Lab Measurements with the APX555 from Audio Precision
Since we own in our Lab the flagship Audio Analyzer APX555 from Audio Precision, we publish some measurement results from commercial devices.
Please note, that we offer measurements from your devices in our LAB. You will get world leading measurement equipment plus our experienced engineering. The results from an APX555 are worldwide recognized. We can do small series batch testing as well. Please do not hesitate to contact us.
Selftest of our APX555 with balanced loopback
Mic Pre-Amplifiers
Stageline MP102 main/battery powered Mic pre-amp with 24V Phantom power
Mictotech Gefell MV210 ICP/IEPE pre-amplifier
passive DI boxes (convert unbalanced input to unbalanced via a transformer)
Transformers
An important quality factor is distortion at higher levels below 100Hz
Generators
China 1kHz "ultra low distortion" after careful adjustments