Hi... At the risk of asking too many questions... Here's one about a boomy stage... I did read a ton of the existing threads first.:-( Last night, played a pub gig that we've done maybe 10 times before. The Bistro in Hayward CA--long square room famous for some sound difficulties. The last two times, since they tore the ugly beer-stained carpet off the stage and refinished or replaced the flooring, I'm getting horrendous booming centered on F#, with a bit also at F and G. 4 string P-bass, fairly new D'Addario nickel wound strings, fingerstyle, entirely different rigs both times. (EDIT: No PA support. ALSO, 1st time using the MG800 at 4ohms...maybe this was the biggest difference... Problem is also pretty bad playing up an octave, ex: 9th fret of A string. Tried moving rig around a bit, but never more than 5 feet from back floor or eight feet from the side wall. Tried EQ options available on genzler Magellan mg 800, including semi parametric EQ. MY QUESTION: Would a milk crate under the cabinet do the trick? Or should I experiment with HPF or a outboard parametric EQ? (HPF sounds kind of interesting in its own right, but would hate to lose any additional low end, and, the problem is also pretty bad an octave higher, as mentioned above.) For cabinets, was using pair of small 1 x 12s this time, and fairly big 1 x 15 previous time with same problem... 1 x 15 has casters. Seems quite likely the problem is the stage, but can't test until next gig. Thanks!