The TEF products measure, certify and calibrate; Loudspeaker fase, STI measurements, CIS measurements, PI measurements, Microphone polar diagrams, Loudspeaker polar diagrams, Waterfalls, Acoustic measurement, Real time, MLS, FST, RTA, THD, RT60, Reverberation time, Reverberation patterns, Fase measurement, Dosimeter, Alcon, Concert halls, Theatres, Public sound systems and so on.

The products in this group are developed for production lines. The products are measurement platforms for manufacturers of loudspeaker and microphones and serial production lines which implement loudspeakers and microphones (car industry). The products are implemented in the production process and custom made for each purpose.