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990C Discrete Op-Amp
990 Discrete Op-Amp:  PDF

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.

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.

Attention, Summit Owners: The 990C+ is the perfect replacement for the Summit SA990 op-amp. You may find it interesting that for years I sold black-anodized aluminum potting shells and gold-plated pins to Summit to help them manufacture their 990 op-amps. When Summit went out of business in 2012, they still owed me around $2,000. Then Blue Microphones bought the assets of Summit and hired some of the key people from Summit to work for Blue. So, Summit was back in business under ownership of Blue, the key Summit employees were still working, and I am still out $2,000. In December of 2016, JMP Electronics took over as the primary contact for Summit Audio inquiries. I'm still out $2K. As the saying goes, no good deed goes unpunished.

Thank you.
John Hardy

Please contact The John Hardy Company for more details and application assistance.

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