October 16, 2013:
In January of 2013, manufacturing of the 990 was converted from
through-hole assembly to surface-mount assembly. Many improvements in
components were made. The basic circuit and package dimensions remain
the same, but the name has been modified to "990C+" to signify the
changes. See the 990 data package for details.
990 discrete op-amp is the finest op-amp available for audio
applications. If you want superior sound quality, the 990 can provide
it. The 990 is used in the most critical audio applications. Leading
recording studios, remote recording companies, disc and CD/DVD
mastering facilities, and TV and radio stations use the 990 for
superior performance. Several mic preamp products
using the 990 are available from The John Hardy Company.
contact us for more details and