Originally Posted by LTD02
unless you can demonstrate it, people aren't going to believe how important power compression is. voice coils can reach a couple hundred degrees pretty quickly at which point the resistance causes a loss in efficiency, but the thiele small parameters also get all screwed up and so the frequency response changes. you could have lots of good marketing points, but i still think that the onus is on you to demonstrate how these things matter.
good luck with the 'cool' design.
I appreciate the encouragement.
I think there is some confusion as to my status as a DIY sub enthusiast. As a home builder, I get involved somewhat in installing multi channel audio and sometimes I use subwoofers that I build, but I'm not the least bit interested in mass producing subwoofers commercially.
I incorporated Point One Technologies years back to keep patent applications, trademarks and HT installs under a separate entity. The cooling system falls into the same category as single digit reproduction. I talk about what I know to be valid points regarding a few things I've experienced and fleshed out somewhat.
People who buy subwoofers from me are local and it's always a case of someone seeing them, hearing them and then saying 'I want one of these!' That comes, no doubt, from the fact that I pay more than the usual attention to detail than most (including commercial subwoofer companies), not from the fact that I actively seek buyers for what I build.
Honestly, I only decided to post some details about what I call ThruVent Cooling because so many people have asked me to. Posting all of the details would be kinda a dumb thing to do, IMO.
ID subwoofer companies are all of the philosophy that form follows function and they market 'bang for the buck' products. IMO, you don't even get that. Ilkka decided to measure some fairly crude DIY subwoofers (no offense to the builders of those subs, but a raw mdf cube with a driver bolted into it driven by a generic pro sound amp is fairly crude, IMO), and they top the list of all of the subwoofers he's measured in every category he measures for.
If I ever do decide to make my subs commercially available, I would definitely aim at the high end of the market and marketing will then become very important to me, along with any sort of onus that goes with the territory.
This is just my DIY thread (only my second such thread in the 6 years I've been a member here) that shows a recent build of 4 subs (2 of them are not finished yet), and will show some graphs and other results, like every other DIY sub build thread.