Hi all,
I’ve had a pair Lab12 failure that I’m a little curious about the cause (first failures I’ve had in 18 months of using them). One driver still looks as good as the day it was loaded, but there is no continuity across the inout terminals (tried meassuring where the leadin wires reach the cone), Foam surround is ok, cone is ok, spider is ok, lead in wires look ok , voicecoil looks ok (as far as can be seen looking through the vents above the magnet, same colour as when new) and doesn’t rub when moved by hand.
It’s partner doesn’t look so good, foam surround had a 1” rip in it where it meets the paper cone (rip follows the join with the cone) and the voicecoil separated around the top where it meets the cone. Though the voice coil isn’t burn and still has continuity across it (removed the dust caps and metered the ends of the broken wires and read 4.5ohm). I’m guessing this is likely over excursion damage due to its partner failing (Signal was high passed at 38Hz with a BSS Omnidrive processor)?
Can anyone familiar with the way these fail offer any advice or comment, do the failure points of the drivers indicate any particular cause and which driver died first?
Also vaguely related: Has anyone tried modelling a Labhorn with “Ciare 12.00 SW” drivers, yes I’m aware these aren’t the intended drivers etcetc, but I’m interested to see how they behave in the Horn, a college had a pair sitting there collecting dust today so we tried popping them in while the cab was empty and they certainly provided similar results to the Lab12 loaded boxes to our ears for the 5 minutes we tried them, thus just curious…….
M