IEC baffle is a dipole loudspeaker, so there will be one wide dip around 150 Hz (as seen on all pictures).
Dip at 50 Hz and peak below 40 Hz are the same with different drver Fs, so are room related:
http://www.sbacoustics.com/files/4314/9500/2073/4in SB12CACS25-4-graph.png
Dip at 50 Hz and peak below 40 Hz are the same with different drver Fs, so are room related:
http://www.sbacoustics.com/files/4314/9500/2073/4in SB12CACS25-4-graph.png
The reason is quite simple: These ceramics are made by oxidizing aluminium. They produce it like any usual aluminium cone and oxidizing the upper layer of aluminium then, which makes the cones 'automatically' composite layered. Another technique is to 'spray coating' it on, I think it may be named 'vapor deposition' but I'm not sure (sry, not a native speaker) and let it build up that way. So it's not the same as the membranes of the Thiel/Accuton drivers which are, to my knowledge, pure ceramics.
No, it got several constructional advantages. Because the dustcap can be mounted last, it is so much easier to center the voice coil and glue it on, that keeps the tolerances low. And, ofcourse, you can use the same, already existing production lines as for all the other drivers.
It is a ceramic cone or a ceramic coated metal cone ?
The latter. And I pretty much prefer it that way by far. Firstly, the breakup does not happen that explosion-like and secondly something like this can't happen:
Hi,
Looks like the new SB Acoustics ceramic drivers will be used in the new Revel speakers. Revel - Future Products
They call this driver cone "Deep Ceramic Composite (DCC) cone technology".
The 6.5" ceramic driver has a cone break-up mode at ~9kHz, while the pure alu version has it at ~10kHz.
9kHz is good for a driver of this size, but as in the alu version to have it at 10kHz is simply amazing.
SB17CAC35-4
SB17NAC35-4
Regards
/Göran
Looks like the new SB Acoustics ceramic drivers will be used in the new Revel speakers. Revel - Future Products
They call this driver cone "Deep Ceramic Composite (DCC) cone technology".
The 6.5" ceramic driver has a cone break-up mode at ~9kHz, while the pure alu version has it at ~10kHz.
9kHz is good for a driver of this size, but as in the alu version to have it at 10kHz is simply amazing.
SB17CAC35-4
SB17NAC35-4
Regards
/Göran
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Yes, these are hard cone drivers, but look at the distortion plots:
www.audioexcite.com -- SB Acoustics SB17NAC35-4
The break-ups are very well handled and is the best I've seen and measured for a hard cone driver of this size.
Regards
/Göran
I find this one to have nice datas : SB Acoustics :: 5" SATORI MR13P-4<br><font color="#FFFF00">NEW!</font>
150 Hz to 7000 Hz with a LR4 then a serie notch if not enough ?
150 Hz to 7000 Hz with a LR4 then a serie notch if not enough ?
Are the SB17 range all the same below 100hz?(distortionwise)Hi,
Looks like the new SB Acoustics ceramic drivers will be used in the new Revel speakers. Revel - Future Products
They call this driver cone "Deep Ceramic Composite (DCC) cone technology".
The 6.5" ceramic driver has a cone break-up mode at ~9kHz, while the pure alu version has it at ~10kHz.
9kHz is good for a driver of this size, but as in the alu version to have it at 10kHz is simply amazing.
SB17CAC35-4
SB17NAC35-4
Regards
/Göran
Not possible..
But, that is very good THD for 6-7' driver, usually have first distorsion peak around or below 2k..
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Interested in below 100hz as there are differing opinions of various SB17 models. Id assume the motors are identical, just the cones and possibly spiders are different.
You can't call it efficiency because you'd have to measure the power response of the driver. Maybe the cone is some sort of weird configuration that is its own horn, so on-axis the driver is super-sensitive. Then you'd think that the efficiency was very high, but not so - there's no sound energy off axis. So sensitivity works just fine - no need to change it.
I'm sure there are other reasons as well. That's just one example I picked for the sake of contrarianism.
There's a build over on PETT atm with a 6" CAC and ribbon tweet.
Interestingly, the 5" 4 ohm digs quite deep and has a nice frequency response. V tempted to try it with the Viawave RT850 when funds allow
They seem very identical, I doubt the ceramic layer is really of any difference - they appear surface threated to me. Ceramic is with colors, aluminium is in grayscale. $15 more under normal prices (the aluminium are now on sale at $39 each) with no justification is somewhat not my cup of tea.
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I got a pair of the new CAC mid woofers. First test measurements were taken today. Bass goes very low for the 15cm woofer but IMHO it doesn't have so many ''colours'' as paper woofers. Midrange are superb and very natural with plenty details. Overall good value for the money.
I have made quick setup with SB21RDC and they play beautiful, one of the best budget monitors I have made.
I have made quick setup with SB21RDC and they play beautiful, one of the best budget monitors I have made.
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About that first illustration, is that showing speaker distortion running as low as .1% THD? Or am I reading it all wrong?
.1% would be truly incredible.
B.