Bur Brown op amps have been difficult to buy since they were taken over by texas instruments. At least it was 2 years ago. Don't know how it is today. An other nice single opamp is the AD 797 but I heard it is rather tricky. I tried it in my pre amp but there wa to much DC offset.
OpAmp Swap?
I own a pair of Shanling SP-80 Monoblocks. For those of you who don't know these are really integrated monoblocks. As many have found the Amp section is a fairly good design, however the Pre is lacking. Right now these have a Chinese OpAmp (opa2604ap). My question is whether or not I can drop in a Burr-Brown(now TI) opa627ap without any other modifications? Thanks in advance.