Back on topic, I was browsing W8JI's web page for antenna information, and found this. I totally agree. I hear so many operators lately running transmitted audio with bass and treble both turned up. Besides sounding stupid in my opinion, I often trace sources of splatter to these Lids. WideFi or Enhanced Audio Enhanced SSB audio is a generally bad idea, since it adds and boosts unnecessary lows and highs. Audio response flattening brings levels of unnecessary low and high frequencies up, and this rapidly increases power level in unwanted off-frequency products compared to normal communications audio. The frequency difference between lows and highs is wider, so the "junk" extends further than normal. The level of lows and highs are significantly stronger than levels in normal communications audio, and this makes IM products much stronger. As a matter of fact, energy in IM products does not follow a linear increase as base and treble are increased! Unwanted power on adjacent channels increases at several times the rate of the power increase in base and treble! Make no mistake about it, enhanced SSB or Hi-fi SSB audio, even with perfect "brick wall" filtering, is always going to have significantly more unwanted energy on adjacent channels when compared to regular communications audio through the same system. Many of the radios popular with the ESSB crowd are among poorer radios for IM performance! My own opinion is Hi-Fi audio is OK on emptier bands, but we should do all we can to discourage enhanced audio on crowded bands or near weak signal areas." There is a whole lot more technical information about this on W8JI's website.