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Re: Pi 7 frequency response - HF [message #50992 is a reply to message #50989]

Mon, 23 April 2007 12:14

Tim Barnes
Messages: 46
Registered: May 2009

Baron

Hey, thanks for joining the discussion. I had a look at the Selenium part and it seems to have a broader frequency response than the 2002. My inclination is to build the system as Wayne has designed it, and then start on modifications if I either hear something I don't like, or (more likely) just can't help myself

I was surprised to see how much tweeters beam at high frequencies - I'm not sure I really notice it with my current dome tweeter, so I'm guessing that as Wayne suggests, it's not a huge issue.

It's interesting that in the latest incarnation of the Linkwitz Orion, he's added a rear-firing tweeter, and feels it makes a worthwhile difference.

tim

Linkwitz Orion++

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Re: Pi 7 frequency response - HF [message #50993 is a reply to message #50992]

Mon, 23 April 2007 12:19

Matts
Messages: 359
Registered: May 2009

Grand Master

I think if you build it as Wayne suggests you'll be satisfied with the treble based on your listening experience; I have been with 2002 in Stage 4's. I have planned on upgrading comp driver, but somehow haven't got around to it for a few years.... However, there is a mischevious part of the brain that wants to accept marketing or conventional wisdom, or whatever as "reality," and every once in a while that part wants to add some kind of supertweeter or whatever.... But when I listen to speakers that have them, I think it's too 'etched' or 'artificial' sounding and get over it. At any rate, it's fun too play with.

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Re: Pi 7 frequency response - HF [message #50994 is a reply to message #50993]

Mon, 23 April 2007 12:36

Tim Barnes
Messages: 46
Registered: May 2009

Baron

That's what I suspected. In any case, my hearing is probably well rolled off at 15KHz...

I'm going to try some experiments with test tones, walking around my current speakers to see how obvious the beaming effects are.

tim

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Re: Pi 7 frequency response - Splendid! [message #50998 is a reply to message #50991]

Mon, 23 April 2007 15:24

Wayne Parham
Messages: 18792
Registered: January 2001

Illuminati (33rd Degree)

Check the published response of Vifa tweeters. You'll notice they show response curves on-axis as well as two or three off-axis curves.

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Re: Pi 7 frequency response - HF [message #50999 is a reply to message #50994]

Mon, 23 April 2007 15:27

Wayne Parham
Messages: 18792
Registered: January 2001

Illuminati (33rd Degree)

Try different tweeters too, and when using compression horns, try different flares. Many have different polar response.

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Re: Pi 7 frequency response - HF [message #51026 is a reply to message #50999]

Fri, 27 April 2007 14:21

Tim Barnes
Messages: 46
Registered: May 2009

Baron

Hmm. The main thing I discovered from listening to test tones on my Theil CS3.6s is that I can't hear anything above 15KHz at all. Perhaps I should de-wax my ears? My 11 year old can hear all the test tones up to 20KHz, although they were warble tones off the Stereophile Test CD 3, and perhaps he was hearing the warbles. I couldn't hear anything at all for the last few samples.

Perhaps this is also why I've never found CD players to be as objectionable as some do? Although I do find CDs less interesting and involving than LPs.

tim

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