https://www.soundandvision.com/content/ascendo-s-seismic-subwoofer-modern-marvel
"We wanted to know what it takes to design and build a subwoofer of this caliber — one capable of producing peak levels up to 140 dB and deliver 105 dB of sound pressure at 5 Hz. Is a subwoofer that weighs 441 pounds and uses a single 50-inch (!) driver"
. . .
"We designed a woofer with a huge voice coil almost 14 inches in diameter"
"We wanted to know what it takes to design and build a subwoofer of this caliber — one capable of producing peak levels up to 140 dB and deliver 105 dB of sound pressure at 5 Hz. Is a subwoofer that weighs 441 pounds and uses a single 50-inch (!) driver"
. . .
"We designed a woofer with a huge voice coil almost 14 inches in diameter"
How would one get a powerful enough magnet to maintain over one Tesla in the gap at that physical size? Rob one from an NMR machine? And cyro-cool it?
from the same article: "driven by multiple Neodymium ring magnets totaling 40 kg (88 pounds), and custom machined pole plates and T yokes made of pure iron with very low carbon content."
Apparently they've also got an 80" model, personally I think the cone on the 50" looks better engineered though.
And not going to lie, I could use one of those 50" models myself, or a couple...
And not going to lie, I could use one of those 50" models myself, or a couple...
Actually there are 90 MHz NMR bench tops nowadays, also using neodymium magnets.
