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Retrofit speakers for many BMW and Mini models at an affordable price? And this in a very good quality? The SIGNUM SXB loudspeaker systems prove that this does not have to be a contradiction. If the original factory sound system simply sounds too thin, these models are spot on. Brilliant highs, balanced mids and powerful bass are the rewarding results.


Everyone knows that it is not easy to retrofit good loudspeakers in BMW vehicles. For this reason, ESX has developed all components in such a way that this "hurdle" is easier to take. Through consistent plug + play implementation, it is quite easy to replace the original speakers without any problems. All connectors, screws and the speakers themselves fit perfectly.

SXB8.3C € 449,00*

3-Way Component System


10 cm (4”) 2-Way Component System

Power Rating 60/120 Watts RMS/max.

Impedance 4 Ohms, Frequency Range 75 - 22.0000 Hz

100 mm Midrange with Paper Cone

N42 Neodymium Magnet Driver

2-Way Crossover incl. Cable

25 mm Silk Dome Neodymium Tweeter

Car-specific Connectors

Midrange: Installation Depth 30 mm, Installation Opening 98 mm

Tweeter: Installation Depth 10 mm, Installation Opening 41 mm



20 cm (8”) Subwoofer (Pair)

Power Rating 100/200 Watts RMS/max.

Impedance 4 Ohms, Frequency Range 30 - 300 Hz

216 mm Paper Cone

38,5 mm Voice Coil, Nomex Spider

N38 Neodymium Magnet Driver

Car-specific Connector

Installation Depth: 51 mm, Installation Opening: 180 mm


Fits into:

Many BMW E/F/G and MINI R/F Models

Refer to Compatibility List


Owner's Manual


Owner's Manual


* Manufacturer's suggested retail price, changes and mistakes reserved