Right. So all those cylinder subs from SVS and all of HSU's are just going to fade away and they'd willingly keep making that design?
Just do your research on the driver. Some drivers are more susceptible to sag than others.
Even if doing research, the suspension sags and the performance gets lost. Sonotube are good because it provides the simplistic of design, but I am not saying they will be obsolete. Down firing and up firing loses performance because of Xmax gets lost. A speaker driver can lose about 1 to 20 mm if it is put a down firing or up firing. Losing only about 1 mm may not seem a lot, but it is a lot if trying to produce bass. In order to produce bass, a lot of displacement is required. Xmax mainly governors displacement.
Sonotubes can be used for making front firing subwoofers. I am not stating that sonotube subwoofers are obsolete. You are stating they are obsolete because on the statement that I said.
No computer speaker set is going to come even remotely close to what a true, purpose built subwoofer is capable of. For a high use of movies, I think you want a sub capable of producing 100db or more @ 25hz and up as a minimum. There's just a lot of material in that range in movies any more. And it's one thing to be able to produce it, another to do it loudly, and another yet cleanly.
I only say 25hz because getting lower than that really requires a combination of big drivers, big boxes, and a lot power. Plus there's been a bit of a trend lately in BR audio mixing where they are starting to put a LFE filter on content under 25hz. It sucks. But that's what it is.
I've got both a 12" Dayton RS in a sealed box and an MFW-15. There's only a few scenes where the Dayton 12" can't provide the same impact as the MFW. It can play them, but it's just not the same kind of physical feedback the the larger driver, and 2x larger ported box of the MFW can do.
I like the Daytons because they are well built and very low distortion. They just don't have quite the excursion and paper specs of some of the more adventurous subs from Exodus (Tempest X, Mal-X, ect) or AE.
You sound like a reasonably handy guy. Subwoofers are not hard to build. All you really need is a circular saw, jig saw, a pile of clamps, and some wood glue..a router is definitely preferred for hole cutting and rounding off.
A sheet of 3/4" MDF and you can build about anything out there short of the really big monsters like table tubas.
Who said that jlee is using computer speakers.
FYI, it is displacement is the key for subwoofers. A 12 inch woofer can compete against a 15 inch woofer. It all matters about the Xmax. Sure Sd matters too, but Xmax will still governor the output.
Sealed type of subwoofers are not designed for output. They are designed for accuracy. If you need loudness, vented or bass reflex is better. Using a Linkwitz Trransform can improve the performance of a sealed subwoofer, but still the Xmax is the limiting factor.
The Dayton RS is designed for audio accuracy, so the subwoofers will not hit low. They have to be equalized or use multiple woofers. A better option to hit 25 Hz is use two Dayton RSS315HFA-8 in about 3 cubic feet box using a 500 watt amplifier. A Linkwitz Transform is optional. At 25 Hz the SPL is at 105 dB. Though if used one Exodus Shiva-X2 12 inch in the same box, it gives the same amount of output and the same performance. The difference is Xmax.
Movies having limit on bandwidth for channels depends on the funds for the foley artists. It also depends on the AV receiver that you bought. If you buy a lower end model, you get crap. Stating that there is a limitation in frequency response requires evidence. You need to show spectrograph of sound to prove what you said. Though could be hearing artifacts, but what does it matter to you since you do not care what is below 25 Hz
You just do not like me because I am stating facts that are true. I am trying to help while you make it worst. You need to get off your high horse.
