Car Subwoofer Types and Applications

Currently only the few high-end cars (such as the new Mercedes-Benz S-CLASS Series, Lexus LS430) mounted subwoofer. Thus, the vast majority of the original car audio are difficult to reproduce rich, deep and powerful sound, experience a sense of bass less than the shock.

 

In the car audio system, the installation location is limited, subwoofer unit is typically installed only on the rear luggage compartment. Car driving car road noise and internal structural conditions will reduce the bass, install the appropriate high-performance subwoofers solve the problem, so as to maintain tonal balance.

When selecting the subwoofer according to their preferences. If you pay attention to the sound quality, you can choose sealed subwoofer. It features sound easy to control, better sound quality, but less efficient. If you like to listen to “blow up” sound, there are optional with holes down box, which is characterized by large volume, high efficiency, but the low volume of the speaker size requirements more stringent, inverting the tube diameter and length there are certain requirements.

Subwoofer choice.

A car audio system is good or bad depends largely on the effect of the replay subwoofer performance. In addition, the car is moving will lose a lot of bass. How to remedy the loss of bass, while ensuring the car is stationary bass does not seem superfluous? Properly handle this issue, you first need to design a suitable casing, while the speaker unit to maximize performance; second, what kind of car with what kind of speakers. Now subwoofer There are many types of installation methods are sealed, flat type, embedded, rotary, bandpass, phase hole type, reverse type and so on. Car with the luggage compartment of the plane should be selected and sealed enclosure, and bandpass subwoofer mounted in the van, jeep, the effect is very good; Third, choose adequate power amplifier driver; fourth, to find the car resonance frequency, on the equalizer to decay, thus minimizing the noise generated; fifth, to ensure adequate power supply. As long as the above points are generally able to obtain satisfactory bass.

Mounting

Because professional car audio technician familiarity with different box, use different ways to install, resulting in the same kind of horn is not the same in the installed position of the luggage compartment, the effect is not the same.

1. The planar

Original car subwoofer comes with commonly used surface mounting method. In everyday modification, often in the back seat of the original car speaker baffle position alteration, installation of 8 to 10-inch subwoofer. This approach, since the luggage space is relatively large, focused sound waves do not affect the results, but easy to install, and easy to get the sound field balance, the absence of a robust housing fixed horn, mounted on the car so hard to get the desired effect not recommended using this method.

2. Embedded

Embedded installation method, subwoofer and other audio equipment in the mold of his assistant, seamless. The only drawback is that, due to the back of the speaker and the isolation layer spacing is too small, limited space, we can not give full play to the performance of the woofer, and the installation process is relatively complex, part of the luggage compartment should all apart to complete modification.

3. Rotary

Rotary is more common in the retail market, this low-frequency limit housing high, and less efficient, but easy to make, easy to install this type of installation process requirements are not too high.

4. With formula

Subwoofer with a formula suitable for installation in the van, jeep, which can produce very good results. With a long stroke, a large magnet subwoofer, low dive full, powerful bass, crystal clear. Bass with the general formula of the box is closed based on the speaker to add a bandpass filter, in order to achieve the enhanced role and extended low frequencies. Acoustic bass cabinet with formula catheter design, the key to whether it can eliminate cabinet resonance, to ensure the quality of bass reproduction. Now with many using the formula box shaped bass sound conduit structure (to be purchased on the market), in order to reduce cabinet resonance.

5. The phase inversion hole

That tape with holes down box, inverted airflow inside the box. This box high efficiency, low-frequency limit is low, but the size of demanding production. Vibration phase hole in the air column, enhanced acoustic shock, so sound quality is unique, to overcome the shortcomings of traditional speakers. In the same case using single speaker, vented cabinet with a volume of more prominent than the formula, since the radiation only by the back of the speaker hole inverting output, low dive deeper, small nonlinear distortion, power handling big, loud sound output is good, feeling in feet. Vented housing shortage is lower than the resonant frequency response of the speaker, not the use of anti-vibration cabinets air force control coil vibration, easy to produce low-frequency resonance, severe damage to the sound quality.

6. inverting formula

Currently inverted bass speakers are rare, usually installed in the trunk of the isolation layer, the principle use of sound waves in the back of the speaker vibration generated by resonance in the trunk. Its shortcomings and planar same. When the subwoofer and speakers installed, you should use the divider, to avoid interference and choose adequate power amplifier drive, but try to find inside the resonant frequency to be reduced in the equalizer, thus minimizing the noise generated

目前仅少数几款高档车(如新款奔驰S-CLASS系列、凌志LS430)装有低音扬声器。因此,绝大多数原车音响都难以重放出丰满、深沉有力的声音,体会不到低音所带来的震撼感。

     汽车音响系统中,由于安装位置受限,超低音单元通常只安装在后行李厢中。汽车行驶中路面噪音以及汽车内部结构条件会降低低音效果,安装适当的高性能超低音扬声器可解决该问题,从而保持音调平衡。

    选择超低音扬声器时应根据各人喜好而定。如果重视音质,可选择密封式低音音箱。其特点是声音易控制,音质较好,但效率较低。如果喜欢听炸机声,可选择有倒相孔的箱体,其特点是音量大,效率较高,但低音箱容积尺寸要求较严格,倒相管直径和长度也有一定要求。
低音音箱的选择。

    一套汽车音响系统重播效果的好与坏很大程度上取决于超低音音箱的表现。另外,汽车在行驶时也会流失很多低音。怎样补救流失的低音,同时保证汽车处于静止状态时低音不显得多余?要处理好该问题,首先需设计一个适合的箱体,同时使喇叭单元最大限度地发挥性能;第二,什么样的车配什么样的音箱。现在超低音音箱有很多种类型,安装方式有密封式、平面式、嵌入式、旋转式、带通式、倒相孔式、反相式等。带行李厢的小轿车宜选密封式和平面式音箱,而带通式低音音箱安装在面包车、吉普车中则效果很好;第三,选择功率充足的功放驱动;第四,找到车厢共振频率,在均衡器上加以衰减,尽量减少因此产生的噪音;第五,保证充足电源。只要做到上述几点,一般都能获得满意的低音效果。

安装方式
    由于专业汽车音响技师对箱体的熟悉程度不一,安装时会采用不同的方式,造成同一种喇叭在行李厢的安装位置不一样,产生的效果不一样。

1.平面式
    
原车自带的低音喇叭通常采用平面式安装方法。在日常改装时,也常在原车后座挡板上的扬声器位置进行改造,安装810英寸的低音扬声器。这样的处理方式,由于行李厢空间相对较大,声波不集中,影响了效果,但安装方便,也易取得声场平衡,由于没有一个坚固的外壳固定喇叭,所以在汽车上安装很难获得理想效果,建议不采用这种方法。

2.嵌入式
    
采用嵌入式安装方法,低音喇叭与其它音响器材在模具的辅佐下,浑然一体。美中不足的是,由于喇叭背面与隔离层间距太小,空间有限,不能充分发挥低音喇叭的性能,且安装工艺较复杂,要把行李厢部分全部拆开才能完成改装。

3.旋转式
    
旋转式在零售市场较常见,这种箱体低频下限偏高,且效率较低,但易制作,这种形式安装方便,对安装工艺要求不太高。

4.带通式
带通式低音音箱适合安装在面包车、吉普车里,能产生很好的效果。采用长冲程、大磁钢超重低音扬声器,低频下潜充分,低音强劲有力、纯净通透。带通式的低音箱体就是在普通密闭音箱基础上增加一个带通滤波器,以实现增强和扩展低频的作用。带通式低音箱体声导管结构设计,关键是否能杜绝箱体谐振,保证低频重放质量。现在带通式低音箱体很多采用异型声导管结构(市场上可购买到),以减少箱体谐振。

5.倒相孔式
    
即带倒相孔的箱体,气流在箱体内部倒相。这种箱体效率高,低频下限低,但制作尺寸要求严格。倒相孔中空气柱的振动,加强了声波的震荡,使音质表现独特,克服了传统音箱的弊病。在同样使用单只喇叭的情况下,倒相式箱体的音量比带通式更突出,由于喇叭背面的辐射仅通过倒相孔输出,所以低频下潜较深,非线性失真小,承受功率大,大音量输出时音质好,量感足。倒相式箱体的不足是喇叭响应低于谐振频率,不能利用箱体内空气的反振力控制音圈振动,易产生低频共振,严重时破坏音质。

6.反相式
    
目前反相式低音扬声器较为少见,通常安装在后备箱隔离层处,其原理利用扬声器的背面在振动时产生的声波,在后备箱内产生共振。其不足之处与平面式相同。 低音喇叭和音箱安装时,应使用分频器,以避免干扰,选择功率充足功放驱动,同时尽量找出车厢内共振频率,在均衡器上加以衰减,尽量减少因此而产生的噪音


Post time: Apr-04-2016