Hi everyone, I just bought a Mee Pinnacles from a friend, and when I changed the cable normal for the cable with microphone, I realized that in a call the microphone sounds very low, I tried with another cellphone and the same result, the quality sound with this cable is normal but the problem...

Helo, I'm considering the Apex Pinnacle and I'd like to hear peoples thoughts/impressions and comparisons against other high end amps (i.e. Cavali Lau and/or Studio 6 or anything else for that matter). Also what would be your preferred tube lineup with each? Thanks in advance!