AusTex64 said:I was not accurate regarding how Rupert Neve uses NE5534's in the Portico range:
<The circuitry is built almost entirely using conventional-sized components, with the old familiar NE5534 op-amps doing the bulk of the work, supplemented with separate transistors in appropriate places. Rupert Neve's designs traditionally employed single-sided class-A topologies, and it is hard to square that approach with these Portico circuit boards covered in op-amps. The secret missing ingredient is that he uses a circuit technique with the 5534 op-amps which offsets the DC point of their output stages, so that for signals below about 0dBu they are effectively running in a single-sided class-A mode. This removes crossover distortion artifacts completely and is a significant contributor to the sound of this preamp.>
Also read some info indicating Rupert Neve had a hand in the design of NE5534. True?
Ignore the man behind the curtain.
AFAIK the Signetics NE5534 fell out of a Phillips op amp (TDA1034).
I don't think Rupert had semiconductor design chops. More likely an early customer.
JR