09/24/2026
The ISM 400.2DSP is a powerful 2-channel subwoofer amplifier module with an integrated 1-channel DSP – making it a compact high-performance innovation for modern subwoofer upgrades. It‘s focused on targeted subwoofer retrofits in vehicles with factory sound systems – whenever an additional subwoofer needs to be integrated cleanly and reliably without rebuilding the entire system. Therefore it’s especially convenient that it allows our “ISM-ready” passive 2 x 2 Ω enclosure subwoofers to be converted into an active solution by simply replacing the connection terminal.
More information:
https://www.audiotec-fischer.de/en/helix/amplifiers/impact/ism-400-2dsp