Audio Op-Amps

[BJ]

Paul Schreiber wrote:

> Lastly, there is another bipolar dual op amp called a RC4558 that JRC made.
> Used EXTENSIVELY in early
> Yamaha synths, mixers, cd players, and car stereos. Not a bad part, was
> about 1/2 the price of the TL07x
> in 1984. Makes a difference: JRC rep told me Yamaha used 125,000 a WEEK!

Yes thats interesting, the japanese manufacturers seems to be wery found
of the
4558, its used in a lot of old Korgs and some Roland synths too!

And yesterday i had a fast look under the hod of my ZOOM 1201 reverb
unit
and what do we found as I/O signal amp, well a 4558 to the BB PCM3001
codec!!

BJ