thermionic
Well-known member
- Joined
- Jun 3, 2004
- Messages
- 1,671
Excuse my ignorance, but off top of head I can't think of too many OEMs who use the OPA627. In fact, I can't think of many OEMs who use much tamer modern OAs such as the LM4562. It seems to me that modern uber-fast OAs require so much effort in terms of board layout and general design skill that if an OEM has the knowledge, they're likely to go with a discrete design - it would make for better ad copy than IC-based, right?
I wonder how many DIY-ers who fit these OAs have access to before-and-after FFT plots, or even a basic THD+noise average figure? The uber-opamps *should* give better figures than the 5532 etc, but in reality, whose design can exploit it? How many people have shown you plots / figures to prove the design benefits the uber-OA? There are many in the DIY fraternity who claim they can *hear* an improvement, but did they really lower THD /noise? Many claim they can hear cables, so subjectively-evaluated claims aren't remotely plausible.
I wonder how many DIY-ers who fit these OAs have access to before-and-after FFT plots, or even a basic THD+noise average figure? The uber-opamps *should* give better figures than the 5532 etc, but in reality, whose design can exploit it? How many people have shown you plots / figures to prove the design benefits the uber-OA? There are many in the DIY fraternity who claim they can *hear* an improvement, but did they really lower THD /noise? Many claim they can hear cables, so subjectively-evaluated claims aren't remotely plausible.