Early this year I wrote in this forum about the harness of my QSC K12 and what others were doing to reduce it. I realized other users have similar problem with QSC K12 and I think with that the interest for QSC K12 as KPA monitor have died down. The mostly discussed monitors now are Yamaha DXR10 and the Atomic. However I did not give up on my K12 because it is a good acoustic guitar monitor together with KPA using the Acoustic A-E profiles that I downloaded from the Rig Exchange ( many thanks to the uploader of that profile). I can say it was a better compared against my AER Cube 60 Bingo. Another reason for sticking with K12 is that I bought it at great discount and I don't want to spend anymore for another.
I asked my best friend Google for a workaround and found out that the famous sound engineer Bob Clearmountain used tissue paper to tame the harshness of his Yamaha NS10 monitor during his time. However realizing that this was not a robust solution I googled again and found that the same principle was used by Weber Beam Blocker (Although some would say that they are different principle but for me they are the same). I was thinking then how to use the principle with my K12 and while searching, the lowly mouse pad got me very curious and as a result this is my QSC K12. I'm no longer eyeing at any monitor since.
What I did was attach two mouse pads using mounting tape and adjust the KPA EQ to fine tune. You may ask why not just adjust the EQ to tame the harshness, however I found out that I cannot duplicate the mousepad effect on reducing the harshness with EQ adjustment alone. The have different effects the way I hear it. However if I want to use it as acoustic guitar amp I need to remove the mouse pad and switch KPA to acoustic profile. I was tempted before to adjust the area of the mouse pad to get variation in the harsh reduction but I think I hit it the first time so I don't want to experiment further.
A word of caution though and a disclaimer. This method may have the potential to damage your speaker. I only play music at home so I don't need that much volume compared to live gig. However I have used this for quite sometime and still I haven't found any adverse effect with my K12. To those who wanted to try kindly share your observations, maybe I'm just having a placebo effect, well I don't know
My current predicament is how to get my K12 to be used as electric and acoustic amp without too much hassle of removing the pad from the mounting tape and back again. Maybe you have a better idea