【One-off D-Pillar Inset Processing｜Car Audio Installation with Natural Sound Flow to the Rear of the Cabin】

You may feel that the audio from the rear seats is weak, that the front and rear sound doesn’t blend well, or that you want to add speakers but don’t want to ruin the appearance.

For those preferences, this is a complete one-off speaker inset installation that embeds the speakers into the D-pillar.

This isn’t just about mounting the speakers. We create the enclosure shape from scratch while checking the vehicle’s interior contours, the speaker size, the installation orientation, and the balance with the existing system. Because the way sound reaches you changes depending on the speaker’s angle and direction, we consider the best position so the sound spreads naturally throughout the cabin.

Connecting Rear Sound Naturally Throughout the Cabin

By adding speakers to the D-pillar, it becomes easier to make up for the lack of information from the rear of the cabin.

Even if sound from only the front speakers doesn’t reach the rear seats well, by adjusting while maintaining balance with the overall system so the front and rear don’t sound disconnected, you can aim for a cohesive sound that fills the entire cabin.

This installation is ideal not only for people who often listen to music from the rear seats, but also for anyone who wants to enjoy music from any seat in the vehicle. However, the effect varies depending on the type of speaker being added and the system configuration—so we will make a proposal after confirming your vehicle and your current audio setup.

Crafted to Match the Vehicle’s Look

With one-off work, it’s important not only how it sounds, but also how well it integrates with the interior.

We fabricate the base and enclosure to match the shape of the D-pillar, and we also align the materials and surface finishing with the vehicle’s overall look and feel. While suppressing any “aftermarket” appearance as much as possible, we aim for a finish that makes the presence of the installed speakers feel truly meaningful.

This processing is characterized by the fact that the installation content changes for each vehicle, including the mounting method and internal structure. Without checking the mounting position and processing range on the actual vehicle, it isn’t possible to plan the same content for the same price.

Why Have LOGON Do the Work

Embedding speakers into the D-pillar isn’t something that is completed by fabrication skill alone.

You also need to think about the entire vehicle, including speaker selection, installation angle, enclosure construction, volume balance with existing speakers, and adjustments using DSP, etc.

At LOGON, we sort out the necessary fabrication details while confirming the vehicle model and interior condition, your current system, the music you typically listen to, and whether you prioritize the front seats or the rear seats.

If you want to “listen clearly even from the rear seats,” “care about the appearance too,” or “want to add speakers but avoid making the sound unnatural,” please consult us while looking at your vehicle once. If it were me, I would first check the actual vehicle and your current system, and then think together about whether the configuration you want actually makes sense.

■ Main Installation Contents

• One-off fabrication of a D-pillar enclosure
• Fabrication and inset processing of the speaker mounting area
• Design of speaker angle and orientation tailored to the vehicle
• Installation considering internal structure and mounting rigidity
• Shape, materials, and surface finishing designed for integration with the interior
• Confirmation of balance with the existing audio system
• Sound field and volume balance adjustments as needed

The installation method varies depending on the speaker size and the vehicle’s interior shape. Since the feasible scope and the final finish require checking the actual vehicle, please tell us first about your current audio configuration and your preferences. Let’s organize the best setup together so you can enjoy listening comfortably throughout the entire cabin.