( also @Boswell @audiokid ) Hi Dave... I have a question about the ADK AP Preamp... I know you have one, so I thought I might pick your brain about on thing in particular... Last night I was tracking guitar for a song, and I was using an MXL 860XL Ribbon mic ( and a Senny 421) on a Marshall amp ( the mic combo sounded great, by the way - as of course did the amp as well - but that mic combo is one of my go-to favorite arrays for guitar amp miking) and I noticed that the Ribbon mic's signal was incredibly hot going into the DAW from the ADK pre. This had never happened before, I had the gain on the ADK set at only around 30% or so ( this was just the position it happened to be in when I turned it on), and the signal was very hot, bordering on distortion. I had to to turn the gain down to only about 20% or so to avoid overloading. I then noticed that the impedance button on the pre was engaged, ( which I had never used before while using this ribbon) so, I turned it off, at which point the level dropped considerably, and I was able to bring the gain up to about 75%, with a nice, quiet, clear, healthy level before distortion occurred. (FWIW, I was using the Line In of a Focusrite i/o to get the signal into the DAW, which had no added adjustable gain, and the XFO/OpAmp combo in the ADK was a Sowter/JH990c) In the end, after getting the gain structure right, the result was a great sounding track, the ribbon worked wonderfully, very warm and smooth in its tone. So my question is... have you ever found the same thing to be evident on your ADK pre when using a ribbon mic and the impedance button? I couldn't believe the amount of gain that was added by inadvertently engaging that impedance switch... or did the transformer combo have anything to do with this? I have noticed gain differences between different XFO's in the AP, but never anything this dramatic... Thoughts? d.