Owner of BAT 75SE. Even though never heard the solid state BAT gears, but I am willing to bet my whole system I can tell them apart, 10 out of 10 times, between 150SE and 600SE.
Jafox's statement is dead on, what's the point of making 150SE if 600SE does the job for less?
Jafox's statement is dead on, what's the point of making 150SE if 600SE does the job for less?