Mine is ATM3 and it's super easy to do. Just open the panel on the front and use any flat driver to adjust it. Adjust the needle in the bubble zone you are all done. Note : Make sure you turn down the volume attenuator knob while you are adjusting it.
This is ATM4 front panel
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Hi Paul, thank you very much. Do you come with us in Munich ? Best regards.
I have a good price for buy two Air Tight ATM-4 but my preamplifier is with XLR and ATM-4 with RCA. So I have adapter Neutrik but I ask me if it is a good solution ?
Your ATM-3 is with XLR or RCA ?