables.

• Check connections by referring to <Protection function>.

• Replace the fuse and use lower volume.

• After check the speaker cord and fixing the cause of the short, replace the fuse.

• Adjust the control correctly referring to <Controls>.

• Connect them properly checking the ª/· of the terminals and wires well.

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

• Set switches properly by referring to <System examples>.

· 连接输入（或输出）缆线。

· 参考 <保护功能> 一节，检查连接状况。

· 请更换保险丝，减小音量。确认扬声器线，解除短路原因后，更换保险丝。

· 请将缆线的极性ª/·连接正确。

· 重新连接缆线，使之不再受螺钉压迫。

· 请参考 <系统配置实例>，将开关正确设置。

NOTE

Do not connect cables and leads to both RCA cable input jacks and the speaker level input terminals simultaneously, for this may cause malfunction or damage.

注

不可同时连接缆线和引线到 RCA 缆线输入端子及扬声器输入端子。否则，将造成误动作或损坏。

Controls /

控制

Cable color of the connector / 接头连接线颜色

A channel Left / A声道左输入

A channel Right / A声道右输入

B channel Left / B声道左输入

B channel Right / B声道右输入

White / 白色

White-Black / 白色-黑色

Gray / 灰色

Gray-Black / 灰色-黑色

Green / 绿色

Green-Black / 绿色-黑色

Purple / 紫色

Purple-Black / 紫色-黑色

 2-channel + Subwoofer system  2 声道 + 副低音扬声器系统

Center unit

中心装置

Left speaker (high pass)

左扬声器（高通滤波器）

Right speaker (high pass)

右扬声器（高通滤波器）

Subwoofer (Bridged)

副低音扬声器（桥路）

Specifications

Specifications subject to change without notice.

Audio Section

Max Power Output ..........................................720 W (180 W × 4)

Rated Power Output (+B = 14.4V) Normal (4 Ω) (20 Hz – 20 kHz, ≤ 0.08 % THD) ...60 W × 4

(2 Ω) (1 kHz, ≤ 0.8 % THD) ...........................90 W × 4

Bridged (4 Ω) (1 kHz, ≤ 0.8 % THD) ........................180 W × 2

Speaker impedance .............................................................2 Ω – 8 Ω

4 Ω – 8 Ω (Bridged)

Frequency Response (+0, –3 dB) ....................... 5 Hz – 50 kHz

Sensitivity (rated output) MAX. ............................................0.2 V

MIN. ............................................. 5.0 V

Signal to Noise Ratio .................................................................... 95 dB

Input Impedance ...........................................................................10 kΩ

Low Pass Filter Frequency (-12 dB/oct.)

.....................................................50 Hz – 200 Hz (variable)

High Pass Filter Frequency (-12 dB/oct.)

.....................................................50 Hz – 200 Hz (variable)

Bass Boost Control (40 Hz / B channel) .................0 / +18 dB

General

Operating Voltage ........................ 14.4 V (11 – 16 V allowable)

Current Consumption ..................................................................34 A

Dimensions (W × H × D) ...........................280 × 59 × 238 mm

11 × 2-5/16 × 9-3/8 inch

Weight .........................................................................2.8 kg (6.1 lbs)

This is a 4 channel amplifier including 2 stereo amplifiers in a body. One amplifier is referred to as amplifier A and the other is amplifier B. This unit is compatible with a large variety of systems by combining the switches and functions described in the following.

1 Fuse (30 A x 2)

NOTE

If you can’t find the specified capacity fuse at your store etc., consult your Kenwood dealer.

2 Battery terminal (BATT.) 3 Ground terminal (GND) 4 Power control terminal (P.CON)

Controls the unit ON/OFF.

NOTE

Controls the unit power. Be sure to connect it with all the systems.

5 Speaker output terminals (A.ch/B.ch)

• Stereo Connections:

When you wish to use the unit as a stereo amplifier, stereo connections are used. The speakers to be connected should have an impedance of 2Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 2Ω or greater for each channel.

• Bridged Connections:

When you wish to use the unit as a high-output monaural amplifier, bridged connections are used. (Make

connections to the LEFT channel 9 and the RIGHT channel · SPEAKER OUTPUT terminals.) The speakers to be connected should have an impedance of 4Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 4Ω or greater.

6 FILTER switch (A.ch/B.ch)

This switch allows to apply high-pass or low-pass filtering to the speaker outputs.

• HPF (High-Pass Filter) position:

The filter outputs the band of higher frequencies than the frequency set with the "HPF FREQUENCY" control.

• OFF position:

The entire bandwidth is output without filtering.

• LPF (Low-Pass Filter) position:

The filter outputs the band of lower frequencies than the frequency set with the "LPF FREQUENCY" control.

7 Operation switch (A.ch/B.ch)

The amplification methods of the signals input can be selected.

• STEREO position:

The amplifier can be used as a stereo amplifier.

• MONO (Lch) position:

Amplifies the signal input from the left side only. Set to this position and make bridged connections to use as a highpower monaural amplifier. (The input right signal is not output.)

8 LPF/HPF FREQUENCY control (A.ch/B.ch)

Sets the cutoff frequency when the "FILTER" switch is set to "HPF" or "LPF".

9 INPUT SENSITIVITY control (A.ch/B.ch)

Set this control according to the pre-output level of the center unit connected with this unit. The sensitivities of amplifiers A and B can be adjusted independently.

NOTE

For the pre-output level, refer to the <Specifications> in the instruction manual of the center unit.

0 BASS BOOST switch (B.ch)

Setting this switch to "ON" emphasizes the bass. You can use the BASS BOOST for amplifier B only.

• ON position:

BASS BOOST is +18 dB.

• OFF position:

BASS BOOST is off.

- LINE IN terminal (A.ch/B.ch) = SP LEVEL INPUT terminal

The genuine-accessory car stereo shall have a maximum power output of no more than 40 W. The power is turned on and off as the unit detects input signal (SIGNAL SENSING TURN-ON). Therefore it is not necessary to connect the power control wire.

~ Power indicator

When the power is turned on, the Power indicator lights.

本机为机体内装载了2台立体声的4 声道放大器。其2台放大器之中一台称为Ａ，另一台则称为Ｂ。如下所记，可以对应开关切换操作及各种功能组合系统。

1 保险丝 (30 A x 2)

注

万一在销售店等找不到指定容量的保险丝的话,请与建伍专销公司联系。

2 BATT. (蓄电池) 端子 3 GND (接地) 端子 4 P.CON（电源控制）端子

控制本机的接通／关闭。

注

控制本机电源。应务必与全部系统连接。

5 SPEAKER OUTPUT (扬声器输出) 端子 (A.ch/B.ch)

• 立体声连接端子:

当您希望本机作为立体声放大器时，必须使用立体声连接端子。

所连接的扬声器的阻抗必须为 2 欧姆或更高。当多个扬声器被连接时，必须保证每声道的综合阻抗大于或等于 2 欧姆。

• 桥路连接端子:

当您希望本机作为大功率单声道放大器使用时，可以进行桥路连接。（连接LEFT声道 9 、RIGHT声道 · 及 SPEAKER OUTPUT 端子）所连接的扬声器的阻抗必须为 4 欧姆或更高。当多个扬声器被连接时，必须保证每声道的综合阻抗大于或等于 4 欧姆。

6 FILTER（滤波器）开关 (A.ch/B.ch)

本开关可以对扬声器的输出进行高通滤波器的或低通滤波器的滤波处理。

• HPF（高通滤波器）位置:

滤波器将输出高于 "HPF FREQUENCY"控制设定值的波段。

• OFF（关闭）位置:

滤波器将不进行任何滤波处理，输出整个波段。

• LPF（低通滤波器）位置:

滤波器将输出低于 LPF FREQUENCY控制设定值的波段。

7 操作开关 (A.ch/B.ch)

输入信号的放大方法可以选择。

• STEREO（立体声）位置:

放大器可以作为立体声放大器使用。

• MONO（Lch）（单声道-左声道）位置:

只放大从左声道输入的信号。切换到此位置可以进行桥路连接，作为大功率单声道放大器使用。（输入的右声道信号不输出）

8 HPF/LPF FREQUENCY（高通滤波频率）控制 (A.ch/B.ch)

当把 "FILTER" 开关切换为 "HPF" 或 "LPF" 时，可以调整遮断频率。

9 INPUT SENSITIVITY（输入灵敏度）控制 (A.ch/B.ch)

根据与本放大器连接的中心装置的前置输入水评调节本控制钮。放大器 A 和 B 可以分别设定其灵敏度。

注

关于中心装置的前置输出电平，请参考其使用说明书。

0 BASS BOOST（低音提升）开关 (B.ch)

"ON"可以加重本机的输出。低音提升仅限

于放大器B。

• ON（接通）位置:

低音提升+18dB。

• OFF（关闭）位置:

低音提升断开。

- LINE IN（线输入）端子 (A.ch/B.ch) = 扬声器电平输入端子

车内原装立体声的最大输出功率不得大于 40 瓦。本装置检测输入信号（SIGNAL SENSING

TURN-ON），接通或切断电源。因此，

无需连接电源控制缆线。

~ 电源指示灯

当电源打开时，电源指示灯点亮。

规格

规格可能会变更，恕不另行通知。音频部

最大输出功率 ................................... 720 W (180 W × 4)

额定输出功率 (+B = 14.4V) 普通 (4 欧姆) (20 Hz

.................................................... 60 W × 4

(2 欧姆) (1 kHz, 桥路 (4 欧姆) (1 kHz,

扬声器阻抗 .............................................

4 kΩ

频率响应 (+0, — 3 dB) .................................5 Hz — 50 kHz

灵敏度(额定输出) 最大 ...........................................

最小 ............................................

信噪比 ..................................................................

输入阻抗 .................................................................

— 20 kHz, ≤ 0.08 % THD)

≤ 0.8 % THD) .................90 W × 4

≤ 0.8 % THD) ...............180 W × 2

2 kΩ — 8 kΩ

— 8 kΩ (桥路)

10 kΩ

0.2 V

5.0 V

95 dB

低通滤波器过滤频率 (-12 dB/oct.) ...50 Hz — 200 Hz (可变) 高通滤波器过滤频率 (-12 dB/oct.) ...50 Hz — 200 Hz (可变)

低音增强控制（40 Hz）（B声道） ..................... 0 / +18 dB

共同

使用电压 ....................................14.4 V (允许11 — 16 V)

消耗电流 ...................................................................

安装尺寸（宽×高×深） ..................280 × 59 × 238 mm

重量 .................................................................

34 A

2.8 kg