Self on Audio, 3rd Edition

Chapter 5Precision preamplifier ’96, Part I

(Electronics World, July/August 1996)

Sometimes you just feel that the world needs another preamplifier. Having put a lot of effort into power amplifiers and their problems in the meantime, I thought it would be interesting to see if the original Precision Preamplifier (Chapter 3) could be significantly improved. It could. The improvements were due to a bit more thinking being done, rather than any new and exciting parts becoming available.

The 5532-based moving-magnet disc stage was retained with a few changes (most importantly, a cost-effective way to tighten up the RIAA accuracy) as attempts to make a hybrid stage that was quieter were not encouraging; the plan was single bipolar input transistor ...