【BMW Dedicated 2-Way Trade-In System UPGRADE B-100T｜Upgrade to Sound with Natural, Spacious Spread by Replacing OEM Speakers】

I want to make my BMW’s factory audio a bit easier to listen to. I’d like clearer vocal and instrument sounds, but I’m not considering a full-scale system.

If you’re looking for something like that, the BMW Dedicated 2-Way Trade-In System UPGRADE B-100T is a great option to consider.

This BMW speaker system supports installation on the door trim side for models such as E82, E88, E90, E91, and E84. By replacing the factory speakers, you can more easily feel improvements in the definition of sound and the expansion of the high frequencies. The wiring uses a plug-and-play coupler-on method that connects to the OEM connector, making it a point of appeal for improving sound quality without drastically changing the feel inside the cabin.

The tweeter uses a 25mm silk dome diaphragm and a neodymium magnet. It’s designed so that the high frequencies don’t feel harsh, aiming instead for a natural sense of soundstage spread. For the midrange, a 100mm paper cone and ferrite magnet are combined, reproducing the mid to mid-low frequencies clearly for music you listen to every day—such as vocals, guitars, and pianos.

When replacing BMW’s factory speakers, not only the speaker units themselves, but also the mounting condition on the door trim side and compatibility with the existing system affect the final result. Even with the same product, the overall finish can vary depending on how well it seats during installation and how the wiring is handled. If I were doing it, I would confirm the vehicle specifications first, then organize and install only the necessary work.

Even if a vehicle model is listed as compatible, depending on the model year or specification changes, some machining may be required during installation. Before purchase or installation work, we’ll guide you to a practical, no-impossible-constraints setup while confirming the vehicle model, chassis type, model year, and more. If you want to enjoy BMW sound a little more comfortably, please tell me about your current OEM system and how you listen. Let’s think together about the best direction.

Main Specifications / Specs

【Basic Information】
Product name: UPGRADE B-100T
Type: BMW Dedicated 2-Way Trade-In System Speakers
Compatible mounting: Supports installation on the door trim side, such as E82 / E88 / E90 / E91 / E84

【Tweeter】
Diaphragm: 25mm silk dome
Magnet circuit: Neodymium magnet

【Midrange】
Size: 100mm
Diaphragm: Paper cone
Magnet circuit: Ferrite magnet
Mounting dimension: 35mm

【Performance】
Frequency response: 100–22kHz
Sensitivity: 88dB / 1m
Impedance: 4Ω
Maximum input: 100W
Lowest resonant frequency: 87Hz

【Connection】
Wiring: OEM coupler-on
Included items: Tweeter-dedicated high-pass filter

【Optional Items (Sold Separately)】
High-pass filter for 10cm midrange
Product name: UG B-100X HP
Contents: 1 pair

※ Even with compatible vehicle models, some machining may be required during installation due to vehicle specification changes, etc. Please confirm the vehicle specifications and mounting conditions before installing.

Shop owner 　 Komizo