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I've heard the question asked many times before, 'Do I really need a crossover?' Without wasting any time I quickly answer, 'Yes you do'. Whether it's a passive crossover or an active crossover, your car audio system will never sound good without a crossover. I want to make myself very clear here, so before you get confused let's talk about what a car audio crossover is and why you need one.

A crossover is a filtering device which limits the frequencies that reach a speaker. It splits a music signal into separate frequency ranges and sends them to speakers that are designed to best reproduce each frequency range. For instance, only high frequencies would be sent to your tweeters, midrange to your mid range speakers, and lows to your subwoofer.

The passive crossover is very common. It's basically a capacitor or coil installed on the speaker leads between amplifier and speaker that stops certain frequencies from reaching a speaker. It's relatively inexpensive and easy to install.

But for your car stereo system to perform better and be efficient, you need an active crossover, also referred to as an electronic crossover. It is installed between your head unit or equalizer and your amplifiers. Your electronic crossover sends the proper frequency ranges to each amplifier. Some people run three separate amps: one for bass, one for mids and the other for highs.

Active crossovers are almost infinitely adjustable. You can vary the crossover points and adjust the level of separate speakers to achieve the best overall sound in your vehicle.

If you're serious about sound you must have a car audio crossover. Otherwise your system will sound terrible. Oh what a mess it will be when your subwoofer and mid-range speakers duplicate many of the same frequencies! How about when your mid-range speaker attempts to put out high notes that your tweeters are supposed to handle. Can you bear such grief? I can't.

And this is just the beginning of your sorrow and pain. Since low frequencies are being sent to your tweeters there will be distortion. As a result of this distortion your tweeters will be destroyed. Loud bass will eventually destroy your mid-range speakers as well. Now you've got to start from scratch and buy a new set of speakers, all because you started on the wrong footing.

Roger Charles is a successful author and publisher of Car Stereos Guide A resource for information and tips on buying car stereos and car audio products online.

Car DVD choose strategy: right is the best

Car  DVDchoose strategy: right is the best

Different owners on the car's requests for a DVD machine is different from the appearance of some attention, some focus on sound quality, some focus on functionality, some focus on cost, so buy DVD machines should be based on their needs to do in the same grade of product comprehensive comparison, a balance which most suited to their specific products.

1. Tailor-made: first step in choosing car DVD machine to determine the suitability of the machine the size of your car.  from the panel size, the routine has 1DIN and 2DIN two categories, generally more commonly used small vehicles for the 1DIN size products, occupy a standard CASE. 2DIN panel size are relatively large, many products look more luxurious, are used for medium-sized business,  2DIN size of equipment required on vehicles Gaizao Huan some. Proposed a general user tried to use small vehicles 1DIN standard size equipment, so installation and replacement of the existing deck is more convenient. Single-spindle DVD sub-screen and without screen, with two categories, single-spindle of DVD because of small size, so the integration of the modules requires high production costs will naturally increase, or with the screen if the screen must be made telescopic ( Built-in), so prices naturally come up. Some owners also choose a single-spindle non-screen DVD and a single tablet of the telescopic display, this first requires the installation space is a two-spindle, but the two single-spindle machines with relatively heat with a single spindle for the screen larger, so it is recommended to use a single tablet with the screen better.

Now come with dual-screen DVD spindle, dual spindle function space can be more natural.
2. Targeted: the second step according to their budget and needs, determine the structure and grade of DVD machines. Double Din Car DVD player platter for its structural properties, multi-plate divided. Multi-disc DVD machine there are front and multi-disk player with "backpack" of the post-Multi disk player. Ordinary single platter DVD machine structure is simple and relatively cheap prices for middle and low car. The benefits of multi-disk player is convenient for CDs, but due to the host disc DVD box and between the need for cable, there will be some loss of signal and the interference of the car will have some effect, of course, high-end for discs opportunity to use digital processing at all costs, prices have soared. In fact, our general car owners, not a manual for disc trouble, and can save a thousand dollars of the cost, affordable option is a single disc. Have installed the DVD in the sun visor pocket, more stylish, but also to facilitate manual changer.

3. Performance and function: The third step is to weigh the different grades of product performance and functionality. If you are music fans and like to hear some big dynamic sound music, DVD machine that can look at the output of features and sound quality. Car DVD machine output power related to the dynamic performance of musical ability, the current DVDs nominal average output power per channel are between 30 ~ 55W for 4-channel output can drive an ordinary loudspeaker. Car DVD itself does not contain some high-end amplifier, car amplifier requires external dedicated work, in general, the performance of external professional power amplifier is superior to the built-in DVD machine power amplifier module, and more powerful. The same brand of car amplifier valuable, so is fever with type configuration, have a good effect is necessary to update the car stereo and line. If the owner of the ear is not particularly special picky, do not recommend that burn up!

4. Car DVD machine panel and with the car: If you are concerned about the DVD machine's "face", as one of the car's major feature, it should focus weigh DVD machine panel. DVD machine panel design not only reflects the degree of luxury products related to operability. DVD machines that display the most conspicuous place, DVD has used monochrome LCD screen can only display basic information. In the high-end DVD machines are used or VFD screen TFT color LCD, etc.. VFD screen with high brightness, the advantages of bright color, with the dynamic display design is widely used in a variety of audio and video products. The more advanced car audio and video use in TFT LCD. Because it is based on dot-matrix display, so display rich content without restriction. But DVD machine panel is not more light the better, although the relatively high brightness of the display looks luxurious, but at night driving easier on the eyes of people affected. TFT screen you can adjust the brightness according to individual needs. DVD  panel backlight design related to products in a dark environment, convenience of operation, excellent products are all commonly used buttons have backlight, but even the buttons are easy to look at functional tip text.

5. Auxiliary parameters: in addition to appearance, DVD machine is more user some basic properties of interest. Overhead Car DVD player functions and features a lot of information on the product description is also more information provided, but there are several parameters which compare the key note of this when we buy: shock resistance, anti-jamming, DVD compatible disc format, the screen clarity and so on.

About the Author

Angelina ,A writer for car DVD,Also has a shop for Parking sensor,Sunvisor Monitor.

How can i test a car audio amplifier without installing it? and wheres the best place to buy a sub and box?

ive had it sitting in the garage for a couple years now..

I don't know about testing it but u can go to any major electronics store (best buy) and they can help u out. I would also get a sub and box there too.

Audio gadget missing after car wash
Auto wash operator offers RM100 as goodwill Wednesday, July 14th, 2010 08:29:00 BRAD of Subang Jaya believes that one of his car audio gadgets went missing during the time his car was being washed last week. "On July 9, I sent my car to the nearby Maju Bersih Car Wash for snow wash and vacuuming, something I have done regularly there," he says, adding that his car's audio system comprises two ...

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