Tag Archives: 2 way crossover

11 installed disturbing public speaker is a small penalty

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2 way crossover – China Manufacturer
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Mr. Zhang reflects the people: I live in Tongzhou District, near the west gate, usually always hear the mini-bus air horn sound harsh,

affecting normal life of residents. What can reduce the speaker volume?

Re: Beijing Hi-Tech Co., Ltd. Operations official said the passenger, the company removed all vehicles from last year s air horn, and is

equipped with "electric snail" type tweeter vehicles, the replacement for the 105 db within the normal speakers. If you still find people

using air horns of the Henderson passenger vehicles, can remember the number, call the company telephone 69591016 to report

complaints.

After receiving the reports from the public, by Henderson s passenger lines, check-by-site passenger car horn, found 220 passenger

vehicles, there are 11 privately install the air horn, the company has removed them, punished and made to give the owner education.

Our reporter Li Yan

Western Hills forest area will be the installation of temporary street language

Wu reflects the people: I am Paul Leisy mountain language district property owners, stay almost 3 years, but the district one, two

have not been installed between the street, the dark night, hoping to install street lights.

Re: Paul Leisy mountain language community Poly Property Management (Beijing) Co., Ltd., said district one, two for the road

between the building developer collected on behalf of the municipal road. City street last month, the property management center to

report installed. Thus matter involves street repair and maintenance and lighting costs, not the formal planning and design of street

lights installed in the short term.

Currently, the property is contact the developer, the first in this section to install temporary lights on road safety issues.

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room acoustic treatment considerations

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2 way crossover – China Manufacturer
Thank you for inquiry my 2 way crossover, Tel: +86.573.8468.1673, E-mail: futuresound@mailzj.cn
http://www.chinafuturesound.com/key-2-way-crossover-16/

TV / home theater / audio notes – alert – tips article: introduces the indoor acoustic treatment of some note. The following order by the purchase shopping network, available to you for reference.

Notes room acoustic treatment

1, placed a good speaker

The right speaker is placed in the room to get a good sound effect playback key. If in accordance with the preceding sections of this chapter on the introduction of speaker placement, spend a few hours, while for the speaker while listen to find the right placement, will not only be able to get a good sound effect playback, but also increase the listening experience and be able to hear sound differences. All the indoor acoustic treatment are placed in series with the appropriate speakers based. Speakers such as the wrong place, the rest all efforts were in vain.

2, the room s length, width and height should have a good proportion of

Although in most cases, the room is already building the good. Length, width and height ratio had a good set. But if given the opportunity to choose rooms for listening room, in order to avoid standing waves as much as possible is best to refer to chapter 3.1 listed in the room length, width, high percentage. Because it is so hi-fi equipment to get a good sound effect playback of a selected precondition.

3, parallel to the surface to avoid bare

Xiu Xiu if the light in the room without any acoustic treatment of the face parallel to the surface, will hear many times back to gas. Just laying in one of the absorbing surface materials, such as sound-absorbing foam, the United States to eliminate many ASC s echo of the sound-absorbing material, a small piece of tapestry or carpet-like sound-absorbing material, in particular, ASC s Tube Trap of the class-specific acoustic equipment, which can absorb more bass, so that the side wall of the diffusion-wave and eliminate multiple echo.

4, absorption or scattering of the side wall and the ground reflection

Have to try to sound at the listening position with the smooth before laying a carpet on the ground with the listening position in the speaker s side wall absorption or scattering of sound waves posted some of the material to avoid close proximity to the speaker have bare walls and windows and the like reflections the surface. U.S. ASC s Tower Trap absorption tube, a variety of sound-absorbing foam and RPG diffusion screen, able to be effectively used to eliminate the side wall reflections. Placed in the side wall side of the shelves can be a good spread of sound waves.

5, so reflective material away from the speaker

Audio rack, power amplifiers, furniture and other objects placed in close proximity to speakers, audio-visual and sound field variation are causes. Therefore, these objects will have to try to move away. Such as moving the speakers back. If you can not move, they should be covered with sound-absorbing material.

6, for a high with a slope between the height of the room

Although not always possible to do so, but if it can choose a higher altitude and slope with some room to make it better and better listening room. This room can be changed not only between the floor and the ceiling of room resonance modes can also reduce early reflections on the listening position, so that a more vigorous bass rounded sense of space is more spacious. Speakers should be placed in the lower end of the ceiling.

7, treble and bass to balance the absorption of

Most of the room will tend to absorb too much treble, while the bass absorption is not enough. Required carpets, curtains and soft furnishings and the like with some supporting the use of the material to absorb the bass, so that the reverberation time in the band can remain unchanged. Too heavy and slow bass is not balanced by the reverberation caused.

8, moving the listening position, so to achieve the best balance of bass

Standing in the room have some constant pressure and whispered loudly pressure area. You can try moving the listening position, in order to achieve the best balance. To avoid sitting near the back wall of words, because there would be too bass heavy.

9, with irregular flat or bizarre objects to disrupt the graphics in chaos

Specifically to put some furniture or objects will help disrupt the formation of standing waves indoors. Placed at the listening position behind some large pieces of furniture will make the listener back to those back wall reflection spread.

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home audio Precautions

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stage speaker – China Manufacturer
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Home audio Note – alert – tips article: to introduce you to the home stereo use should be noted that four major issues. The following order by the purchase shopping network, available to you for reference.

Caution home audio

The interference of the family listening environment, in general, not very serious. Because neither the same line of high-capacity electrical and mechanical equipment start braking, nor a large inductive component EMF impulse. The most common interference is mounted on the same line 1KW of air conditioners and refrigerators as well as a few hundred watts of fluorescent light start flashing and other electrical interference. Of course, the situation is particularly serious in these disturbances, they will not use listening devices, in addition, there is noise interference, radio interference will affect the listening effect.

1, power glitches,

The air conditioner, refrigerator, fluorescent circuit opening and closing the power supply lines to form a peak pulse power it through the audio device into rectifier transformer and power supply, affecting sound equipment work, resulting in noise disturbance, for the kinds of interference phenomenon, we must take the following measures to overcome:

(1) in the audio input into the anti-jamming network, used to filter out start braking EMF interference.

(2) where possible, using an independent power supply circuits, audio equipment and then into the small-capacity regulator family online.

(3) the use of isolation transformers, the use of magnetic flux leakage reactance of the role of high-frequency interference filter to reduce its impact.

(4) audio power amplifier using a separate power supply unit method to reduce the load on the pre-amplifier power amplifier instant impact.

(5) In a separate power amplifier unit, the power to sing the first note, deck, CD, and the intermediate frequency balancing circuit, reverb and other circuits of the ground wire, can not be mixed with the amplifier. In their ground together later, and then together with the amplifier unit.

2, the radio interference

Usually in a common room surrounded by electromagnetic fields. High-frequency magnetic field fluorescent flicker, welding radiation around the village, with wireless phone and other radio frequency electric field will affect the sound, connect the cable or connector at the high-frequency induction will cause interference, in order to reduce these disturbances must be take the following measures:

(1) audio equipment shielding. Fluorescent lights, air conditioners, refrigerators, cable wire twisted together to go to the electromagnetic induction or cancel each other to minimize the impact.

(2) electrical equipment, electrical power lines with pipe laying.

(3) audio cables between devices, in addition to shielding, the shield should be grounded.

(4) audio and video cables without shielding case, as far as possible away from the lighting wires or other electrical cables.

3, the audio-frequency interference

In the audio pickup and Kara OK in concert, the listening room or outside will affect the listening audio effects, should take measures to avoid interference with the sound source.

4, the noise of the formation and elimination methods

In the audio amplifying the noise process can be divided into white noise, pops, hum, induction sound. The noise on the listener is deeply unhappy. So in addition to using a variety of noise reduction and blanking circuitry, had to take other measures to be ruled out, the method is as follows:

(1) white noise is an irregular continuous rustling sound, which is thermal noise generated by the original device, only to find the originals produced, to be replaced in order to solve the problem.

(2) is an intermittent crackling sound of split shot. This flash from the circuit, capacitor leakage, caused by welding is not strong. Therefore, we must find step by step, to eliminate such problems.

(3) sense of hum is heard droning hum, which is caused by poor power supply filtering, it is necessary to strengthen the filter, re-adjust the whole arrangement and use of ground decoupling filter, so as to effectively solve the problem .

(4) The induced noise is a harsh hum, it comes from inside the machine s electromagnetic induction, or due to poor input preamplifier shielding electromagnetic induction. The solution is: shielded preamplifier input level and top pickup line, the magnetic switching power supply with the electromagnetic field as far as possible from the pre-amp off.

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BOSE powerful sound system evaluation Porsche Panamera

Have to admire the United States BOSE sound in acoustic technology and skill on the adjustment, with the Cadillac SLS3.0L shortly

before the 15 single audio and video systems, car audio converted to engage industry experts to send it a “convinced” ; This time

with the Porsche Panamera has 16 single sound system, let the experts sending it a “high” comment. However, unlike the Porsche

Panamera SLS3.0L BOSE system is so exhaustive, but especially courtesy of the boss, which is in the back seat listening to music, you

will have more surprises than the front. And SLS3.0L the same, BOSE and the number of monomers in the Panamera body set up to

16 sound system, play to make the “conquest of large-scale systems,” the game, and through the digital tuner, single design,

installation and configuration methods , so that before and after the 3-frequency sound field speakers, center speaker, a pair of

surround speakers, and hidden in the car boot of the subwoofer within the monomer, the release of good harmony sound. In

addition, thanks to digital audio control, thanks to the system in addition to providing traditional treble, bass, volume balance around 6

to adjust the positive and negative outside, but also to “linear” function to change the sound characteristics to achieve mentioned on

the functional annotation : “Recommended for fans of severe” effect; or in digital simulation, which allows conventional stereo

recording of the CD can sound clearer focus and sense of space.
Such a parade of huge systems, naturally not miss to provide USB, 3.5MM headphone jack style external signal terminal, so that use

can be provided by the host in the car 6 disc CD, MP3, DVD playback function other than to expand more listening pleasure. But

interestingly, Panamera 7-inch screen can play navigation map, reversing monitor can display is no way to play DVD video, do not know

the function of this seal is not the means to go through a special decoder to start? As for the sound performance, the back seat

listening to the Ho brother is full of praise for the “high” word, but the driver s seat in the upper level, I think, what factors have the

sense to listen to our different? Then I painted pure and clear, Mr. Li Zhihao verbal exchanges sense of hearing.
Pan permanent: the more advanced vehicles, and most of the consumers we have the same expectations related to the higher

quality requirements of equipment, the first Porsche rare three-way acoustic design, the installation of the low tone and external

trunk amplifier, stereo configuration count Hao Hua Chenrong.

Ming Tu pure: Yes, the first performance of the sound field of the sound field is very good, the sound field of sufficient height, width,

and a good audio-visual form, using a linear function of the host, so that the listener feel natural and comfortable.

Li Zhihao: linear model is a good design, will set a good equalizer for adjusting the sound as a professional, but it is worth noting that

with the family, the lifting of the linear mode, the performance of low-frequency sound in the amount of flu will become some

increase, but the texture fall, there will be areas in the human voice becomes slightly blurred.
Pan permanent: As an advanced car, Porsche has also selected in the audio famous BOSE cooperation of the United States, the

strange thing is, BOSE Timbre style as Chu s some changes, the two can share with us next?

Coated with pure clear: the United States and more bass-oriented sound, taste heavy, but this car is not such a style-oriented, the

most obvious is the lack of sense of the amount of low frequency.

Li Zhihao: Mr. James was right, listen to the voice of the car, the typical “German sound” design, in pursuit of a sound balance, fine to

feel, especially when listening to sound in the rear to achieve the best, is Original Sound of the few “good sound.”

Ming Tu pure: boss car, ha ha, the back of the sound to determine the experience even better than the front sound field more

depth, unfortunately many in the back of the control function, the independence of the lack of rear seat audio controls.
Pan permanent: to do so much comment period, the feeling is the easiest of all to listen to the sound sense of understatement in the

two old friends in the senior, one by one to get the answer, finally, I have asked the two to our audio enthusiasts Some of these cars

to the next modification suggestions, thank you!

Li Zhihao: Porsche s audio has indeed given a decent performance with the family, in pursuit of better sound quality to the

performance, I suggest the first step should be to improve the subwoofer, car, dress in a larger subwoofer , so that low-frequency

performance of the more vigorous, especially when watching video powerful subwoofer, will bring more U.S. audio-visual experience.

Pan permanent: Yes, ah, this is the three of us together have to feel deeply modified the project, improved speakers sound

recommendations on Mr. James s view it?

Ming Tu pure: Porsche s voice in the original configuration be terrific, in listening to some voices in the software, available on the host

linear listening mode, making the timbre minor increasingly professional style, but the music pursuit was thicker taste some, or

expectations of a higher density of voice users, it is recommended to use higher-quality speakers to replace the original car, after all,

with the original car, but was modified when the attention of the original car system is designed, to retain 5.1 audio decoding side

effects.

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modified car audio Seven Mistakes

Many owners think that if removed the old sound, new ones to complete the conversion. In fact, the demolition of a modified car

stereo is not so simple to install. Converted into car audio competition, exhibition, practical three types. Car audio conversion audio

conversion is in one.

As the owner of the car stereo is not enough to understand, often buy their own feelings, leading to difficult to play the best car

audio sound effects. Therefore, when making car audio conversion avoid the following seven errors.

Misunderstanding one: Many owners think that multi-disc CD player some complex process, so the price is higher than the single-disc

CD player, in fact, wrong. If you just want to pick a normal single-disc machine price is very cheap, but good quality single-disc machine

with a ten-disc player is almost the same price or even higher. Moreover, the development of technology has already solved the

changer changer instability problems, completely safe to use.

Myth two: buy home audio, most people think that the host, choose the same brand of speakers are better, so the car should use

the same brand of audio products, this is a misunderstanding. In fact, according to the host model, the power to carry out a

reasonable mix of different brands of products to create a good reception.

Myth three: say “a good horse with a good saddle,” must be assembled high-end luxury car audio, this is not true. What kind of sound

the assembly in full accordance with the owner s economic strength and to set the level of music appreciation. Alto owners will have a

set of more than $ 20,000 equipped with sound, the trunk of his car to put the two large speakers, any other items no longer fit, but

he said he did feel perfect musical journey.

Myth four: the bigger the better is not the nominal power, the greater horn of the real power, real power can only speaker to get

the results of testing instruments, in order to send the perfect music, perfect amplifier and speakers need to match.

Myth five: the crossover built-in speaker is not set the number of components number of components as possible, and can not play a

decisive role, the key depends on the quality of electronic components.

Misunderstanding Six: In the undistorted state, to ensure the speaker does not burn a significant vibration in the sound without losing

true state, the speaker of the higher frequency, indicating its higher sensitivity, the ability of the stronger performance of the sound,

it does not burn. But in the distortion of the state, is another matter.

Seven Mistakes: the bigger the better is not the speaker s magnet, magnets from high-density, low density, strong magnetic and

weak magnetic and other types, if it is a low-density weak magnet speakers, and its effects are not good, but bulky it is not easy to

install.

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three types of car audio conversion

Race-based car audio conversion

Game-based audio conversion is a large-scale changes to automotive interiors, and the installation of over-the speaker, resulting in

more than the voice of human tolerance limits. Modification is designed to competition winners rather than music. The above is an
pro audio speakers
audio conversion car photo contest entries. We can see from the photos, participating vehicles must complete the modification of the

outside sound system, but also for the sound characteristics of the interior make personalized changes. Installed in the car so many

speakers, the car will not only take up too much space, and all the speakers start with the sound is not generated by the ear can

bear.
garden speaker
Showcase car audio conversion

Showcase audio conversion audio manufacturers to promote products. Which is characterized by the use of modified equipment

varieties, exaggerated. The above display is a brand of car audio, car have been redesigned inside and outside. Although the vehicle is
line array speaker
very eye-catching, but the $ 5 million, the cost is very expensive. Showcase audio conversion in the design only consider the effect of

publicity, without regard to environmental protection, extensive use of glue and paint spraying. If you are driving it to work every day,

I am afraid that the owner already had formaldehyde poisoning. Showcase audio conversion audio conversion with the same type of

game, do not have practical value.

Practical car audio conversion

Practical for daily use audio conversion audio system is the main vehicle through a simple transformation to enhance the sound quality

purposes. Above the original car the car converted into single-disc CD master disc CD DAB radio host; the original front door of a small

car power cone speakers, replacement speakers split into a 6.5-inch, install split treble; and installed in the storage box 6 MD disc drive,

is a typical practical audio conversion.

Most owners will choose practical conversion. Practical to use audio conversion is to try to position the original vehicle, less changes to

the original car s interior style, occupies less space inside. And practical car audio conversion will not reduce the importance of the

original features, such as spare tire, tools, fire extinguishers. In this case, the sound quality to the best condition.

If you want to be practical audio conversion, a bunch of equipment to buy back their own DIY, or converted it to audio conversion

shop? Car audio products are semi-finished products, the quality of installation will affect 50% of product performance. If the

installation is a problem, ranging from sound harsh, achieving the desired results, while in the ignition circuit, causing the vehicle

ignition. Therefore advise you, unless you are a professional technician modification, or do not scrap it yourself modification.

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What are the imports of car audio brand is better

Ten Outstanding Chinese import brand car audio

1, Sweden DLS
2, Alpine ALPINE Japan
3, Japan PIONEER Pioneer
4, the Danish Dynaudio Tanner
5, France FOCAL fresh waves
6, Israel Morel Morel
7, Germany Blaupunkt Blaupunkt
8, the United States JBL
9, Germany SiemensVDO Siemens VDO
10, United States ROCKFORDFOSGATE to fu

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modified car stereo careful not played Fire

In recent years, car audio conversion wind in Sichuan in the automotive enthusiast quietly became popular, free time, many riders

together and began to “sun” from the sound. However, the reporter recently received a lot of owners are hot, they reflect sound in

converted stores were converted, the battery life was cut short, while open sound, the car could not beat the fire. In addition, the

car s wires are intertwined like a spider web, they are worried that a long time, this will not cause short circuit? For riders of the

problem, experts gave answers.

Case 1

Songs ten minutes half power cart

Some time ago, Mr. Zhang spent three thousand Neijiang ocean, for their car to a sound conversion. One day, he pick up a friend, to

the appointed place, the friends not to, so he stalled and open sound, enjoy the music played. 10 minutes later, a friend arrived at

the agreed location, but Mr. Zhang, but also how to beat the fire, and a look at battery indicator, has come to the red line position.

No way, Mr. Zhang had with friends, will push the car to an automotive factory repair of the town.

Expert Answers: Mr. Zhang encountered this situation is due to the modified acoustic power is too large, no modification be properly

handled shop caused. Owners should be carefully selected in the modified sound, choose a car that matches the car amplifier and

speakers for modification. Meanwhile, in the conversion process, teachers should also be modified according to the actual situation of

car audio and in the appropriate location to install some of the capacitor to ensure the continuous supply of electricity.

Meanwhile, the owner of the use of sound, the flame should be avoided listening to music, or the sound was very large. This will not

only runs down quickly, will also affect the audio performance and service life.

Case 2

Blame the car smoke wire

Two years ago, she had got to his car to do the audio conversion. A few days ago, her way to work, opened the amplifier and sound,

and the sound was very large. A few minutes later, the very fact that smelled a pungent smell, she turned to look, the co-pilot s seat

at the back, emerging a plume of smoke, she hastened to pull over the car and turn off the power, smoke slowly spread. The very

fact drove the car to the repair shop, were examined. It turned out that the smoke is due to the wires connected with the car audio

wiring short circuit occurred.

Expert Answers: formal conversion shop, in the modified sound process, generally attach great importance to install the part. Because

in the conversion process to change the line of vehicles, so the audio signal and power cables should be equitable distribution,

especially the audio signal line wiring, trip computer unit and to leave the amplifier power cord at least 20cm or so. If the wiring is too

close, the audio signal line will be subject to interference, resulting noise, impact sound. Meanwhile, in the process of installing the line,

but also with power, insurance, to ensure safe use of electricity. Power cord must also be insulated for protection against wire after

aging, short-circuit line with the original car, affecting driving safety.

The key is to match the audio conversion tips

Before conversion, the owner should consider focusing on improving the acoustics of which, we should consider their own car space,

can not be blind to see the kind of car modification shop. The choice of brand, to understand all aspects of brand awareness, quality,

price and so on. But clearly their favorite style of music, choose a good source host, and with the right speaker. Modification, the

modification should choose a professional shop, taking care to install the other sectors. In the audio conversion is completed, teachers

should be required to modify their debugging, until the best results. Noise process is also important to do, because the vehicle at high

speeds, wind noise, tire noise and mechanical noise will interfere with the audio system.

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Do not move the original car audio conversion circuit

Put a new car, but also run well, many owners try to figure out the beginning “enjoy” the problem, then converted a lot of car audio

has become the owner, in particular, the choice of the Friends of audio fever. Professionals to remind owners: car audio since the use

of special environment, in fact, not tear down the original car audio products like the new ones, but to Britain at the end of repeated

debugging.

■ Myth: a series of packages with a single brand

Auto Accessories Co., Xi an, a sound department of skilled personnel into the teacher told reporters, in fact modified car stereo is a

very professional thing, far from being able to put a good product line. This process, in general, the owner can do is report the results

of skilled workers want, and then by the result of skilled personnel in accordance with the requirements to configure and price

products, this step is very professional. Many people think that the host, speakers and other accessories should be adopted by a

company produced a series of packages is probably a brand of tools, but that is a misunderstanding, because in the international real

thing produced professional car audio company, in fact, not because of its production package and a series of well-known, but rather

it is something of a highly professional recognized by the industry, like the Pioneer brand, it is better than the force of the speaker, Bo

Shida amplifier power than professional.

■ adhering to: audio structure of three points

Tool selection is still a semi-finished, its placement was very nervous, very good Andhra less affect the final result. Placement of

personnel necessary for Britain at the end of professional training, placement of rich experience. The other, placed in sealed, clean,

spacious workshop process conducted strictly in accordance with homework.

Placement of personnel first on the circuit it is understood that the value panel plans to deal with differences between models,

condition-care programs have differences. As a result of car audio will have a three-dimensional feel; hole and then is about the

location of front and rear speakers must be selected, only the selected location, the results will be harmonious, three-dimensional.

Necessary to note that before the placement of the instrument panel sound is irregular and unscientific, it is not only not achieve the

desired results, but also damage to the speakers to play the role.

In general, the sound discretion in structure to several points: First, the treble to tenor as close as possible, if left too far, will show off

frequency of the phenomenon of tension. Secondly, if the interior space, the best three-way Needless to plan. Third, the location of

the point of the treble sound resolution and depth of field position, to test the differences in more locations. Placed in the strict

attention, do not smash the original car circuit, or when the cost of the car on sale in the secondary to be affected. If the original

car s noise level due to good results, in order to guarantee sound results, it is best to install car sound damping panels.

■ moment: is debugging

After placement also does not mean that the modification is also good. Into the teacher said, the next key moment debugging, but

this work can only have excellent hearing and by the end of Britain to complete the training of technicians, which is why the change

to the professional audio car audio shop the best reasons. Because space is cramped car, slightly wrong, stereo sounds will be very

uncomfortable. Even the famous sound, if debugging is not in place, the same will not have a good voice. So, good sound is out of

tune, good skilled personnel in accordance with the internal characteristics of the car for debugging, so that all parts inside the car to

hear the real voices are balanced. The other, placed just after the beginning of the debug debugging, the owner of the use of two

weeks to a month, the best skilled personnel in accordance with the user make sense to make another fine-tuning, espoused the

best audio results. This series of articles written by the reporter Jiang Xiaohong

Do not use pirated audition

Electronic Technology Co., Ltd. Guangdong good staff to help Li told reporters, if the owner is very ear, “cunning”, then choose the

car stereo on the CD instead of DVD, because it s the best sound quality. And as far as possible in terms wire transfer using

professional wiring, the best transmission wiring is made of silver, but expensive, so many high-quality transmission using pure oxygen-

free copper wiring for conductors.

Li said that, of course, necessary to debug sound professional hearing, but in general the owners can make use of some small tips to

identify the sound of sound: to find a sound with strong low-frequency irrigation, such as drums, bass stretching numbers, etc., will be

at maximum volume , and then step by step reduced the volume of any circumstances, be able to hear the clean, low bass sound is

excellent. Other, a good sound with a panoramic view of the sound field reproduction ability, can music in front of you reproduced a

large area, so you can listen in the car all parts to see if they can make you satisfied with the results of hearing . Also contains high-

quality sound can be heard inside the car in the true voice of balance, with a clear distinction between the left and right channels to

the plate, respectively, left and right channels should be able to listen to hear the full two-channel audio sent to , and the differences

can be heard on the balance of the seat the same music. Necessary to note that an audition is best used when the disc is a

professional test Yindie, we must eliminate the use of pirated CDs, pirated CDs because the irrigation system is better than force or

source in the thick of the environment will be amplified distortion, manifested the true sound the environment.

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how to select the type of bass cabinet

Now popular in China bass cabinet, usually sealed or vented bass box, but to choose what type of box, we can from their low-

frequency response, etc. to choose.

A, 30Hz low-frequency response over the following

In the lower frequency bands, in particular, 30Hz or less, closed the box and sealed rear chamber with a general formula (single

inverted-phase) for the control unit an advantage, this two kinds of box in the band can afford more power. Reverse-phase inverter

with dual speakers and speakers formula bass in this band is likely to cause damage, because when the signal is lower than the vented

box tuning frequency, the control work for the bass significantly reduced, there is no equivalent in the box, At this time, ultra-low

frequency bass music signal is easy to make wide range of movement of its design range. Vented box in this band relative to the

speaker or sealed airtight chamber with a formula box is another significant problem is the distortion is very large. Of course, as many

musical instruments and music signals do not reach 30Hz, so the system design is generally not too concerned about it.

Closed box and sealed rear chamber with a general formula of the box is another advantage lies in its low-frequency attenuation per

octave slope of 12dB, while the reverse design of the speaker relative to the attenuation slope per octave 18-24dB Therefore, sealed

cabinet design with a lower-3dB frequency points, which also shows their low dive deeper.

Two ,30-80Hz response

The low-frequency band music in many more low-frequency information of the frequency of the low-frequency performance is very

important. Many music lovers, fans of this band requires much higher than the ultra-low frequency. In the case of moderate volume,

various types of box has better bass performance, phase inversion type speaker and the speaker than the closed box with a general

formula has low distortion, but this difference more obvious.

In the case of higher power, this situation is completely different. Dual inverting Band Pass Speaker of control because it is inverted

relative to the cone moves, resulting in a minimum of distortion and higher power handling. Phase inversion type speaker and the rear

chamber sealed with a general formula speakers also have a higher frequency output without distortion. The closed cabinet, there will

be greater in the high-power distortion occurs because the high-power voice coil generally lead to a significant nonlinear distortion

caused by vibration significantly. So do not think that phase inversion type speaker cabinet with closed higher than the distortion,

which depends on its frequency and power segment size.

Third, the transient response

System transient response is the bass tracks in the musical elements of the rapid response capabilities. In professional terms, the

general use of low-frequency “loose” or “tight” to describe, many people might think that low-frequency and frequency-dependent

elastic is a generic term, but in fact it is a time associated with the jargon. In the music signal, such as drum sounds, bass sounds can

be tested since the system s bass transient response. Good transient response, low-frequency bass replay should be very clear, strong

and powerful; and poor transient response of the low-frequency bass replay vague, loose, this is because the system can not control

the cone formed by the action.

Optimize the design of closed bass system has the best transient response, this is because the speaker closed the air as spring-like in

its internal cone control the vibration, but the distortion at high power due to its transient increase will affect the response. Phase

inversion type speaker is slightly smaller than the transient response of closed speaker, but if the box was a high Q value of design,

such as more than 1.0 can be a very good transient response, which is often used in car audio conversion.

Band Pass Speaker restored narrow-band, there will be a good transient response, but if you restore a wide frequency band, will

appear the phenomenon of poor transient response.

Fourth, the efficiency

Here the efficiency of the system is the bass sound of the electric power is converted to energy capacity. In general, most efficient

dual inverted-phase band-pass speaker, to restore a narrow band of sound energy at a high output. The gas-tight chamber with a

general formula after speaker and vented speaker has a higher sound pressure output, and closed the least efficient speakers.

Fifth, the low-frequency

Low to sound real and natural, the system should have good low-frequency reproduction. This is because music signals are generally a

combination of many octave signal, so in order to restore ultra-precise low-frequency sounds, the low frequency sounds the same to

restore accurate. In car audio, due to space and thus will not have a greater impact on the first unit to replay the sound field of

outstanding low-frequency, which requires low-frequency speaker in a very good low frequency performance requirements in order to

achieve high fidelity.

Closed and vented speaker speaker unit is directly due to listening to the sound radiation range, so you can get the most flat low-

frequency response; Band Pass speakers, especially with a general formula to restore a narrow frequency band is due to the 75-80Hz

there attenuation, low-frequency part of the reduction will be significantly degraded.

From the above analysis we can see that the form of different types of systems each have their own advantages and disadvantages.

Analysis of different types can help you make the right choice, of course, in the analysis process will consider the following factors: the

share in the automotive area; the effect of low frequency performance (sound pressure type, sound type, etc.); power amplifier; also

a customer s budget. Many expert-level car audio master using the following weighted modification method, 30% of the low-

frequency extension of the frequency response of 25%, 25% of the bandwidth, 20% of box volume, and then finding the most

suitable for the ideal car stereo with the bass the system.

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