Op-amp replacement for Unison Unico

It also depends, as Viridian alluded to, what opamp you are replacing. If the stock opamps are 2 channel then it will take two of the 627 (mono opamps) on a brown dog adaptor to do the substitution. Also you need to note the direction of the chip you removed (look for a small indentation on one end) and make a note. Make sure to ground yourself to the unit to prevent static discharge. Radio Shack has an inexpensive strap for your wrist. Sounds much worse than it is. This is something you can do.

Thanks Viridian and Drrsutliff. I am going to open up my amp tonight to take a look. I have also noted that there are a number of variations of the OPA-627 which I will reseaarch a bit more. I plan to tube roll also but I noted that in the 6 moons review of the level 2 mod of the Unico that the reviewer attributed much of the improvement in dynamic drive and frequency extention as likely due to the replacement of the op-amp to the Burr-Brown's. So I thought that if this was a plug and play operation, that I might get some appreciable improvement by doing this myself.

If this is a 'dual' opamp....8 pin dip of standard configuration, there are dozens of opamps from which to choose.
I built a headphone amp using OPA2134s.
And yes, several 'models' of each can be produced. some have parameters optimized which won't mean much to an audio guy.
Learn to read the data sheet........at least for the stuff parameters you need.