Since we are on the subject of OPA2132 my opamps finally arrived, they must of gotten or something, friend sent them a month ago.
Anyhow I got
The OPA2132, LM4562 and LME49722 are a surface mount package on DIP adapters, I'm just a bit unsure about the OPA2132U what does the U stand for and are they safe to use? Although I have been using them in this combination of 4 OPA2132 I/V and 2 LM4562 they seem to be working fine just thought I check with you guys though
Coming from the standard E1 edition I'm quite surprised at the vast improvement in SQ, I was thinking it would improve a little, not this much, I can never go back to flabby bass no detail NE5532. The detail in this op combo is just amazing so articulate with a tighter denser bass, however it is a tad bright not painfully like having ice picks in your ears, just a little unnatural to my ears through the Fostex TH900, not that the TH900s are natural sounding, far from it, it's brighter then the NE5523. Also asus say this opamp combo is "slightly cool" I didn't at all find them less warm, but could be on other HP's like the HD800.
Overall I'm very happy with the SQ, and now want to tryout the muses, rather then buying a better DAC :)
I have some 2132-s, i´m going to try them in the buffer with ad797 in i/v. I also had your op combination however i found the 2107 in i/v and 2132 in lpf better. It was a little less bright and more mid focused. Right now i am still trying to find a good neutral combination with the ad797 in lpf. The op-s i have right now are:
I tested a lot of combinations with these but still haven´t found a truly neutral and good sounding combination.
lme49990 and opa827 are coming soon. I also have some lme49710-s but i am waiting if i will use 49720 in the one before i invest in adapters for them. I am guessing the 49710 has the same sound character as the 49720 just with better sound.