I use the Aker setup for my TK, and for my wookiee, I connect a push to growl setup into my Aker. I will be using my Aker for my Tb as well, minus the static bursts from the ICOMM.
TK6294, aka Jim, sells the whole setup. The 10 Watt version is enough power for any costume and small enough to not be a bother below chest armor or wookiee fur.
http://www.whitearmo...n-system-icomm/
Link to order speaker and mic:
http://store.voicebooster.com/voicebooster-mr1506-aker-10watt-voice-amplifier/