The TerraPhone Intercom system utilizes a different microphone than used
by Peltor or Stilo. Even though TerraPhone states that you can use a Stilo helmet, this is in fact not the case. The typical patch cord
adapters out on the market are just a couple of connectors and some
wire. In fact all they do is allow you to physically plug your Stilo
helmet into the intercom, but almost everybody complains about the low
volume levels. My adapter protects your microphone from harmful power
being sent to it from the TerraPhone intercom. It also amplifies the
output from the Stilo microphone to the proper level.