I am considering a Goliath II Jr in which the original 10s were replaced with Eminence Delta-10A speakers. The seller reports "these speakers don't love the low B. Freq response isn't great below 180Hz or so." The original horn and crossover are in place. My question for the TalkBass community: does anyone know if the specs of the replacement speakers are so different from the originals that low frequency response would suffer? Or is the cab design simply not ideal for low B playing?