The core activity of Defekt GmbH includes:
* Repairs and modifications of analog and digital synthesizers, electronics and microprocessor-based devices
* Development and modification of electronic circuits, particularly for audio applications and computer-controlled units
* Sales of music electronics, particularly Doepfer products such as analog modular synthesizers and MIDI-analog sequencers
* Restoration and repair of defective devices, particularly synthesizers, amplifiers, DJ turntables and effect devices.