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Self on Audio, 2nd Edition
book

Self on Audio, 2nd Edition

by Douglas Self
June 2006
Beginner
488 pages
13h 2m
English
Newnes
Content preview from Self on Audio, 2nd Edition
7

Overload matters

There are no gain controls on RIAA inputs, so the overload margin, or headroom, is of considerable importance. The issue can get a bit involved, as the frequency-dependant gain is further complicated by a heavy frequency-dependant load in the shape of the feedback network. This heavy loading was a major cause of distortion and headroom-limitation in conventional RIAA stages that had emitter-follower outputs with highly asymmetrical drive capabilities, and for some reason it took the industry a very long time to wake up to this. Once more the 5532 op-amp solved that problem.

There are also interesting limitations to the levels which stylusin-vinyl technology can generate. This chapter tries to sort out the issues involved in maximising ...

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Publisher Resources

ISBN: 9780750681667