I was listening to podcast FDR3047 Conquering Stefan’s Ancestors - Call In Show - August 7th, 2015 and I noticed I had trouble understanding what Stef was saying, because his voice was very boomy and the overall sound was quite muddy. My suggestion is to use for example this following tutorial to do a high pass filter EQ. I'm sure you do editing on the voice, but this podcast was very boomy and muddy.
I was using a pair of Genelec G Two's behind an Roland UA-25EX for the listening.
http://music.tutsplus.com/tutorials/how-to-process-vocals-for-podcasts-or-voiceover--audio-6969