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SB Acoustics Satori Monitor

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#845
The SPL plot for the 7½” SATORI MW19P-4 also looks suitable for a 1.8-1.9Khz LR4 - LR6 crossover 2-WAY.

ANY MW19P DESIGNS?
 

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#846
5th element said:
Have a look at the manufacturers graph.

SB Acoustics :: 6 1/2'' SATORI MW16P-8

You can see that the Satori starts to beam at a little over 1.5kHz. Ideally you'd want to cross it before it starts to beam but realistically it would work well with a 2kHz cross.
Click to expand...

Yes - but my question is more lke this: If the satori tweeter is only measured at 30 degrees:
SB Acoustics :: SATORI TW29R
Then why not only follow the green 30 degree axis for the 6½".
An if I should go for better. Then at how many degrees, do I find the limit for good power response?
 
#847
Tordenguden said:
Yes - but my question is more lke this: If the satori tweeter is only measured at 30 degrees:
SB Acoustics :: SATORI TW29R
Then why not only follow the green 30 degree axis for the 6½".
An if I should go for better. Then at how many degrees, do I find the limit for good power response?
Click to expand...

At 30 degrees or even 60 degrees the Satori tweeter is radiating hemisphreically, no beaming is occurring and its dispersion is wide. This has no relation to the woofer that starts becoming directional a little before 2kHz.

When concerning directivity and driver integration of loudspeakers that do not employ any form of directivity control, the goal is to keep the radiation pattern wide up until the point where the tweeter starts to beam.

If you cross the Satori drivers at 2kHz you will see a slight wide>narrow>wide profile as the woofer starts to narrow in it's dispersion before widening again as the tweeter takes over.

Usually people cross over too high to ensure that there is a complete absence of wide narrow wide, this is especially irksome when the designer has used a tweeter that is fully capable of crossing lower. There is always a bit of wiggle room however and a 2k cross with these two drivers would be quite acceptable.

With most designers wanting to cross over slightly higher than is ideal it is a wonder that more do not try and employ wave guides as they do solve a lot of problems but cause very few.
 
#848
Finaly this one SB Acoustics :: Satori TW29RN <font color="#FFFF00">NEW! </font>

with two Satori 7.5"/8 ohms in MTM for a +6 DB to match the efficienty of the 29RN tweeter (96 db) could be nice... The FS of the TW29RN is 100 hz higher than the TW29R but the impedance peak at FS seems smoother... could it give a better Mid to tweeter XO ?

Too bad Zaph doesn't have distorsion measurement of the Satori 7.5"... if very low as the 6.5" this MTM in an OB with EQ could give enough level < 600 hz without too much distorsion at home level (and with a plated amp sub....but this OT).

Could the roll off on an OB around < 600 hz could help to have a LESS energic slope for the SB29R ? LR2 ?
 
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#849
For the SB Acoustics SATORI TW29RN tweeter, has anyone removed the •Two part aluminum faceplate with integrated mechanical decoupling• and attemped a direct on-baffle mounting to reduce the Center-to-Center distance between the midrange?

It seems a "shame" to pay for the small NdFeB magnet diameter TW29RN and not be able to use it for improved lobing from mounting the TW29RN-core directly against the midrange.
 
#852
Oups.... sorry, my mistake ! it's the oldest one:


"SB Acoustics SB29RDCN test results...


•[image] - Frequency response
•[image] - Frequency response, 0,15,30 degrees off axis
•[image] - Impedance zoom
•[image] - Cumulative spectrum decay
•[image] - Harmonic distortion
•[image] - Harmonic distortion +10dB
Looks very good. The SB neo dimple dome is one of the very few small flange neo tweeters that has a rear chamber that actually works. There is a nice low Fs and there is no sign of a double impedance peak that indicates a restriction between the front and rear chambers. Aside from excursion limitations, the presence of a well designed rear chamber is the next most important thing that allows a tweeter to reach a higher output without a large increase in non-linear distortion. A worst case low end tweeter with no rear chamber and no perforated voice coil former has very high and non-linear compression and rarefaction pressures under the diaphram and surround, leading to high distortion that gets much worse at higher levels. The world is full of neo tweeters with rear chambers that are not well designed. Hi-Vi and Morel are a couple of them, with high distortion and the dual impedance peaks that are the trademark of a poorly ventilated rear chamber. A neodymium slug with a tiny hole in the middle isn't going to do it for rear chamber ventilation. "

thanks 5th element for the rectification...

Too bad John doesn't measure anymore on his blog !

Do we need pattern from axis to 45° and harmonic F2 to F5 distorsion measurement from the constructors with the IEC bafle ??? Oh yes we do ![/image][/image][/image][/image][/image][/image]
 
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