In my opinion, the correct enclosure is vital in getting the most out of your system. This is because the enclosure determines how your sub will react with the given airspace, tuning, and power. For example, a sub in a sealed enclosure will sound very different than one in a ported enclosure. Ported boxes are easy to identify because of the port opening.

A combination of port area (length x height) and port length work together to create the tuning frequency. The tuning frequency is denoted by hertz (hz), usually in the 20-70hz range when speaking of sub frequencies. Sub frequencies are also why subwoofers are called “subwoofers” and not simply “woofers” which refer to midrange frequencies. A combination of size and tuning determines the output of a system more than the power or subwoofer itself. You could have a high end subwoofer like a DD 9515, but in the incorrect box, it could be outdone by a lower end sub in an optimized box.

The key to making the best box possible is simple: test, test, test. There is no one best design because every car is different and will react differently with different boxes. Through lots of testing, I found that my car likes large boxes and a 40hz tuning. I’ve gone up against many people with more than twice the cone area (double the amount of subs) and have come out on top, even though I’ve got half the cone area in a very restricted sedan rather than the open cabin of an SUV. During these competitions, your score is measured in decibels at your highest frequency.

Therefore, it is extremely important to tune your box to reflect your highest outputting frequency. Right now, my box is tuned at 40hz and it also happens to hit its peak output at 40hz. That may or may not be the case for anybody else because as I said before, every car is different. Also, don’t forget to take your subwoofer into consideration. Most of the time, you will usually peak a few hz above tuning. E.g. a tuning of 32hz may result in a peak of 40hz, depending on the car of course. In essence, tuning at a certain frequency allows you to control your output and determine what note you want to play the loudest, which is important when taking your car into consideration. Hatchbacks generally hit their highest score at higher frequencies (50-70hz) and SUVs generally hit their highest score at a lower note (40-50hz), while my sedan likes lower notes in the 40hz range the best.

Once you figure out what note your car likes, you can then start optimizing your box by making some small changes. Generally, slightly larger boxes with lower tunings perform best for cars that like lower notes. Slightly smaller boxes with higher tunings tend to complement cars that like higher tunings. For music and daily driving, tunings between 30-40hz are generally accepted as a fair tradeoff between sound quality and loudness.

Visit http://www.IsYouGeekedUp.com to learn more about car audio

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With all the technology available to us, there’s no excuse for getting the family lost in an unfamiliar place or stuck in hours of traffic on holidays. GPS is a great devise for in-car use and it’s just as useful when on foot plus it’s a great way to get around a foreign city too. With GPS Rental services this device became even more available and useful. Drivers can find their way through city streets; long reserve trekkers and hikers use the technology to navigate unfamiliar terrain. GPS devices are even more helpful for planning a trip, whether it’s a cross-country trek or a hopscotch tour of your routine stops.

But GPS not only gets you from point A to point B with minimum hassle, it also makes your holiday come alive; with ways to plan your itinerary, track down the best restaurants, and make your holiday more enjoyable.

Here’s a few handy GPS travel tips to help you get the most out of the holiday and avoid the travel woes.

GPS TIPS

1. If you intend to rely on your GPS unit, take time to learn it before needing it. Get the manual out, work with setting waypoints and determining position. This will save you time on the road and prevent you from loading incorrect information or deleting valuable information by mistake.

2. Ensure that you install the maps prior to travel. This will enable you to browse and test the maps prior to embarking on your trip. Make sure you are familiar with the route calculation settings of your device.

3. Power is an issue. All GPS models will need to be recharged. Make sure you have enough batteries for the trip or pack a universal adapter in your luggage. Battery life of GPS devices vary, so it is important to have a cigarette lighter charger as you do not want to run out of juice when you are on the road.

4. Avoid leaving GPS device mounted on the windshield in a hot car for long periods of time. It is also a good way to prevent the device from being stolen, since even leaving the window screen mount in view is an advertisement that a GPS device may be in the car.

5. Most car navigation systems include an extensive POI database including restaurants along the interstate. Choose the cuisine you want and your GPS will display a list of results by proximity. Filter out only those along your route and your forward seeking food radar will update faster.

6. Some GPS devices also contain useful travel advice which can be very helpful if you are unfamiliar with road rules in other countries. For example, some device menus contain guides for multiple countries and cover local road rules, public holidays, accommodation advice and more.

7. When navigating to a place, it may be easier to search for a place by name rather than address. For example if you wish to visit the British Museum in London you can find it listed under museums as a point of interest and be able to navigate there without knowing the exact address.

8. And most importantly, make sure you dust off your GPS-knowledge and get the upper hand on your pending trip before you embark. Just be smart and make good use of your GPS.

About the Author:

GPSPlanet.com – GPS rental services, available all around the world. Rent a GPS today!

Article Source: ArticlesBase.com – GPS Travel Tips

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How do i install a headrest dvd player???……..?

Ok so I bought this headrest dvd player from ebay and the sounds is not working. Everything (video) except the sound is working. Can you please tell me what is wrong with it. And by the way i’m installing it on a Chevy Avalanche 2008.

there should be speaker wires running from the dvd player out of the headrest, youve got to tie those wires into your factory speakers to get sound unless youve got on with built in speakers, but those are rare

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