Originally Posted by
moldyoldy
Improved materials extend performance life, but eventual sag is inevitable as long as we use suspension materials that weaken with time and use. Somebody needs to invent a linear, mag-lev, variable-compliance suspension. ;)
No, DON'T hook a battery to the speaker, merely attach a short wire across both terminals for transit. We think of speakers turning voltage into cone motion, but they can do the reverse as well, movement of the coil will produce a small, but measureable voltage, called 'back EMF'. Shorting this voltage out with a jumper wire for shipping "damps" the cone motion, though it doesn't prevent it entirely. It's also something most people never do. If you're a worrier, it's an easy task that might let you rest easier.