Quote:
noah katz wrote:
 "And actually it doesn't matter that much because at high output levels voice coil heats up really fast. I remember Dan Wiggins quoting that the VC in AA Tumult takes around 2 seconds to go above 200 deg. C with 1000W input power. So it doesn't matter that much whether the starting temperature is 30 C or 60 C."
Good point.
I've quoted that same thing from Dan several times when people start talking about the continuous power capacity of some subwoofer.
"Actually the heated up air inside the enclosure is a bigger problem. ♠"
Yes. I wonder why more car audio subs don't burst into flames with a kW or two being fed into a small, sealed, well-insulated box.
Maybe the crest factor is high enough that the average power isn't nearly so high.
Or maybe they do; I don't follow car audio, I've just read references to what they're up to. |
Hi Noah,
The high power boxes don't burst into flames for the same reason the drivers heat up so fast. Most drivers are very in-efficient at radiating heat away from the voice coil. You can't heat up the enclosure unless there is a good means of transferring the heat out of the VC. Over time you can heat things up in pro use where averages are high, but with typical crest factors, a dark colored subwoofer sitting in the shade vs sun for extended time probably has a greater impact.
PS - It looks like I might make it out your way again late September.