Match UP S4MB-CTR – Upgrade center speaker for Mercedes vehicles
The UP S4MB-CTR is the dashboard center speaker of Audiotec Fischer’s MATCH UPGRADE system for Mercedes. It replaces the factory center speaker in the C-Class (205), E-Class (238/213), GLC (253) and S-Class (W222), improving the sound stage for both the driver and the front passenger.
Its tonal character is matched to the other MATCH UPGRADE speakers so that the whole system produces a homogeneous sound image with more resolution, precision and dynamics than the OEM setup. A separate voice coil keeps the automatic emergency call (SOS) function of Mercedes vehicles working. The speaker reaches its full potential with an Audiotec Fischer DSP amplifier offering center management.
Key Features
- Center channel upgrade: replaces the factory Mercedes center speaker.
- Improved sound staging: for driver and front passenger.
- Tonally matched: to the other MATCH UPGRADE speakers for a homogeneous sound image.
- SOS emergency call support: separate voice coil maintains the automatic emergency call function.
- Impedance: specified as 2 x 4 Ω.
- Higher power handling: 60 W RMS / 120 W max.
- Mercedes-specific tuning: sound characteristics optimised for Mercedes vehicles.
- Exclusive basket and car-specific connector: for easy installation.
- Center management: best used with an Audiotec Fischer DSP amplifier with center management.
- System expandable: combinable with other MATCH UPGRADE components.
Drivers & Construction
A single driver with a coated paper cone, a Mercedes-specific basket and a car-specific connector. The impedance is specified as 2 x 4 Ω; one voice coil is dedicated to the emergency call function.
Acoustic Performance
- Power handling: 60 W RMS / 120 W max.
- Impedance: 2 x 4 Ω.
- Sensitivity: 89 dB (1 W / 1 m).
- Frequency response: 90 Hz – 20,000 Hz.
Installation Notes
- Installation diameter: 99 mm (3.90″).
- Installation depth: 35 mm (stated on the page as 1.34″).
- Position: factory center speaker location.
Compatible vehicles as listed by the manufacturer (status May 2019):
- C-Class: Convertible A205 (from 2016), Coupe C205 (from 2015), Sedan W205 (from 2014), T-Model S205 (from 2014)
- E-Class: Convertible A238 (from 2017), Coupe C238 (from 2017), Sedan W213 (from 2016), T-Model S213 (from 2016)
- GLC: SUV X253 (from 2015), SUV Coupe C253 (from 2015)
- S-Class: Sedan W222 (from 2013)
Technical Specifications
| Power RMS / max. | 60 / 120 Watts |
| Frequency response | 90 Hz – 20,000 Hz |
| Impedance | 2 x 4 Ω |
| Efficiency 1 W / 1 m | 89 dB |
| Cone material | Coated paper |
| Outer diameter | – |
| Installation diameter | 99 mm / 3.90″ |
| Installation depth | 35 mm / 1.34″ |
Scope of Delivery
1 x Center speaker MATCH UP S4MB-CTR
1 x Instruction manual
