DANGERDAN Posted August 22, 2011 Author Share Posted August 22, 2011 Thanks for the info pite, its actually a better thing that its not as big as it states as it is better for the auditory of the sound reproduction, for me anything above 8" will result in more difficult reproduction of mid frequencys. Quote Link to comment Share on other sites More sharing options...
pite Posted August 22, 2011 Share Posted August 22, 2011 Good Point! [] Quote Link to comment Share on other sites More sharing options...
DANGERDAN Posted August 23, 2011 Author Share Posted August 23, 2011 Well it makes sense doesn't it, i was always a bit skeptical about the rf7's with 10" because 10-12 are usually sizes for subwoofers which are specifically designed to more naturally reproduce frequencys below the 100hz mark, so this makes more sense now id say. Quote Link to comment Share on other sites More sharing options...
DrWho Posted August 23, 2011 Share Posted August 23, 2011 For as long as I can remember, driver sizes have always been measured by the basket diameter. For what it's worth, here are two things to consider when talking about the size of direct radiators: 1) Cone Breakup 2) Polar Response If you're going to xover at 1kHz, then you actually need a 15" woofer for the polars to line up with a 90x60 tweeter horn. A dual 10" array (like the RF7) works pretty well in the vertical, but it's gonna be a bit wide in the horizontal. Cone breakup is a function of cone stiffness and the size of the driver. Getting a 15" woofer to play up to 1kHz is actually pretty hard to do while maintaining low distortion and good efficiency. It's my understanding that the better drivers will have stiffer cones, which means extra weight, and so that is compensated with an even stronger motor (tigher gap, more windings, different magnets, etc...). So even though there are a lot of 10" and 12" subwoofer on the market - I personally consider them way undersized for the application, and I would even suggest going as high as 1kHz with a 15"... Quote Link to comment Share on other sites More sharing options...
DANGERDAN Posted August 23, 2011 Author Share Posted August 23, 2011 So even though there are a lot of 10" and 12" subwoofer on the market - I personally consider them way undersized for the application, and I would even suggest going as high as 1kHz with a 15"... Errr what, i wouldnt say you would need to go bigger than a 12" unless you were wanting to go louder but other than that the 10-12" is probably the most natural way for a speaker and enclosure to reproduce sounds of 100hz and below. And how would you recommnd a 15" to go as high as 1khz, at least for a sub thats designed for sub frequencys ??. From what i know each driver size paired with component design has its own resonant frequency range and thats why floorstanders have mutliple sized drivers for each frequency spectrum it works for. Edit. I think im thinking too narrow. Quote Link to comment Share on other sites More sharing options...
pite Posted August 23, 2011 Share Posted August 23, 2011 So even though there are a lot of 10" and 12" subwoofer on the market - I personally consider them way undersized for the application, and I would even suggest going as high as 1kHz with a 15"... Errr what, i wouldnt say you would need to go bigger than a 12" unless you were wanting to go louder but other than that the 10-12" is probably the most natural way for a speaker and enclosure to reproduce sounds of 100hz and below. And how would you recommnd a 15" to go as high as 1khz, at least for a sub thats designed for sub frequencys ??. From what i know each driver size paired with component design has its own resonant frequency range and thats why floorstanders have mutliple sized drivers for each frequency spectrum it works for. Edit. I think im thinking too narrow. For a given price range, RF-7 II with their two 10" Cerametallic drivers and 1.75" Titanium Horn driver, I'm one very happy soul with their peformance and sweet sound. [Y] Quote Link to comment Share on other sites More sharing options...
Islander Posted August 25, 2011 Share Posted August 25, 2011 For RF-7 II the measurements are as follows, Woofer Cone: 8" dia With Suspension: 9" dia (With Suspension Frame: 9.5") With Basket Frame: 10.5" dia Oh well, I knew that the 'woofer cone' is not going to be true 10" in diameter when we bought it... Sounds like 10" speakers to me. These are speakers, not car tires. Speakers are measured across the largest diameter of the frame. Quote Link to comment Share on other sites More sharing options...
Don Richard Posted August 25, 2011 Share Posted August 25, 2011 It's been like this for a long time. A 15 inch driver has a 13.5 inch cone, for example. Done like that so one will know what fits in the box. Quote Link to comment Share on other sites More sharing options...
pite Posted August 25, 2011 Share Posted August 25, 2011 Yes, they are not 'car tires'! haha, funny!!! Quote Link to comment Share on other sites More sharing options...
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