At the moment I am simply using the Asus DGX soundcard controller, its a 10 band EQ. At first all the EQs sounded a bit wobbly and I presumed that it wasn't as powerful as an EQ as my last one, before I upgraded my Hard Disk to SSD - I had used EasyQ over JR Media Center.
Then I reset the levels to default - the sub volume was re-set at 75 percent. This removed the wobble effect, and it seems very transparent to me. The software seems to have built in anti-clipping and setting the sub-volume at 100 percent kicks in the clipping protection - EQ or not...no wonder I thought this whole soundcard sounded a bit wonky. It's good now.
With computer EQ, it seems vital to lower the gain in order to avoid digital clipping. I only have the LCD2s - but I am already getting an understanding of why the LCD-X and LCD-XC is tuned the way it is - now knowing the weakness of my LCD2 planar. With the LCD-XC brightness could only be created the way it is without entering the treblezone issues...but I can say, the ortho drivers have no weaknesses all through the soundspectrum up 4khz in my sliders...sound stage is always wide and image is always sharp here. When you make a peak past 4khz and then listen...the soundstage shrinks dramatically and wobbles around a lot - indicating an erratic treble response. Otherwise without EQ - the planars set the treble as supplementary to the midrange and therefore all the treble flaws are masked.
I previously only used EQ as a diagnostic tool. Now using it as it suits my listening volume and as a means to alter the signature whenever I feel like it - adds a whole new dimension of musical enjoyment. If I had only one headphone and had available to me a high quality EQ at all times, it would be the LCD2s...I can tune it to to sound like better versions of HD650, K701 and HF2 in sheer refinement, lower distortion and outright speed. I cannot tune the treble to match the D7000s or HD800s - but both these cans have annoying treble peaks to my ears anyway.
However this being said - without an EQ...the Grado HF2 is extremely versatile as a low level can...suiting everything with only an adjustment in the low level volume to compensate for recording types. I don't often get obsessed with a can...but like the LCD2 and the HD650 before that...lately my mind is thinking only of my Grado HF2s and when can I get some new pads on it?
I am addicted to the HF2 Grado sound and will wait till I get the SR60s before I can say for sure if I am becoming addicted to the Grado sound. 6 years into my headphone journey...and all this time people rave about Grados and I'm thinking these people are nuts, because obviously the graphs show they are wonky. I've had these HF2s for three years and knew I liked them over my D7000s...but not until I understand that it is a low listening level can recently that I just love them. What is it about the HF2 that it can twang the uppermids like only a tube amp can?