I know of a number of problems people are having with Spectrum DX radios, so bad in fact one modeler poured fuel on his and set it on fire, he was so disgusted. It appears Horizon is having trouble nailing down the problem as a number of people sent their in only to receive them back and experience another failure.
I watched in dismay at a glider meet last August, when a pilot lost control of an expensive hi-tech glider, he was using a Spectrum DX 18. Ansolutely no control what so ever.
I came into possession of a DX 9 and have been reading of people having problems with them as well. I'm not going to use it. I put it up for sale on R/C Groups.
I may go back to HiTec for radios.