RE: hitec 555 and trackerII
i will be modifying my 555s to work with my polks my friend.... it turns out.... had to do the same for his airtonics transmitter and 555s as airtronics uses ch 6 also the 555 is a 8ch reciever but only uses 5 channels you can modify this by opening it up and soldering a pigtail to ch 6 (voiding the warranty of course) but there was a thread and faq on how to do this as i remeber somewhere....