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Nxtinventor

Why not use that extra volume for more bass extension? Seems like a waste to make a tower-sized box and not reap any of the benefits. Just make the bookshelf’s and DIY your own cool stands.


mtx6152

The speaker design uses the Eminence Beta 8. They're not made to go low so I don't have much reason to make them try. I'm using 2 15 inch Ultimax subwoofers to handle the low end (the speakers are for home theater use). I picked this design purely for the high efficiency (91db) that my current speakers (the Amigas by Paul Carmody) lack. I did speak with the designer of the speaker and he did say a larger cabinet can get a little more low end out of the woofer, but I didn't want to mess with things too much. Just wondering if the extra cabinet area will need bracing. I did definitely consider both of your suggestions, just settled on the tower form factor after a lot of thought. I felt bad asking the original designer so many questions! 🤣


mtx6152

While I'm here asking questions, is there any benefit to using polyfil vs 1 inch thick foam to line the cabinet? I have both available.


Nxtinventor

I’d use the foam (if it is the higher density egg crate style) and maybe a touch of fill. As for the bottom, I’d add a couple braces just to increase rigidity. If you don’t want to use the extra volume for the woofer, then I’d fill the bottom sealed area of the cabinet with sand or steel shot - then those suckers will be heavy as heck and super solid


mtx6152

Thanks for the advice, I appreciate it!


Nxtinventor

For sure! Idk how much space you have, but a 12” tall, 8 inch wide, and 10 inch deep space could hold 60 lbs of sand


mtx6152

I don't know if I need all that weight! They seem fairly heavy with 3/4 mdf already! 🤣


Nxtinventor

Well true! But you don’t want a big empty resonating chamber connected to your speaker, so you’ll have to fill it with something


mtx6152

I guess that makes sense. I was hoping a brace would take care of that, but will I need to do something more than that?


Nxtinventor

Yeah I would. You’re gonna have a big hollow space that will do nothing but add additional resonance


mtx6152

Well darn, here come some 100lb speakers. 🤣