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Old 26th May 2003, 09:34 PM   #11
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Thanks for the encouragment with the HDS woofers. The little sensitivity peak at 4khz I think can be fixed by crossing over a little early (use components for 3K knowing the peak will move reponse XO to about 4K). The build quality looks great (only time will tell).
I dumped the D26 idea before I bought the Peerless 811815. My most promising prospect is now the Vifa D27TG-05-06. The paper response curve looks totally clean from 2k to 20k with 1 bd of extra sensitivity over the 850439's.
My last speakers were the same type of match and the only crossover tweak that offered improved sound was removing the 2ohm resister to pad the tweeter. I liked the extra bd of brightness.
The Scan Speaks are nice from what I've heard, but a little out of budget for this project and they look like they would need some crossover tweaking. I am a big advocate of simple low order crossovers. I would like to try a series XO, but 4ohm (2 8's in parallel) woofer and 6ohm tweeter.
Thanks to all for your interest and tips.
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Old 26th May 2003, 10:28 PM   #12
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Quote:
Originally posted by Brian Donaldson

I dumped the D26 idea before I bought the Peerless 811815. My most promising prospect is now the Vifa D27TG-05-06. The paper response curve looks totally clean from 2k to 20k with 1 bd of extra sensitivity over the 850439's.


Brian, The D27's may look attractive on paper, but they have roughly twice the distortion as the Peerless tweeters I've measured. I would rather use a Peerless or Morel product vs. the Vifa tweeter you mention.

Scott
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Old 27th May 2003, 02:26 AM   #13
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Hey Scott

I just got back from a weekend near you at Lake Travis.

I'm a little perplexed by the price range in dome tweeters. There doesn't seem to be a big hole in the $30 to $150 range. It makes me wonder what ScanSpeak does that can make their D2905/9900 so expensive. And also why doesn't anyone publish their distortion curves?

My complaint with the Peerless unit was the way is just snaps together. If the thing had a metal face plate with screws holding it to the magnet structure and a $50 price tag I would have bought it, installed it and likely love it. Believe me, I love a bargain, but something rubs me wrong about putting a $17 driver in a $400/Each (materials only) speaker.

I guess I'll order the Vifa's and try both. mayby that's what diy is all about. one will go in these speakers and I'll make some small bookshelf speakers for my daughter or something. She's only four but wants her own stereo. That's my girl


Thanks for your input

Brian
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Old 27th May 2003, 03:18 AM   #14
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How about the Seas t27TFFC?

It is rather flat, and has the diaphram area perfect for a first order XO.

-Paul
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Old 27th May 2003, 09:18 AM   #15
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Quote:
Originally posted by PaulHilgeman
How about the Seas t27TFFC?

It is rather flat, and has the diaphram area perfect for a first order XO.

-Paul

what has the diaphragm area to do with the XO?
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Old 27th May 2003, 03:07 PM   #16
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Generally larger tweeters that have 27mm domes can play lower with less distortion, ie. t27Tffc, Vifa DX25 etc. Smaller tweeters must be crossed both higher and at higher orders. Look at the XT25 from vifa, most people wont go with much below 2500 Hz or 2nd order electrical. Or the OW series.

-Paul Hilgeman
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