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How to improve sound quality in car | Adding tweeters to car

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  • OVERALL DIFFICULTY INDEX: 3/10
  • IF YOU HAVE NO TOOLS, YOU PAY $ 15 TO GET THEM FOR THIS JOB (EXCEPT THE MULTIMETER)
  • IF YOU HAVE NO EXPERIENCE YOU SPEND 3 HOURS TO CARRY OUT THIS JOB
  • NO SAFETY ISSUES​
BEFORE YOU START
  • Always buy tweeter kits that include filters (crossovers). Filters will let the high frequencies only pass to the tweeter, which is the purpose of adding tweeters, and which results in a significant improvement of the sound quality in your car at the less possibe cost.
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.

Connecting the wires of the car tweeter speaker

The below pictorial is shown on a 2019 Citroën C3, yet the works are mucj similar or identical on any car.
If you elect to install the tweeters on the dashboard, click on the below link to see how you can pull out the car radio.
If you decide to fix them on the doors, click on the other link for the removal of the door panel.
Having removed the car door panel, find the wires that connect to the existing speaker.
Without cutting the wires, use a wire stripper to strip a small part of the wires insulators.
Use a multimeter to identify the wires, click below for more details.
Simply connect the wires to the input side of the tweeters filter to the bare part of the car door speaker wires.
Connect the tweeter filter wire with a white stripe (band) to the wire that gave the "negative" reading and the other one to the wire which returned a "positive" reading with the multimeter switched to the DC Voltage (mV) scale.
Cover the wires with tape.

Fixing the tweeter to the car door panel or dashboard

The tweeter will have to be installed somewhere to the front of the car door, near the dashboard.
Yet, you need to see where to fix the tweeter crossover (filter) inside the door panel in a manner that:
  • There's enough space for it, this is usually available within the armrest mould of the door panel.
  • It doesn't interfere with the door handle mechanism or cable
  • It can be solidly attached with a cable tie
If you're fixing the tweeters to the dashboard, click on the below link to see how to run wires behind the car dash.
Refit the car door panel with the tweeter speaker still loose, then peel up the tweeter self-adhering tape protective film, and push it well with force to the car door panel at the exact place where you want to fix it.
Turn on the music and enjoy the sound of your car radio!
Make sure however to go to the car radio settings and to adjust the audio output by selecting a pre-defined music setting or by manually adjusting the bass to "+3" (one third of the scale) and the trebble to "+6" (more than two thirds of the scale, but not the maximum value).
If you chose a pre-defined setting, then the "pop-rock" and "techno" ambiances will usually return the best results after installing car tweeters.

See also our other pictorials for car speaker installation