【UP W8MB-S4 RHD | 20cm Trade-in Subwoofer for Right-Hand-Drive Vehicles】

You want a bit more low-end thickness and depth in the sound from your factory audio. But you don’t want a sound where only the bass stands out. That’s exactly what UP W8MB-S4 RHD is for.

Paired with a 20cm woofer unit, it uses a lightweight yet rigid paper-cone diaphragm and a powerful magnetic circuit driven by a neodymium magnet. This subwoofer isn’t aimed solely at adding more bass quantity—it’s designed for fast, responsive reproduction with attention to the sound’s attack and even its subtle nuances.

The playback frequency response is 25Hz to 250Hz. Because it focuses on the subwoofer band, it’s easier to divide roles with the front speakers. It also helps add natural thickness to the overall music without getting in the way of vocals or melodies. Even with your usual songs, you’ll find it easier to sense the punch of the kick drum and the presence of the bassline, and the sound will start to feel more spacious.

Although it’s a trade-in type for right-hand-drive vehicles, the final result isn’t determined just by swapping the product. It’s important to check how it combines with the factory audio, the condition of the vehicle side, and how it connects with the front speakers, then adjust the sound balance as needed.

If you want to increase the bass but don’t want flashy sound, I would first put a subwoofer like this on your shortlist and confirm how it matches your current system. Since the guidance varies depending on the vehicle model and the factory audio specifications, let’s decide the direction together while checking your vehicle information.

Main Specifications / Specs

【Basic Information】
Product name: UP W8MB-S4 RHD
Type: 20cm trade-in subwoofer
Intended use: For right-hand-drive vehicles

【Unit / Structure】
Diaphragm: Paper cone
Magnetic circuit: Neodymium magnet

【Playback Performance】
Playback frequency response: 25Hz to 250Hz

Shop owner Mizoguchi (Komizo)