ernie ball strings to blame?

i just recently purchased a olp mm2, looking to upgrade electronics. so i installed a seymour smb-4d pickup and a seymour pre-amp(thanks to Georynn) looking to warm the sound up and give it more mid-tone punch. and while it has done that considerably, especially for the E and A strings, i have to admit i was disappointed with the end result. the D and G strings just sound weak and zingy, and have this incessant F# ring (mainly the D string) and is amplified by boosting the mids. it did come stock with some ernie ball strings, so im thinking (and hoping) that they are to blame. i was considering flat wounds, but i still like to rock out too, so i dont want to lose that aggresive growl type tone, i just want something warmer, something that the high strings will speak up on, and definitely not as bright. anyone with the same setup or other wise that could offer up a suggestion or two?

thanks in advance
julian

 

thanks i'll give some of these a try! and ive tried playing with the pickup, with no help

thanks!

 

okay i had to settle on a set of dean markley blue steel strings because they were the only nickel wound strings they had in my local store, i guess ill just have to wait until i go to GC or order some. they did help some but not as much as i would have hoped, i guess thats why he has so many that hes trying to get rid of!