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Re: U87 Repair Details
Author: Uwe Sattler/NeumannUSA
Date: 09/10/2012
1.) All replacement capsules have been 100% tested for their acoustic and electronic parameters at the factory to very tight tolerance. Most often observations of drastic differences between 'before and after' service are due to the deterioration of the 'before' from decades of aging. Contratry to allegations by various outside observers, a capsule manufactured today does match all characteristic specifications of the same capsule model at their time of manufacture. Modern improved manufacturing methods probably allow replacement parts to fall within even tighter tolerance.

2.) Since thorough acoustic testing has been performed on replacement capsules at the point of manufacture with all the sophisticated equipment and test methods used for new microphone production, at the service point verification, tests and measurements are focused on performance of the electronics. The test methods are well established and include verification of gain, frequency response, noise, dynamic range, THD. Any deviation outside the prescribed tolerance bands are corrected, with a detailed description of the findings and remedial services provided.

3.) If 3rd party modifications affect the technical specifications we first consult with the client regarding the reason and/or desirability of the modifications. Yes, we have the capability and parts to restore most Neumann products to factory specifications! However, this is done only when specifically requested and with the express consent of the client.

Any service activity on a microphone starts and concludes with a listening evaluation by our experienced technicians.  
 
Reply
Trahern Jordan
09/09/2012
Uwe Sattler/NeumannUSA
09/10/2012
Klaus Heyne
09/10/2012
Klaus Heyne
09/12/2012
Trahern Jordan
09/11/2012
Uwe Sattler/NeumannUSA
09/11/2012
Klaus Heyne
09/12/2012
Trahern Jordan
09/12/2012
Martin Schneider/Neumann
09/12/2012
Doug Jane
09/12/2012
Martin Schneider/Neumann
09/13/2012
Doug Jane
09/14/2012
Uwe Sattler/NeumannUSA
09/12/2012
Klaus Heyne
09/12/2012
Uwe Sattler/NeumannUSA
09/13/2012
Doug Jane
09/13/2012
Uwe Sattler/NeumannUSA
09/13/2012
Doug Jane
09/14/2012
Martin Schneider/Neumann
09/14/2012
Doug Jane
09/14/2012
Trahern Jordan
09/15/2012
Martin Schneider/Neumann
09/16/2012
Martin Schneider/Neumann
09/16/2012
Trahern Jordan
09/17/2012
Kirk LaBelle
10/12/2012
Martin Schneider/Neumann
10/12/2012
Kirk LaBelle
10/12/2012