If I lay into it heavy, it can get a little boomy on the lower E string notes - not past E, F, F# and G on the E string though.
That might just be poor technique on my part - IDK.
Laying into it heavy is the only way I play my bass. Maybe if you have a light touch and you're playing jazz or something, you wont notice it, or the way you EQ. But playing aggressively, even with a pick, thru my Ampeg with the UltraLo engaged, its far too boomy for rock/punk. If I up the mids and highs, I get that clanky sound I hate and if I cut the UltraLo switch off, I dont get the presence I want. My $69 SX Ursa 1 JR with the Quarter Pound pickup sounds awesome at the same settings my Mustang sounds too boomy with which is disheartening.