Originally Posted by
Harvey Gerst
The 130A woofer had a copper voice coil, a paper* dome, and a paper* surround. As long as the paper* is not exposed to heat and sunlight, it should not dry out enough to crack. The viscous "goop" helps prevent dying out, although it was first used on the D123 to prevent drying out and venting thru the cloth surround.
* It would probably be more accurate to say pulp instead of paper when referring to speaker cones, domes, and surrounds.
As far as power handling, JBL's of that period are known for their efficiency, and they can get pretty loud with just a few watts. They should also have no problems dealing with a 30 to 100 watt power amp as long as you don't run the amps to where you hear clipping (and, of course, avoid subsonic thumps and HF oscillations).