It was a 319. Though strangely enough, yesterdays 752 from DEN to PDX had the first, what I would call clear, channel 9 signal I've had in a while. Usually there is a lot of bleed over from the other channels and you have to crank the volume to hear the conversation (which hurts when they swith from APU power and the system resets). On yesterday's flight the volume was even across all the channels and there was no bleed from other channels.

Too bad my 752 LGA-DEN (also yesterday) had channel 9 off. It would have been interesting to hear the ATC/cockpit banter as we were crossing the active landing RWY while a US 321 had to go-around.