I built two 20 cu. ft. cabinets based on the Maelstrom 21" drivers for use in a large digital organ. Driven by a Peavey 4080HZ amp, they deliver 16 Hz output that can be felt throughout the church building where it is installed.
More details are available on the project blog at http://homepage.mac.com/clintonk/iblog/B505170200/index.html-
The 21" Maelstroms absolutely deliver on the promise of massive output of low bass.
[5 of 5 Stars!]
