A historic subwoofer that revolutionized sub design

[HomeTheaterGuy]

A piece of history:

The Sunfire True Subwoofer, designed by audio legend Bob Carver about 30 years ago, is a legendary piece of home audio equipment. It revolutionized the market by packing a massive 2,700-watt tracking downconverter amplifier and deep, room-shaking bass into a remarkably compact, roughly 11-inch cube.

The cabinet uses a unique push-pull design housing two 10-inch diaphragms—one active and one passive. This allowed the tiny cube to move massive amounts of air.

It can reach astonishingly low frequencies (down to 18 Hz) that were previously thought impossible without a refrigerator-sized subwoofer.

Carver utilized specialized high back-electromotive force drivers, which allowed the small enclosure to perform with tremendous authority and low distortion.

This was the first miniature high-end subwoofer that inspires subwoofer design to this day.

[David Vaughn]

I reviewed one of those back in the day. Punched well above it's weight class, that's for sure. Here's the Link.

While it would hit below 20Hz, it really lost its steam around 25Hz or so, if I remember correctly. The WAF was through the roof though!

[Paul Heroy]

I never had one but I definitely remember it and how revolutionary it was. 

I recently bought a KEF KC62 for my desktop PC setup, along with KEF LSX II LTs. The KC62 is amazing - 2 x 6.5" dual opposed drivers in a box the size of a basketball. It claims 11 Hz and that's ridiculous, but it will do 25 Hz which is actually amazing. It doesn't have huge output but that's ok for nearfield. 

I do plan to compare it to the new SVS 3000 Micro R|evolution sub, which has 2 x 9" drivers in about an 11" cube. So it's basically the same size as the legendary Sunfire. 

KEF also has the KC92 which is the same 2 x 9" driver complement as the SVS, but it's almost double the size in cubic inches at 2740 vs 1389. It's also 2.5 x the price of the SVS, and the KC62 at retail is also a lot more $. (I bought mine used for about $900.)