If the sound quality and volume do not improve noticeably, this is usually due to incorrectly installed speakers (acoustic short circuit, incorrect installation position, etc.) or the audio source (amplifier / OEM radio / head unit). In various modern vehicles, by means of an integrated DSP preset, the audio signal is influenced. For the original speakers, difficult to reproduce frequencies are lowered or completely filtered out. If the original loudspeaker is now replaced by an ETON loudspeaker, there is still no full, linear input signal at the loudspeaker. Therefore, hardly any improvement is perceived. An intermediate DSP or DSP amplifier can remedy this. Please contact one of our ETON dealers for this.