990 Discrete Op-Amp: 

The 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.

Please contact us for more details and application assistance.