Drivers of a BMW G20 or G21 (BMW 3 Series from 2019) often long for better sound quality than the standard audio system offers. There is a great desire for a high-quality sound experience with clear treble, powerful bass and a balanced sound stage. This is exactly where AXTON comes in: With perfectly tuned plug & play sound solutions for BMW vehicles, we offer a simple and effective way to significantly improve the sound experience in the BMW G20/G21.
In this article, we show you why a sound upgrade with AXTON is the ideal solution for you as a discerning BMW driver and which components ensure optimum results.
Why a sound upgrade for the BMW G20?
The factory sound system in many BMW G20 models cannot keep up with the high-quality retrofit solutions from AXTON. Many drivers miss clear highs, precise mids and, above all, powerful bass reproduction. So if you like listening to loud music or want a better sound stage, a professional sound system upgrade is the best choice.
- High-quality workmanship and audio components specially optimized for BMW
- Significantly better sound quality with clear treble, powerful bass and balanced dynamics
- Higher volume without distortion thanks to a powerful amplifier with digital signal processing
- Simple plug & play installation without changes to the vehicle architecture
- 100% retrofittable, perfect for leased vehicles
- Seamless integration into the BMW iDrive system, control via the original radio is retained

1. new front speakers: AXTON ATS-B100C for clear highs and dynamic mids
One of the keys to better sound in the BMW G20 is a high-quality loudspeaker system. The AXTON ATS-B100C 2-way component system replaces the factory speakers in the front area and ensures noticeably better sound quality. The most important features of the ATS-B100C:
- 100 mm midrange driver with CRYSTAX cone, a quartz crystal-coated paper cone for precise and low-distortion mids
- Neodymium magnet system for high efficiency and clear sound
- 25 mm aluminum tweeter for brilliant and detailed highs
- Perfectly tuned to the BMW G20 and G21, a pleasure even without DSP optimization
- Plug & Play installation - original BMW plug, no adjustments required
With these speakers, every style of music - from classical to hip-hop - is reproduced with more dynamics, clarity and precision.

2. powerful bass: AXTON ATS-BSUB2 - Powerful under-seat subwoofer
The BMW G20 3 Series often has weak bass as standard. The AXTON ATS-BSUB2 under-seat subwoofer solves this problem and delivers rich, powerful bass without taking up valuable space in the trunk. These features characterize the ATS-BSUB2:
- 20 cm high-performance subwoofer especially for BMW vehicles
- Direct replacement of the original bass speakers under the seats and ideal for use with the A894DSP thanks to the 2 Ohm voice coil
- Neodymium magnet and reinforced diaphragm for powerful bass without distortion
- Simple plug & play installation - perfect integration into the vehicle
The ATS-BSUB2 significantly improves the bass range, which provides a completely new listening experience, especially for electronic music, hip-hop and rock.

3. new rear speakers: AXTON ATS-B100X for a brilliant rearfill
If you want to be enveloped by the music, you absolutely need a high-quality rear system. The AXTON ATS-B100X 2-way coaxial system replaces the factory speakers in the rear and not only ensures noticeably better sound quality there, but also a uniform sound image in combination with the ATS-B100C front system. The features of the ATS-B100X are similar to those of the Compos, as they are also closely related:
- 100 mm midrange driver with CRYSTAX cone for precise and low-distortion mids
- Neodymium magnet system for high efficiency and clear sound
- 19 mm aluminum tweeter for brilliant and detailed highs
- Perfectly tuned to the BMW G20 and G21, a pleasure even without DSP optimization
- Plug & Play installation - original BMW plug, no adjustments required
These speakers are also ideal for music ranging from classical to hip-hop - with more dynamics, clarity and precision.

4. more power: AXTON A894DSP - 8-channel DSP amplifier for maximum performance
For the AXTON sound upgrade for the BMW G20 to develop its full potential, it needs a powerful amplifier. The AXTON A894DSP is a compact and extremely powerful 8-channel DSP amplifier that integrates perfectly into the existing BMW system thanks to a special connection cable. In addition, we have already installed a ready-made sound setup for the BMW G20 with the AXTON components in the A894DSP control app. Of course, you can also customize the A894DSP with its extensive options to suit your personal preferences. Here are the highlights of the A894DSP:
- Powerful Class-D amplifier with8 channels
- Digital signal processing (DSP)with extensive setting options
- Simple operation via the free AXTON app
- Integrated DSP sound setting for the BMW G20 complete sound system presented here
- Seamless integration into the BMW iDrive system with the ATS-ISO8068 connection cable
With the A894DSP DSP amplifier, you can customize the sound to create a perfectly tuned soundscape.

Conclusion: Why AXTON is the best choice for your BMW G20 sound upgrade
If you want to take the sound experience in your BMW 3 Series G20 to a new level, the AXTON Plug & Play sound system is the perfect solution. The combination of high-quality speakers, powerful subwoofers and intelligent amplifier technology provides a unique listening experience that goes far beyond the standard BMW sound system. The advantages of the AXTON sound upgrade summarized once again:
- High-quality workmanship and sound-optimized components
- Perfect integration into the BMW G20 / G21 system without conversions
- Powerful bass, clear treble and an impressive sound stage
- Simple retrofitting and 100% retrofitting capability thanks to plug & play solutions
- Unbeatable price/performance ratio
Let the sound quality convince you and enjoy your music in a new dimension. Here you will find an overview of the individual components of the AXTON Specific Sound Upgrade for the BMW G20 / G21:
BTL 8.0 setup (one subwoofer per channel)
ATS-B100C, ATS-B100X, ATS-BSUB2, ATS-ISO8068, A894DSP
BTL 4.2 setup (two channels bridged per subwoofer)