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Amazing, as seems to be your norm.Listening impressions?Efficiency?Low end extension?
Price?That is a big ribbon. What is the thought behind the use of such a big ribbon tweeter? Power handling and lower crossover point ? What about the vertical dispersion issues you spoke of before?
$3500/pr. including shipping.
The RAAL ribbon comes with foam diffusors to shorten the effective length of the ribbon. They work exceptionally well to make the vertical coverage very smooth. The longer ribbon also allows for a lower crossover point.
Quote from: Rick Craig on 7 Feb 2009, 01:25 amThe RAAL ribbon comes with foam diffusors to shorten the effective length of the ribbon. They work exceptionally well to make the vertical coverage very smooth. The longer ribbon also allows for a lower crossover point.Hi RickBeautiful speakers - congratulations!How would you characterize the difference in sound between the Fountek CDM2.0 and the Raal tweeters?RegardsJose
For this format the RAAL is the better choice because of how it's designed. I believe you have arrays, right?
Quote from: Rick Craig on 7 Feb 2009, 05:04 pmFor this format the RAAL is the better choice because of how it's designed. I believe you have arrays, right?Yes, I have arrays with Eton 5.5" and Founteks with corner woofers and subs. All digital crossovers with Tact amps and room correction. I use a steep crossover point of 2500 or 2600 and find that the Founteks can sound a bit harsh if pushed at this frequency. The Raals would probably work better Jose
How low can it be crossed? Alex's data sheet claims 1600hz, but wanted to know your opinion?Best,Chris
I think the RAAL drivers would be better in an array but I've not tried that and it would be significantly more expensive. The Founteks can be crossed lower than 2.5K if the DSP unit crossover / correction is capable. With the TacT I think you're limited to a higher crossover point because of how the DSP is applied. The measurements you take to import into the DSP are also critical.
Quote from: Rick Craig on 8 Feb 2009, 02:24 amI think the RAAL drivers would be better in an array but I've not tried that and it would be significantly more expensive. The Founteks can be crossed lower than 2.5K if the DSP unit crossover / correction is capable. With the TacT I think you're limited to a higher crossover point because of how the DSP is applied. The measurements you take to import into the DSP are also critical.Hi RickThanks for the reply.I don't think that the problem is in the Tact units. The crossover points and slopes in my Boz Tact units are totally flexible and I have thus been able to play around a lot with delays and crossovers. I do all my measurements at the listening position which will of course be slightly different to measurements done close to the speakers. I have however found that if I cross the Founteks below about 2400Hz, even with steep slopes, some tracks can sound a bit harsh and the "problem area" seems to be at about 2200-2400 Hz. With the Tact room correction one can put in a bit of a dip in the target curve at these frequencies and this resolves the harshness. Perhaps the measurements of the Founteks at the zaphaudio site allude to this - he shows that the THD of the Founteks starts to rise quite a bit below about 2400Hz http://www.zaphaudio.com/nondomes/standard.htmlI have been toying with a super line array using the Raals and probably Scan Illuminator 6.5" woofers in an open baffle but, as you say, the drivers are very expensive particularly when used in an array. RegardsJose
Yes, I've had arrays set up with the TacT system. One thing that led me to purchasing a DEQX over the TacT was that it applies driver correction before the crossover. I do agree that there can be hardness if you cross too low and / or with a slope that's too shallow.
