Do I need a two place or four place intercom?
Hope this is the right place to be asking this question. Since I gather the use of portable intercoms would be more prevalent for PPLs, someone here may be able to offer some advice.
The aircraft in question (C172) has the normal input plugs for headsets for the two control seats, but there are no plugs for the back seat passengers. So to enable one back seat passenger to listen in on ATC and speak to the pilot and passenger upfront, would a two place intercom be sufficient (I'm assuming I only need to use the headphone jacks from the right hand seat and plug the two place intercom in to this). Or, would I need a 4 place intercom and all three people plug their headsets in to this?