PM1200
The PM1200 was designed specifically for warbirds, open cockpits AND for loud aircraft like your Pitts.
This intercom should be installed as a PTT intercom, then you will have what you want. Our AMP (Active Microphone Processor) literally strips the background away and you are left with great intelligibility.
By a push of the front panel copilot volume knob, the PM1200 will then be a VOX intercom using our IntelliVox system. This mode could be used in normal cruise mode.
It's not designed for hi-if stereo (has mono music input) but for tough environments.
Mark Scheuer