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Old 23rd July 2015, 04:36 PM   #1
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Join Date: Mar 2004
Location: Trenton,On, Canada
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Default Raal+scanspeak revelator

I've build an monitor as this:

Raal 70-10 ribbon crossed 4th LR @ 2600. (92dB, I like this ribbon better than dome)

scan speak 18w8531 (87dB revelator serie) 4th LR @2600

Box is sealed (dayton 35 liters enclosure, wich I can improve on the floorstander MKII version)

and my F3 is about 60 (at my listening seat).

I use an active DSP and a 800Watts class AB amp to feed 2 18inche infinite baffle and I'm doing EQ flat to 15h.

the monitor are powered by a class A amplifier and the signal doesn't pass by the miniDSP crossover as the sound degrade a bit too much for my like.

as-is, the sound is great and the detail,dynamic are just hard to believe.

But I do feel that when I crank it up, it does feel a bit congested as the 18w move a lot and I imagine I hit some power compression at this point...

I do not have a high pass on the monitor, I may add a 1st order capacitor on the 18W but would need to buy a big film cap and sound may deteriorate quite a bit too.

I want to do something about that.

Again, because of my sub, I only aim a low frequency of 70hz, lower is just gravy.

Here my 2 options and would like your input on it. (cost non issue).

-but a 2nd set of 18W8531 and either to a MTM or TMM design sealed with about 0.55 QTC. (sensibility would match the tweeter better as well as I would reach 90dB.)

-go 3 ways and buy a pair of of 12cm cm midrange revelator (open to illuminator if you say they are worth it but nobody seem to have experience on the 12CM version).

What are your take between the 2?
I can't understand it. I can't even understand the people who can understand it.
- Queen Juliana

Last edited by etalon90; 23rd July 2015 at 04:38 PM.
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