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d² Mastering is the Los Angeles based studio of Grammy nominated mastering engineers Dan Hersch and Dave Schultz.


collected years experience

50 Years 


Albums Mastered



Total Grammy Nominations



For over 20 years, the two worked together at DigiPrep Mastering. The new name signals a new era with a change in management. 

d² offers the same dedication to high quality mastering that customers have come to expect from these two veterans as well as the committed customers service that only a family business can provide.

Located in Atwater Village, CA just north of the Silverlake/Los Feliz area and northeast of Hollywood, the studio is conveniently located just off the 5 freeway in an old industrial building which once manufactured fuel for racing and stunt cars. Custom electronics and vintage gear are the backbone to this analog first facility although they can accommodate all tape playback formats (analog or digital). 

Contact for rates and further information.