Introducing the all new SSA Demon. First and foremost, pure accurate and smooth sound quality is a requirement by all SSA subwoofers, which makes the SSA Demon is an outstanding choice for those goals. The all new SSA Demon takes it to the next level in value, clarity, and build quality. What defines a premier level subwoofer? As with the SSA Dcon before, it was best described as a scaled down Xcon motor, with a large single slug, solid pole, and deeply bumped back plate. The SSA Demon moves it up a level though a larger coil, larger motor, stiffer Nomex spiders, and larger leads. All of that means the SSA Demon is able to take some serious abuse, while keeping the sound in check. We were able to bring the power handling up 33% over the Dcon while not hurting the crisp clarity that made the Dcon so successful through the addition of a shorting ring inside the motor of the Demon and increased Xmax through improved spiders and high roll surround. You're safe knowing the Demon is a great blend of the previous Dcon and Xcon, both in design, performance and appearance. The SSA Demon thrives in smaller to mid-sized ported and small to mid-sized sealed enclosures, both in home and car audio. Not to mention, the sealed backplate allows for fairly shallow mount installs. Step your bass up, while not going into debt or sacrificing sound quality. Step up to the SSA Demon. SSA Demon 12" stats: 2.5" copper coil Aluminum former Aluminum Shorting ring Solid pole, non-vented bumped back plate Large single slug motor Pressed pulp cone Tall roll surround Push terminals Dual Nomex progressive spiders Stitched tinsel leads Large dome dustcap SSA Demon 12" T/S specs: Re: 4 ohm Fs: 41.6hz Sd: 51.0 MMd: 142.5 g BL: 15.34 Qms: 3.175 Qes: 0.62 Qts: 0.52 SPL: 88.4 dB Vas: 38.78 Ltr Cms: 104.7 m Krm: 13.3 Ohm Erm: 0.747 Mms: 139.35 g Xmax: 21mm RMS: 550watts Enclosure Information: Sealed: 0.85 - 1.1 cu.ft. Ported: 1.6 - 2.1 cu.ft. @ 28-33 hz Mounting Depth: 6-1/2" Sub Outside Diameter: 12.50" Inside cut-out Diameter: 11.150"