Tiny Bass Monster
The EP400 uses Axiom's intelligent Digital Signal Processing which is custom-designed with a programming algorithm that "dynamically marries a driver with its digital signal over the driver's entire performance spectrum." The end result, says Axiom, is "unprecedented smoothness or 'linearity', even at maximum output levels in the driver's lowest frequencies." The circuitry makes it "virtually impossible to overdrive an EP-series subwoofer into distortion, even at its highest volume." (That sounds like a challenge to me, but I don't think that's what Axiom intended.)
The EP400 includes a 500-watt internal amplifier and a long-throw 8" aluminum driver. The in-room frequency response is 23-150 Hz (+/- 1.5 dB). It's available in Black Oak, Boston Cherry, Light Maple or Mansfield Beech as standard in-stock finishes, or it can be special ordered in custom vinyl or wood finishes. The standard price is $1,100, which includes sales tax and shipping in the U.S.