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Old 25th September 2012, 01:15 AM   #1
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Default SB Acoustics Satori Monitor

I am designing a two way monitor for SB Acoustics that will eventually lead to a full documented Kit. This thread will show how i work from unpacking the drivers to measuring them, constructing the crossover and the cabinet.
When the speaker is ready it would also like to discuss the subjective impressions how they sound.
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Old 25th September 2012, 01:23 AM   #2
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The drivers came well packed and presented, full intact. The woofers are 6 1/2 " and on the market since some month. The tweeter is brand new. When i unpacked them, there was some protection silk over the membrane. when i took it away i saw why. They are so new that the membrane was still a bit sticky from the coating but not so much as to collect dust.
Attached Images
File Type: jpg Satori packed.jpg (388.4 KB, 6917 views)
File Type: jpg Satori Tweeter.jpg (519.7 KB, 6240 views)
File Type: jpg Satori Silk.jpg (275.9 KB, 5652 views)
File Type: jpg Satori Woofer.jpg (576.5 KB, 5481 views)
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Old 25th September 2012, 01:44 AM   #3
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Here is the preliminary data sheet of the woofer. I chose the 4 Ohm version though, partly to give the monitor a somewhat higher voltage sensitivity so i can use a smaller value resistor before the tweeter.
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Old 25th September 2012, 01:46 AM   #4
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SB Acoustics :: 6 1/2'' SATORI MW16R
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Old 25th September 2012, 01:47 AM   #5
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Here is the tweeter :SB Acoustics :: SATORI TW29R - OFF
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Old 25th September 2012, 12:52 PM   #6
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Interestint to know how do you match the xover for different sensibilities & nominal impedances, suscribed to your thread.
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Old 25th September 2012, 01:04 PM   #7
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Interesting Drivers Joachim! I'd not seen these ones before. I've got some SB12MNRX25-4's and am most impressed with the build quality and the closeness to factory specs! Unfortunately a house purchase and renovation has got in the way of completing that project for the time being. I will be very interested to follow this thread!

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Old 25th September 2012, 01:07 PM   #8
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Thanks. Yes, this drivers are made very well. I was told by the management that SB delivers raw parts to a lot of prestigious brands so they have an advantage here.
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Old 25th September 2012, 01:17 PM   #9
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I will make my own impedance measurements today.
One first commend : The cones of the mid woofer are trumped shaped and from a paper material that contains papyrus fibers. That makes the cones very stiff. Together with the impedance compensation that results in a very extended bandwidth up to 10kHz, as good as many wide band drivers. There is a small hole in the response at ca.1.3kHz. That comes from the very low mechanical damping of the rubber surround. It would be easy to take that away by using a high damping surround or edge coating but that would have increased mechanical losses. It was decided that good dynamic behavior is more important then a small and benign hole in the response. I will measure the units i have here of cause. The data sheet is only priliminary and i am using the 4 Ohm version that may behave differently.
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Old 25th September 2012, 01:43 PM   #10
_henry_ is offline _henry_  Australia
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looking forward for your build joachim.

cheers
henry
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