Originally Posted by
mech986
Hi,
I went to check some JBL drivers with a meter but didn't have a signal/amp source to drive them to make sound (idiotically forgot). The drivers' history suggests they may have suffered some kind of damage in the past but hard to tell obviously externally. They measured DCR's in the 6.5 to 6.9 range for 8 ohm drivers (I know some JBL drivers which purportedly are 16 ohm also measure DCR this low too).
For a woofer, free movement and this measurement should mean an operational driver?
For a mid comp driver or tweeter, same assumption? That would be much harder to tell I suppose.
I suppose always could have a buckled or misshapened voice coil without it shorting or going open.
So without a signal or sweep source, what are my chances of the drivers being ok, let alone good. This assumes whatever state they're in now, they're still at least 20 years old and may need diaphragm replacement to be perfect.
Thanks for the reply.
Regards,
Bart