I received my Stereo Integrity HST-18’s today. Seeing the size of the boxes, and then having to carry them across the driveway in the snow and into my shop, I can understand why they are avoiding shipping the 24’s.
These are the deepest, heaviest woofers I’ve ever handled.
Pointless thread, but I felt like sharing my amusement.
Somebody wrote a biquad calculator I'll see if I can find it, not sure what PC it's on. Keep in mind a Linkwitz-Riley is a cascaded Butterworth, depending on what shape your trying to achieve it may save a input.
Well, got the mini dev model added. Phasing looks much like a ported box. And just throwing a 80hz 2nd order LPF on the ported seems to match it pretty well with the mini dev.
I have no idea how the submax and the devastator supposedly play nicely though. The phasing is not remotely similar.
I guess I will just have to build it and measure, then go from there.
I'm actually trying to decide between these two drivers (or the B&C IPAL 21). For simplicity and size I'd start with a sealed cabinet 4-5 cubic feet.
Assuming my WinISD modeling is accurate, both drivers appear to have about the same output (within a few db) at 20hz with the nod going to the HST. Above 35hz, the pro drivers start to have an advantage. This is given a 2000w input.
So what would make the HST better than the NSW/IPAL or vice versa?
Ported flatpack sitting on submax side panels.
I was hoping to get the ported boxes assembled before Christmas, but I overestimated my speed and ambition. Looks like the submax’ will stretch into next year.
18’s in 2019, 21’s in 2020.
I use my setup for both theater and music use, but I always tend to put priority on the music performance. With theater, there is so much going on visually that I'm less critical of the audio in comparison.
Whatever I build I'm going to start with two subs and perhaps expand to 4 for smoother response (not necessarily for more output).
I hope to have them running tonight, will post a build thread tomorrow.
These boxes have lots of compromises based on available space and footprint. Built them with multiple tune options due to integration concerns with horns.
20x36x36.75. 5x5.67 ports. Triple baffle.
Bracing:
All ports open, 20hz tune. 9.3cf , 2500w, under 20m/s port velocity
2 ports open, 16hz tune. 2500w, 30m/s port velocity.
1 port open, 11hz tune. 1000w, 30m/s port velocity.
All ports plugged, sealed box 11cu. 2000w due to xmax.
Chris
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