Hello:
After having a Traxis DBS4500 for awhile I decided to try out the Traxis DBS4550 since it has a blind search funtion. After setting up the DBS4550 I found that The unit did not pass Raw AC-3 audio. I tried to manually change PID's to the correct AC-3 PID but still no luck. I then tried out a Traxis DBS3500, I set this receiver up and found this unit too did not pass AC-3 Audio. I then moved back to the DBS4500 and AC-3 was passed thru with no problems. I checked with DMSI about this and was told that all units should pass AC-3. At this point it appears that if you want a Traxis unit that passes AC-3 audio you will need the DBS4500. I did notice that the menus are different from the original DBS4500 that I used first to one I use currently.
Jerry
After having a Traxis DBS4500 for awhile I decided to try out the Traxis DBS4550 since it has a blind search funtion. After setting up the DBS4550 I found that The unit did not pass Raw AC-3 audio. I tried to manually change PID's to the correct AC-3 PID but still no luck. I then tried out a Traxis DBS3500, I set this receiver up and found this unit too did not pass AC-3 Audio. I then moved back to the DBS4500 and AC-3 was passed thru with no problems. I checked with DMSI about this and was told that all units should pass AC-3. At this point it appears that if you want a Traxis unit that passes AC-3 audio you will need the DBS4500. I did notice that the menus are different from the original DBS4500 that I used first to one I use currently.
Jerry