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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"
  • Simple test management and synchronization
  • Customizable test sequences
  • Production indices (Cpk, Ppk)
  • Process control rules (Nelson/Weco)
  • Yield and single value statistic
  • Operator and engineer access level
  • Auto-detection of amplifier gain
  • Multi-language user interface (English, simplified Chinese, German, Spanish, Portuguese) 
  • Rugged hardware, 19” frame
  • Integrated current and voltage sensors (50A, 200V)
  • Simple integration into assembling line by digital interface


  • 100% production testing
  • Ensure consistency of production
  • Process control
  • More reliable than human ear testing
  • Comprehensive defect detection
  • Simple and intuitive operation
  • Seamless integration in production process
  • Compatible to Klippel R&D system
  • Flexible, modular solution to match your company needs
  • Simple customization with dedicated infrastructure


  • Transducers (woofer, tweeter …)
  • Headphones, Micro speaker
  • Balanced armature speaker
  • Active / passive audio systems
  • 3rd party audio interface
  • Multi-channel systems
  • Microphones
  • Incoming goods inspection

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 test management 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
  • Call post-processing tools
  • Device setup and calibration
  • Access remote online support


Acoustical Tests

  • Frequency Response
  • Average Level
  • Band Levels
  • Rub+Buzz
  • Polarity
  • Phase
  • Noise
  • THD
  • 2nd Harmonic
  • 3rd Harmonic
  • 4th Harmonic
  • 5th Harmonic
  • Incoherence
  • Ambient Noise Detection

Electrical Tests

  • Impedance
  • Imp. Points
  • Imp. Phase
  • Re
  • Le
  • Cmes
  • Lces
  • Res
  • fs
  • Qts
  • Qms
  • Qes
  • fb, Qb (vented box)
  • Bl, Mms (using added mass)

QC Standard System packet includes

Production Analyzer hardware
Amplifier and speaker cables
QC Standard software
db extract (data extraction tool)
Software protection dongle

Hardware requirements

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:


Germany: P10214407; 102009033614
USA: 7,221,167; 12/819,455
China: 03108708.6; 201010228820.8

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