Newbie here. Just bough the ZA3 and then a few weeks later, the ZD3 and am still not crazy about the stock sound. I understand that there is much potential to improve through op amp rolling. I'm using the XLR connection between the two, and ordered the Sparkos op amps for the ZA3 shortly before ordering the ZD3. Which unit should I try replacing the op amps in first? If the ZD3, can I use the op amps I bought for the ZA3 in the ZD3? I ordered the op amps directly from the Fosi site, choosing the SparkoS SS3602+DIP SOCKET-2PCS and the SparkoS SS3602+DIP SOCKET-1PCS because that's what the Fosi site ChatBot told me I needed with the XLR connections..
