If you have decided to venture into car audio system upgrading,you’re going to need to know how to install the tweeters. Tweeters are a sort of speakers designed to cover high frequencies that typical speakers can’t reach. They work in conjunction with woofers (woofers cover low-frequency sounds – bass) to deliver a well-balanced sound. Installing them isn’t rocket surgery. It’s a straightforward process.
Typical speakers that work in conjunction with tweeters are called components. They are the best type of speakers when it comes to sound quality. Component systems tend to cost a bit more than their counterparts – coaxial speakers. Coaxials on the other hand combine all the drivers including woofer,tweeter … in one single unit which makes them less expensive and easier to install.
To properly function,you’ll need to install a crossover that redirects sound signals coming from a head unit or amplifier to the most suitable component. Higher frequencies to the tweeters, and lower frequencies to the woofers or to the external sub, if one is used. This results in a far better stereo-imaging and a wider sound stage.
Tweeters can be mounted in different ways such as flush, angled, or surface mounting.Whichever mounting option you decided to go with, make sure your tweeters are above the woofers and mount them so they can broadcast towards your ears for a realistic sound-stage and stereo image.
Standard mounting options
- Surface mounting: The tweeter is mounted on top of the mounting location and held inside a cup secured to a surface with a screw holding the tweeter in place. You might want to consider surface-mount your tweeters if you want to keep you car’s interior unchanged or if you don’t have the depth to accommodate flush mounting. The only downside I can reasonably think of is that surface mounting will leave you with a noticeable installation.
- Flush mounting : It consists of drawing a hole on the dashboard or on the door to accommodate the tweeter. The main advantage of this option lies in its smooth, customized look,since the tweeter sits flush with the interior panel. Nowadays, many manufacturers include angle-mounts which allow the users to slightly adjust tweeter’s broadcasting angle,even when your tweeters are mounted within the panel.
- Bottom mount: the tweeters are mounted usually under an existing grille so you won’t need to make new holes.
Common Tweeter placement
 Sail panel : sail panel is the part situated in the top corner of your door window. Some vehicles come with their factory tweeters mounted right there. If your car came with factory tweeters,bottom mount is your best mounting option.Otherwise,consider flush mounting. |  Dash edges : If your vehicle is already equipped with factory tweeters in the dash, bottom mount is your best option. You won’t need to create new holes, but you might need a bracket to secure the new tweeter. |
 “A” pillar : The “A” pillar is the near vertical support which sits between the front windshield and front door. It’s the best spot to surface mount your tweeter. |  Upper door : It consists of drilling a large hole in the door panel to accommodate the new tweeter. And it makes total sense when your car isn’t equipped with factory tweeters or when factory tweeter location is too tight to work with. |
Whichever method or location you choose,bear in mind that manufacturers recommend that your tweeters should be mounted within 12 inches of the speakers. Otherwise, sound frequencies emitted by both the woofers and tweeters may reach your ears at slightly different times, resulting in waves interference or acoustic phase cancellation.
Tweeters Installation Process
Step #1: Cut The Power Off At The Source
It’s highly advisable that you disconnect the negative (-) terminal from your car’s battery. It’s a crucial step to prevent a possible electrical short circuiting or damage to your car’s electrical components.
Step #2: Gain access to the speakers and tweeters
Each vehicle is different, but gaining access to your speakers as a straightforward process. Locate where the speakers and tweeters are mounted and take them out. For instance, if you’re installing component speakers on your car’s doors, you’ll likely have to remove the panel.
Step #3: Get rid of the old stuff
Once you are in, disconnect all the wires and get a screw driver, speakers and tweeters are usually secured in their mounting location via screws, so use a Phillips-head driver to unscrew the screws holding them.
Step #4: Adding crossovers
Now as you’ve removed your old speakers and tweeters,connect your receiver or external amp power output wire to the crossover. Solder the crossover cable’s input to the main power source. Make sure the polarities (+ and -) are correctly connected.
Step #5: High-frequencies to the tweeter – low frequencies to the woofers
At this stage, all you need to do is connect high frequency wire from the crossover to the tweeter and connect the low frequency wire the woofer.
Step #6: Re-mounting
The only left thing to do is to put both speakers and tweeters in their mounting location ensuring that each component fits securely. However, that’s not always the case. Sometimes you’ll need to drill some holes either on the dash edge or on the door panel to accommodate the new tweeters.
Ensure that the mounting location has access to existing speaker wiring.
As for speakers, you’ll probably have buy some mounting brackets to make them fit on their original enclosures.