can someone tell me if i can use bowman headsets with a clansman intercom,i've two bowman headsets and intercoms fitted in my ferret and landrover but if i plug them in they work but you get a constant reverb back through the system which goes away if you put your fingers over the noise cancelling mics,try'd looking for an answer through google but found nothing,do i need diffrent prestel switchs or some sort of adapter,or even cut out the mic sections, hope someone out there has an answer,thanks.