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| Re: What'cha gunna build, Patrick? [message #39981 is a reply to message #39966] |
Tue, 21 January 2003 12:35   |
Patrick Kopson
Messages: 26
Registered: May 2009
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Chancellor |
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I completed (not finished because the cabinets are bare MDF--not even sanded yet) my 2 Pi's a few days ago. The tonal balance is off as described in the "piezo shout" thread above. To me, a complete newbie, the Delta 12-LF's high frequency roll-off looks like a better match to the 1038 than the Alpha 10-A's. Also the Alpha 10-A has a hump between 1K and 4K, whereas the Delta 12-LF has a smaller hump between 2K and 3K. So I thought I might try a cross between a Studio 2 and a Theater 3. But I will try slightly attenuating the 1038's and damping there plastic horns first.
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| Re: What'cha gunna build, Patrick? [message #39983 is a reply to message #39981] |
Tue, 21 January 2003 15:01 |
Garland
Messages: 269
Registered: May 2009
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Grand Master |
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What did you use for damping in the cabinet? Like my Theater 4's, the 2 Pi's I built 6 months ago have a 1/2" layer of felt carpet pad under poly 1 1/2" poly batting lining three sides of the cabinet. These 2's don't sound "broken" but they are on the bright side which is good with many of my older jazz recordings which are often pretty weak in the treble. Please report back on the effects of damping the horn. Thanks and hope to see you at some listening session soon! G.
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| Re: FWIW, here's what I did.... [message #39986 is a reply to message #39981] |
Tue, 21 January 2003 18:22 |
Matts
Messages: 359
Registered: May 2009
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Grand Master |
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Patrick- when I built my 2Pi's, I used the full thickness of R13 fibreglass insulation on three walls and used the recommended inductor, although the inductor affects the Alpha 10. They sound good. I also damped my tweeter "horn" later, just for the heck of it cause I had some extra Xtreme Dynamat, and it helped tighten up the bass and mids, to my surprise, and didn't really affect the high notes. Good Luck! Matts
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