The shape of this eq is correct, but not the magnitude. It's flattened, I'd say 50-75%.

Where does that nice mid-side mixer come from? Also Q10? Although plugins without direct numeric input are evil though.

I might write a guide to doing that properly in Windows.

Linux is suprisingly way simpler to set up thanks to no need for silly fake devices and thus clock syncing, but lacks good plugins with graphic display - the best I found was LV2 4 band parametric, which is obviously 4 band + 2 shelves only. Also haven't managed to run audio through VST yet.

I have been using AHP for quite a while now.  I did experiment with various plug-ins, both 'pro' versions and the free ones.

After fussing for quite a while I settled on using the 1/3rd octave (31 band) EQ that is supplied with OSx.  I was never really satisfied with the audible results of any of the others I tried.

And I also gave up on trying to 'correct' the top end (6KHz) 'problems' using EQ.  The Anax mods do a decent enough job for that.

Instead I use the 31 band EQ to add a bit of low end from 100Hz down to 20Hz in a very gradual and gentle slope with a very minor hump in the 60 and 80Hz bands.

The total amount of boost at 20Hz is 4-5dB max. and it gently tapers off so that 100Hz is less than 1dB.

This provides a degree of impact and thump to the bass and all instruments that have a sharp initial (percussive) edge, like symbols, piano, guitar, and the like.

It also tends to 'soften' the top end just a bit which is easily controlled by adjusting the amount of overall boost from 80Hz to 20Hz at one time.  This is a 'feature' of the plugin I use in that it allows you to select a range of frequencies and move them up or down as one.  This keeps the slope intact and just changes the magnitude of the added boost.

I also use a gain plug-in to match the input to the output while listening and monitoring the peak input and output.  'Clipping' should be and is easy to avoid this way.

I also had accumulated a series of monitoring plug-in tools, most of which are free, such as phase and dynamic range monitoring.  As well as spectrum analyzers and a white/pink noise generator so I could see what effect the EQ was actually having to the FR at the output of AHP.

And after all the fussing, I find the results quite gratifying.

JJ

I do like the results, but I find it very hard to compare. The HD800 without EQ is like a track with a big exciter. Everything sounds more spectacular and more stereo (wider), but it will soon give you a head-ache  . The sound with the EQ on is much more pleasant, but you will notice the stereo being less wide, and if you A-B you will notice that the HD800 without EQ sounds 'better' (more highs, wider etc.), and even with the little EQ'ing I applied, you hear a big change in tonality.

The reduction of the high frequencies is way more effective than the boosting of the dips. I will Anax mod them eventually, but I need some links of the stuff I need to buy. We don't have any of the stores you mention here in Europe.

Thanks for that purrin. I removed the boost, and it all sounds much more natural now (more like my studio monitors).