what op amp is used in these eq ckts?

[tranceracer]

What op amp are being used in these eq ckts?
http://aronnelson.com/gallery/v/STMs-Circuit-Ideas/Modified_Sans_Amp_GT_2_equalizer_with_midband.png.html

And this one?
http://aronnelson.com/gallery/v/STMs-Circuit-Ideas/Three_band_Eq_non_interacting_bands.png.html

Thanks!
-tR

[anchovie]

There are many different op-amps that you could use, which is why there isn't a type specified on those schematics. They're EQ circuits, so there aren't any clipping characteristics to consider, for example. Personally, I'd go for TL071 or TL072.

[tranceracer]

Thanks!!