SB Acoustics vs Seas, small active sealed 2 way

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srekal34

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Joined 2012
#1
I have been thinking to build a v. small(~8ltr) active 2 way sealed standmount(with possible stereo subwoofers crossed ~150Hz). Crossover will be done using Minidsp Flex 8.
On tweeter, I am thinking between Satori TW29TXN or TW29BN - is Beryllium version worth the added cost?
On Woofer, my choice would be either SB17NBAC(cheap but gets good reviews) or Seas W18NX001(mid budget) or Seas W18NX003(with this one I would prefer cheaper tweeter, maybe TW29RN).
Are Seas drivers worth the added cost? W18NX003 would probably get away without subwoofer if I EQ it - my amp is Hypex nc252mp for bass.
 
#2
You can compare both drivers HD here:
https://hificompass.com/en/speakers/measurements/sbacoustics/sb-acoustics-sb17nbac35-8
https://hificompass.com/en/speakers/measurements/seas/seas-w18nx003-e0096-08

If it were me, I'd go the NBAC. I'm not sure the extra bass HD cleanliness of the W18 is worth the much higher price. I also presume Seas have fixed the issues with their cone stability if the W18 is now graphene based, as the original magnesium cones had reported issues in humid climates.

In terms of bass boosting - 1.5mm xmax difference between drivers is negligible and will soon be used up. Unless you are using these nearfield (e.g. desktop) or a small room, subwoofers are probably a wise idea.
 
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#3
Thank you for your insight!
After reading through, I think I will just go with Purifi PTT6.5X04-NAA-08 - sealed box with Linkwitz Transform will give me F6 30Hz and @86dB I will be far from Xmax so I wont need a subwoofer 🙂
 
#4
The Purifi driver is for sure one of the best, if not the best, but it is also super expensive. The Xmax is really amazing, and will give a lot of bass in a smal box.

But just did a sim, and sealed in say 15 liter will give a Fc of 52 Hz, and with only 50 Watt you'll hit Xmax at 30 Hz at an output of only 90 db!!! ....... that is really not a lot!
Vented is a different story; 15 liter tuned to 30 Hz, you only hit Xmax (above the Fc) at 100W giving 99 db at 30 Hz .... that is more like it if you don't want to use a sub.
 
#7
It actually has more and maybe modeling isn’t the best criterium. I might add that some kind of directivity control on the tweeter is about mandatory with most 6”-1” designs. There once was that Mark K ERDXT design that doesn’t get much mention but is worth investigating.
 
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