If you have amp overdrive you can always try playing on the overdrive channel with a lil bit of overdrive. I have a Peavey bandit 112 transtube series and the blues setting i use for dirty blues is lows=6/7 mids=8/9 highs=3/4 pregain=3/4 and post gain however loud you want it to be, throw in some reverb and your good to go.