Re: Uli Behringer of The Music Group Q&A
Dear Bob,
thank you too for your comment.
Output stages.
I would have to check what circuitry has been applied for in the ADA8000. In general we use servo-balanced output stages which provide for a 6 dB gain adjustment if pin 2 or 3 are tied to ground. It is possible that the ADA8000 uses a simple inverter for the balanced output stage due to the fact that the unit does not have (shorting) TRS outputs.
However in contrast to the TL072, the 4580 which we're now using in the new ADA8200 can drive loads up to 50 mA which should resolve any issues you might have encountered.
All our designs feature current-limiting output resistors of around 100 Ohms.
Gain VR linearity.
This (common) problem has been resolved with a Midas-designed preamp which uses a stereo VR with laser-trimmed carbon tracks.
Clocking issue.
I am not familiar with any clocking problem but I am happy to feed this information back to our R&D department in Germany. Perhaps you could drop me an personal note here so we can better understand how to replicate this issue.
Thank you for your valuable input!
