If anyone wants the Mdf lab 12 20hz horn I built, and you're near NYC, come grab it, it's yours. No driver inside.
Do you have the final plans, dimentioned drawings, etc. for that cabinet?
If so, I would very much like to have them.
Thank you. I wasn't sure if, over the life of the thread, some adjustments were made.
Jim,
Output level really depends on the room, but the cabinet should be capable of around 119 dB (116 at 20 Hz) with 400 watts at one meter.
Yep, exact same cabinet.
The sim is here.
I'll have to dig around and see if I can find my measurements.
Edit: Before and after EQ are here.
The decibel scale is off a little. It was loud enough to seem like it was threatening the structural integrity of the room, though. I believe when I made those measurements they were sitting in the back corners of the room, mouth facing up.
In fact, let me see if I can do one better..
Yeah, they were kinda like this.
And sometimes like this after a few drinks.
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I'm surprised the liquor wasn't dancing of the shelves!
I was actually referring to the simulation you posted though. Your simulation showed 125 db at .5 x pi which is three adjacent walls (ie corner loaded) if I'm not mistaken. Either way it's still freaking loud!
Note that HR's 1.0, 0.5pi boundary loading is unrealistically optimistic for most HIFI/HT apps since no construction losses are accounted for, so best to use 2.0, 1.0pi for a more realistic wall/floor, corner loading sim and if your speaker measure better than predicted, so much the better overall WRT dynamic headroom, driver mechanical stress, onset of audible ditortion.
GM
GM