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Parts Express. They are impressive. It is going to be fun to expreriment with the tapped horn. If that fails there is always a Lab 12 horn in them or maybe a straight horn in the attic which might be easier to build and take up less floor space. Except in the attic I guess you would have to figure out a way to keep the temperature down to a reasonablew level. My attic temp goes up to over 150 in the summer. I live in a relative benign climate.
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people that monitors attic temps. I live in san Jose Ca where local ambient is nice. I regualarly record attic temps above 150 degrees F during the summer. I am not putting any of my drivers in that enviroment. If I were to go with the attic horm it would have to be with a power vented rear cavity for the drivers. I have been chasing thermal problems from gas turbines hot sections to nuclear core cooling for 40 years so I realixe the problem.
Good to see someone else building a tapped horn...I think you will like it. Keep us posted on your progress.If mounted in the attic,I would think a roll or two of fiberglass insulation covering the horn should work well.
If you have access to your attic, how about infinite baffle?By the way, one good way to keep summertime temps down in the attic is to use a good ventilation fan for air flow.
The disadvantage to infinite baffle in an attic is that the sound will carry outside...NAF(neighbor acceptance factor)very low...:-(Here's a link to a ventilation fan that should work quite well.
http://www.eminent-tech.com/howitworks.htm
For those who are hospitalized or incarcerated and have enough time on their hands to read it thoroughly, the review of this device by J. Peter Montcrieff is required reading. It can be found by following the links on the ET site.Montcrieff makes the case that it is so superior to all other subwoofers that it renders them nearly useless by comparison. I spoke with Bruce Thigpen at CES 2006 about his invention and came away mightily impressed even though the TRW-17 was on silent display due to the concerns of show management.
I like big a** front loaded horn subwoofers a lot, though they don't extend down to DC!
That "fan" will eliminate the heat build-up AND eliminate "the neighbor problem." In fact, it will probably eliminate the whole neighborhood! It's earthquake time -- let 'er rip and hang on tight!
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