I can say my LX2610 is not as noisy as my old B2650, but not by much. I still wear hearing protection inside the cab because the HST whine is stiff annoying to me. You can compare the two cabs and see how much sound absorbing insulation is installed in each cab. Look up each one in the Kubota online parts under cab, sub assembly N17000 and/or N17201. You could always add sound insulation (Dynamat or something similar) to the B3030 using the LX cab parts illustration as a template and as a reference point.