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QC Standard System

  • Ultra-fast testing at physical limit
  • Sensitive detection of Rub & Buzz in time domain
  • Ambient noise detection
  • Easy limit calculation, grading, limit-import
  • Automatic detection of "golden reference units"
  • Test management tool
  • Production indices (Cpk, Ppk)
  • Yield and  Single Value Statistic
  • Operator and engineer access level
  • Auto-detection of amplifier gain
  • Multi-language on-line support
  • Simple integration into assembling line by digital interface
  • Rugged hardware, 19” frame
  • Integrated sensors (50A current , 200V voltage)

The KLIPPEL QC System combines the advantages of a comprehensive software and hardware solution with the flexibility of a modular system. QC Basic fulfills common demands of modern end-of-line testing while keeping an eye on the budget. QC Standard is based on the same measurement hardware and software framework, enhanced by advanced features setting new standards in speaker and audio system testing.

Unique extension modules integrate seamlessly for advanced applications like nonlinear parameter testing or leak detection. Additional software tools are available for data post processing, statistics, process control and much more. for special requirements, QC Standard provides a plug-in customization infrastructure to integrate tailor made features easily. This all is supplemented by a selection of hardware accessories for an all-in-one comprehensive testing solution.


The QC Start tool is a simple, yet efficient software framework exclusively designed for daily QC business:

  • Simplify test and data management
  • Simple test selection by barcode
  • Define operator rights and instructions
  • Synchronize multiple production lines
  • Access remote online support


Acoustical tests:
  • Response
  • Average Level
  • Rub+Buzz
  • Polarity
  • Phase
  • Noise
  • THD
  • 2nd Harmonic
  • 3rd Harmonic
  • 4th Harmonic
  • 5th Harmonic
  • Incoherence
  • Ambient Noise


Electrical tests:
  • Impedance
  • Phase
  • Re
  • Le
  • Cmes
  • Lces
  • Res
  • fs
  • Qts
  • Qms
  • Qes
  • Bl, Mms (using added mass)


QC Standard System packet includes


Hardware requirements


QC Applications


Related information

Other versions of the QC SYSTEM


W. Klippel, S. Irrgang, U. Seidel, “Loudspeaker Testing at the Production Line,” presented at the 120th Convention of the Audio Eng. Soc., Paris, France, 2006 May 20-23.

W. Klippel, U. Seidel, “Measurement of Impulsive Distortion, Rub and Buzz and other Disturbances,” presented at the 114th Convention of the Audio Eng. Soc., 2003 March 22–25, Amsterdam, The Netherlands, Preprint 5734.


Wolfgang Klippel (2011). End-Of-Line Testing, Assembly Line - Theory and Practice, Waldemar Grzechca (Ed.), ISBN: 978-953-307-995-0, InTech,  Available from:

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