SB ACOUSTICS TW29R & SB23NRXS4 - diyAudio
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Old 6th March 2013, 11:06 AM   #1
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Default SB ACOUSTICS SATORI TW29R & SB23NRXS4

HI Guys.

just got my hands on the new SB Acoustics Satori TW29r tweeter which just only been released recently, an 8 inch woofer and a SB ACOUSTICS SB29 RDC 0004
tweeter.

I was amazed to find that these great drivers are made around the corner from me in Surabaya. I live and work in a luxury business hotel in Surabaya.

As per below the Satori's have found a new home in my floorstanders.

So the plan is to do a 2 way version of the 2 drivers and see what we can cook up.
I have no measuring equipment and normally build my series crossovers by some calculations and mostly by ear. As my past efforts have all been done this way and i am very happy with them.
I would however be interested to get some input from the gurus out there that have some measuring equipment to suggest some crossover topology's.
cheers all and hope to get some great ideas..
Plan.
2 way using the following
SB ACOUSTICS SB29R & SB23NRXS4

PS. I could be persuaded to do my first parallel topology if someone is convincing enough.

box volume on my test box is 450mm high x 210mm wide x 250mm deep. all measurements internal.
I will try and work out the volume after work but if anybody can assist that would be great.
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File Type: jpg 20130306_1852381337991863.jpg (495.6 KB, 853 views)
File Type: jpg 20130306_1852241528575364.jpg (572.4 KB, 800 views)

Last edited by chefsinc; 6th March 2013 at 11:29 PM. Reason: additional info
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Old 6th March 2013, 01:47 PM   #2
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I got impatient and installed the SB Acoustic Satori tw29R into my floor Standers replacing the Vifa XT25.
On initial listening tests without crossover mods they are much much better than the XT25.
Wow the detail is amazing. The XT25 are 1/4 the price of these Satori's but I think it was worth the money.
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Old 6th March 2013, 01:53 PM   #3
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sorry not sure why the pics are their sides.
doing this from my Tablet.
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Old 6th March 2013, 03:50 PM   #4
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Quote:
Originally Posted by chefsinc View Post
sorry not sure why the pics are their sides.
doing this from my Tablet.
From watching Tv in bed?! or
itablet sickness (... headaches; dizziness; nausea; confusion and fuzzy thinking ...) ""Is that iPad Hazardous to Your Health?""
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Old 6th March 2013, 11:33 PM   #5
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TEST BOXES

The philosophy.
take a bullet proof tweeter and cross it fairly low to take advantage of its off axis response and to filter out the break up of the 8inch woofer around the 5khz mark.

On the right track?
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File Type: jpg IMG_20130307_0719251698628430.jpg (459.6 KB, 164 views)

Last edited by chefsinc; 6th March 2013 at 11:46 PM.
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Old 7th March 2013, 03:38 AM   #6
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the specs of the drivers.

The Volume is around 14.5lts or for the imperial measure = 0.5 cubic feet
Attached Files
File Type: pdf SB29RDC-C000-4.pdf (353.0 KB, 30 views)
File Type: pdf SB23NRXS45-8.pdf (210.2 KB, 49 views)

Last edited by chefsinc; 7th March 2013 at 03:46 AM. Reason: additional info
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Old 7th March 2013, 05:02 AM   #7
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Quote:
Originally Posted by chefsinc View Post
the specs of the drivers.

The Volume is around 14.5lts or for the imperial measure = 0.5 cubic feet
sorry the volume is 25 litres. Maths was never my strong point.
lucky I can cook...
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Old 8th March 2013, 12:13 AM   #8
Dissi is offline Dissi  Switzerland
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A classic vented box for the SB23NRXS45-8 needs a volume of 50-70 litres and reaches easily below 40 Hz. But since you are looking for new ideas, my proposal is completely different:

How about trying a closed box? Some people get convinced and never return to a vented loudspeaker again. Accidentally the woofer works very well in your test box, all you have to do is to seal or stuff the port. Combined with a crossover, which inevitably uses a parallel topology (), you get a nice alternative 2-way. Wouldn't it be interesting to compare that speaker with your previous constructions?
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Old 8th March 2013, 01:40 AM   #9
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Hi Dissi,
Agreed with your suggestion. I will get a cabinet maker to make a slightly bigger box around 30lts and use it as a sealed design. the test box is a bit of a squeeze for this driver as the baffle is not quite wide enough for the 230mm driver.
will keep you updated on the progress.
and thankyou
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Old 8th March 2013, 05:40 AM   #10
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Best settings for the SB ACOUSTICS SB23NRXS45-8 is a BR or TL, with a BR int. volume from 42-110L (ideal VB = 70.1 L, FB = 22.4 Hz).
If going with the sealed project those 30L you mention might not be ideal...
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