Symmetry acs-1 schematic or op-amp type, anyone?

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I have a Symmetry ACS-1 active crossover that I want to modify. The writing on the op-amps has been removed. I would very much like to see a schematic or at least find out which active parts are used.

(When I see parts where labelling is removed, I usually refer to it as "antimagnetic parts" or parts modified with "antimagnetic paint" just for fun. It is a really silly practice in my view.)

Your help would be much appreciated!

Petter
 
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