Pdf jrc4558

May 23, 4. This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website.

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Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. Back when my datashwet Rat II died and I needed a replacement, I was kind of shocked just how inferior the current production Rats are — and the only substantial difference is the op amp.

But I beleive the old JRC version is the holy grail of some even though the actual chip in some of the originals may be made by others. There are other factors like the slew rate that may contribute as well, but to me the input impedance difference is the biggie. They are still available in isolated caches of parts, although they can sometimes be hard to find. By all reports, these sound as good as the original.

I feel this is the primary reason for the audible differences. Sorry to kick over any sacred cows jrc this is just my opinion based on my experience.

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We also use third-party cookies that help us analyze and understand how you use this website. We will never spam you. Component Datasheet. Tags Op-amp. WR-FFC series pre-folded flat flexible cable are compact, thin, and light to save space. May 24, 5. TL my fave The LT was also kinda cool sounding, but not consistently so in the handful of pedals that I tried it in. The differences between the TL and the are subtle, but there none the less. All had the socket installed, and were cooked 2 output resistor mod.

These 3, in particular, sounded really, really good. Remove the compensation cap and put a TL in there with the rest of the circuit unmodded and it sounds awful. Jun 4, There is a post above that is proof positive of this. If you hear a difference then by all means go with what sounds best to you.