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Thanks. I don't have any way to measure them accurately, but I suspect they don't have adequate base alone. They do sound great with a subwoofer.
Tinkerer, thanks for the comment. You are absolutely right. As I mentioned above, and in the body of my ible, Metal alone does not make a good speaker enclosure. And it would not be practical to try to make a compound curve with MDF. This is why the inside of the steel side panels are covered with two layers of sound deadening material glued in place with thick mastic adhesive, as well as being braced internally with MDF cross braces, and then stuffed with long-fiber wool. I can't say they are 100 % acoustically dead, but I can't detect any resonance or distortion contributed by the enclosure. And yes, they sound great! (Never say never) Cheers!
I neglected to mention the bracing on the inside of the steel walls. The ideal speaker enclosure will be acoustically dead so as not to contribute any vibration, standing waves, or other distortion. And the thin metal (16ga in this case) will certainly want to vibrate. So I cut two pieces of MDF as cross braces from wall to opposite wall, and glued them in place. They will of course have to be shaped to reach most of the side panels, and will end up looking something like the Batman logo. Use your imagination. You want to brace as much of the sides as possible. Hope this helps!
High Performance Audio Monitors
High Performance Audio Moni...View Instructable »
You're welcome, anaru. Let me know if I can help, my e-mail is toward the bottom.
Yep, got the shroud with the fan, but had to remove it due to lack of space. The fan is more than sufficiently effective as is. Thanks for the comment, though.
Solar HothouseView Instructable »
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