We just used one of these for the 1st time (3160 model) and it has zapped 2 Episode amplifiers. When hooking up a multimeter, it is displaying 2 ohms. It is a 4 ohm speaker but that seems very low and might explain why it has killed 2 amplifiers.

Anyone know if that reading seems abnormal? I don't have another unit to test at the moment.

Thanks in advance