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Re: If you ... [message #23956 is a reply to message #23955] Sun, 09 September 2007 12:25 Go to previous messageGo to next message
Rick Craig is currently offline  Rick Craig
Messages: 115
Registered: May 2009
Viscount
I would place the ribbon to the side so you have the option of adding more ribbons when your budget allows.

Re: If you ... [message #23957 is a reply to message #23956] Sun, 09 September 2007 13:20 Go to previous messageGo to next message
Danse is currently offline  Danse
Messages: 8
Registered: May 2009
Esquire
What would the other benifits be of adding more ribbons outside of having you locked in the sitting position?
In your opinion would be better 1 center Fountek Cd2, or 8 Dayton PT2C?
From what I understood you were looking for possible lower cost opions. Needles also have a smaller footprint, that may be appealing to some.

Your thoughts?


Re: If you ... [message #23958 is a reply to message #23957] Sun, 09 September 2007 19:40 Go to previous messageGo to next message
Rick Craig is currently offline  Rick Craig
Messages: 115
Registered: May 2009
Viscount
If it were me I would prefer eight PT2C's over a single Fountek because it would be a true array. It also gives you better vertical coverage in addition to the smoother power response.

ART Arrays [message #23961 is a reply to message #23918] Tue, 18 September 2007 08:43 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

Have you seen Fred Thompson's ART Array design? A pair of them costs $350.00 to build.




Re: ART Arrays [message #23962 is a reply to message #23961] Tue, 18 September 2007 09:22 Go to previous messageGo to next message
Rick Craig is currently offline  Rick Craig
Messages: 115
Registered: May 2009
Viscount
Yes I've seen Fred's design. I've designed "quasi-arrays" with a single ribbon tweeter but prefer to have a line of planar or ribbon drivers.

Re: ART Arrays [message #23964 is a reply to message #23962] Tue, 18 September 2007 09:49 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

I can understand that. But to me, the biggest advantage of arrays for home hifi is the reduction of floor bounce, which is accomplished with the midwoofer array. Using a single tweeter is a cost saver. I think Fred would say that more expensive arrays can be made with definite advantages, but I think he feels his ART Array design is a good one for the money. It clearly measured well.


Re: ART Arrays [message #23967 is a reply to message #23964] Tue, 18 September 2007 10:47 Go to previous messageGo to next message
Rick Craig is currently offline  Rick Craig
Messages: 115
Registered: May 2009
Viscount
It's really about tradeoffs and unfortunately the extra drivers can make for an expensive project.

Ribbons vs domes [message #23969 is a reply to message #23946] Sat, 22 September 2007 05:44 Go to previous messageGo to next message
Marlboro
Messages: 403
Registered: May 2009
Illuminati (1st Degree)
"The use of planars or ribbons is better for the following reasons:

1) better sensitivity

2) lower interference patterns in the vertical plane

3) can be operated at a lower crossover point than the small neo dome tweeters"

1. 30 dome tweeters have a sensitivity of 106 db. That's pretty high. 8 planar Daytons will come in at 105. So that's a wash.

2. Theoretically this is certainly true. Sonically, I'm not entirely sure that its audible. I've not been able to find any research suggesting that its a viable concern. Certainly neither the Pipe Dreams people nor the McIntosh people have been concerned about this enough to switch to ribbons.

3. Operating at a lower crossover point is an important consideration: IF YOU ARE USING 6-7 INCH MID RANGE SPEAKERS. For off axis performance,and for the ability to adequately handle the frequencies between 1200 and 3000, having a lower crossover is very important. However if your mid range units are 3 inchers, then off axis performance is less of an issue(especially in you average living rooms anyhow) and coverage in the upper midrange is already assured.

------

A three way line array using (per side) 30 c-to-c .9 inch dome tweeters, 17 - 23 three inch cone mid ranges, and one 12 inch woofer is a viable way to get high sensitivity, and quality sound without using ribbon or planar speakers. It all twists on the mid ranges. If you use 6-7 inch mid ranges then you have to use ribbon/planars.

Marlboro




Re: Just a restatement of what I said about the McIntosh [message #24041 is a reply to message #23947] Wed, 28 November 2007 11:31 Go to previous message
JPH is currently offline  JPH
Messages: 20
Registered: May 2009
Chancellor
Jim
I'm thinking of building a pair of arrays like the XTR 28 .
When you look closely at the XTR 28 you find out that the tweeters are spaced by at least one inch wich makes the c to c about 2 inches wich is a source of combing problem ? could you explain?
What would be a good candidate midrange to the aurasound 1" tweeter in a price range that would match the tweeter in quality ?
As for the woofers I already own 4 12" peerless that I would use from 120 Hz down .
JP

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