【B-100X HP | High-Pass Filter for 10cm Mids】

This is a high-pass filter designed to cut the ultra-low frequencies that a 10cm midrange mounted in the door tends to struggle with, helping reduce sound muddiness and unwanted vibrations.

If you try to reproduce lower notes and the entire door starts to vibrate, the vocals and instrument sounds may become blurred, and you may also feel fatigued when listening at higher volumes. By combining B-100X HP, you can organize the frequency range handled by the 10cm mids and aim for a clearer, easier-to-listen sound.

This isn’t a type that dramatically boosts bass. Instead, when you listen to your usual music, it’s a part that naturally sharpens vocal contours and improves the clarity of the midrange. Since it can also be expected to suppress unwanted vibrations in the door, it’s suitable for cases where you want better cohesion in the sound—especially when used together with speaker upgrades or deadening.

Reuse with OEM speakers is also possible, but the optimal combination varies depending on the vehicle model and the configuration of the factory audio system. Even with the same filter, the final result can differ depending on where it’s installed and how you judge compatibility with the speakers and amplifier.

If it were me, I’d decide whether to use it based on your current sound issues and speaker configuration, rather than simply adding it as a standalone item. If you find the 10cm mids a bit muddy, are concerned about door vibrations, or want to improve the sound while making use of your OEM speakers, feel free to consult with us.

■ Main Specifications / Specs

【General Information】
Product name: B-100X HP
Type: High-pass filter for 10cm mids

【Compatibility / Applications】
Target: 10cm midrange units mounted in the door
Use: Cut ultra-low frequencies, suppress unwanted vibrations, enhance sound clarity
Reuse with OEM speakers: Possible