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radulescu_paul_mircea

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Posts posted by radulescu_paul_mircea

  1. Hello guys,

    I was triyng to build a pair of Othorns before Christma2s but my plans didn't go that well because it seems I can't find nowhere to buy ( for now) a pair of 21's fron B&C or 18sounds.

    So, now i still want to build a pair of subs and I was looking in other projects. First I saw the Xoc's Th18 and then the Keystone which I like it more because it is easier to build and it kinda looks cool ;)

    When I compared the Spl results from Walter's measurements I saw it can reach around 130 dB/1m GP and has a FR down to 35Hz.same with Th18. Othorn on the other hand goes 8Hz lower and it reached a max Spl of around 137 dB/1 m. Also, on the specs of TH118 from Danley they say it has 137 dB cont. Taking into acount the compression for the driver in the Keystone, at 1800 watts as Walter measured that seems to be a very real, easy to verify value. Also I trust Ricci's measurements so if he says his sub gives that Spl, it does.

    So, now, the questions:

    1. Is the 21sw152 driver that much more powerfull to gain 6 dB more at higher freq than the 18sw115, even if it is tuned 8Hz lower

    2.where does Danley take their nubers from? Because from what i see, the xoc1 design is preety much the same and it has around 6 dB less continous output

    3. Is there a company that takes into account power compressio? Because I can't find any

    4. Which should be better in a small space af around 300sqm beetwen 2 Keystone or 2 Othorn both with 18sw115.

     

     

    Paul

  2. Yes, SI hs24 in a horn would be huge and I don't know if it can withstand a high compress ratio. In a TH the theory sais it would have a +6 dB gain over a ported enclosure. So, yes, it would be huge but also VERY loud.

    But the M-Force has a much stronger diaphragm (the cone for the 40" variant is 4 mm thick) and a huge of a motor, like 25-60 (i don't really know for sure)  times more powerfull, so it could, in theory, be a very powerful midrange driver in a horn :) 0.o 

    The price for the driver with amp module could be at around 4000 $ or more, but what I am trying to find out is what are its limits, what it could do, what are the benefits. If I have space and number limitation and could use maximum 2*3 DSL BC218 (this means 60" by 60" by 90" space limitation/side)  , could it be possible to build something louder that goes deeper?

    It is a discussion here where the bass maniac inside me re-awaken because I've listened to a DSL BC415  and I tought "if there would be a sub with that power AND the low extension of the TH221 in a single box, It would be the clubbing utopia".

     

    http://www.diyaudio.com/forums/subwoofers/268269-powersoft-m-force-specs-now-available-3.html

  3. Hello everyone!

     

    There was a post on Facebook Danley Sound Labs page, where a Caleb speaker was on a truck and I've asked what if he would use the M-force for bass instead of normal drivers (8*30" instead of 12*18" or something like that). Ivan Beaver answered this :

     

    "The M-Force does not lend itself to horn loading-unless they make a few large changes.

     

    And then it would only be good for below 30Hz or so

    It is NOT just the size of the cone-but how it is used that makes the difference"

     

    I have read a lot lately about all kind of speakers and subs and I understand that in a horn,the bigger is not always the better, but I am always fascinated about exaggerated things :D and I was daydreaming about a (very) large TH or FLH with two M-Force and wondering if it would work, what it's specs would be and what would 4-8 of them would do on a large outside club with an olympic size swimming pool and enough space for 4-5k people (around 6000 sq. meters).

    Because on the PS Datasheet of the M-force they specify that he 22" and 30" can be used horn loaded and beacause I am just beginning to learn how to model horns (so i have very little experience to find out myself why it won't work) I am asking you to help me with more information,if you have the time to satisfy my curiosity.

     

    Thanks,

    Paul.

     

    PS: sorry for the bad english :)

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