If anyone is interested, this is the reply I received from the people at AMT.
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A recommended pot for Eventide H9 is up to 25kOhm
We have now 25kOhm (in early version we had 50kOhm, but you can easily make it 25kOhm )
Please unscrew the bottom panel and make a photo and send us, we'll tell you what to do.
Please read about expression pedal the next link (maybe it'll help)
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I've also read of few H9 owners successfully using this pedal even with 50kOhm pot. It seems H9 handles it just fine. I really like the compact size of this, so this is what I think will go with.
