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Even BIGGER than Bigger, Badder BIB...
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Old 15th September 2019, 03:13 AM   #91
CraigSu is offline CraigSu  United States
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Actually, it needs to be seriously mass loaded, not as much as this alum. horn, but as a general rule make it at least twice as heavy
Would applying a heavy layer of Mortite to the back of the waveguide be sufficient?
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Old 15th September 2019, 05:10 AM   #92
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You would want to cover it all plus ideally lock it in a damped brace back at the motor, though most folks do it at the throat. FWIW, constrained layer damping is my preference and easily done by applying a foil backed rubberized tape for weatherproof flashing [may take two layers]: https://www.homedepot.com/p/Nashua-T...B&gclsrc=aw.ds

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Old 15th September 2019, 09:09 PM   #93
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Default Stuffed And Braced

Moar progress!
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Old 15th September 2019, 10:58 PM   #94
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Hmm, not sure that's sufficient for a prosound 15"; at the very least I'd 'X' brace the mouth, i.e. notch what you have and notch another cross brace to interlock them, tie all four sides together. Also, run a full panel vertically down the initial expansion or at least a bunch of scrap tied together to create a rigid framework.

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Old 21st September 2019, 10:40 PM   #95
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Default DONE!

Letting the glue dry a bit before trying them with a boombox.
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Old 21st September 2019, 11:35 PM   #96
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Did you have to put a 'bump' in the divider panel for the horn?

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Old 22nd September 2019, 12:12 AM   #97
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Did you have to put a 'bump' in the divider panel for the horn?

GM
Sorry, I'm not sure what you mean. I've currently got them running with a cheap chi-fi amp in the garage, they are deceptively loud. They don't sound loud until you try to talk and you find yourself yelling.
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Old 22nd September 2019, 12:21 AM   #98
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Oh, now I think I get it. No, the horn and the woofer both fit in perfectly with no modifications.
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Old 22nd September 2019, 01:29 AM   #99
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Cool! This the horn? QSC PL-000446GP Replacement Waveguide Horn for HPR152i 2-Bolt

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Old 22nd September 2019, 01:32 AM   #100
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I've currently got them running with a cheap chi-fi amp in the garage, they are deceptively loud. They don't sound loud until you try to talk and you find yourself yelling.
Yup! Loud is Beautiful if it's Clean!

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