MADE IN THE USA!!!

Earthquake Sound Corporation is proud to introduce the next generation SuperNova MK Series.
The new SuperNova MKVI includes an all-new recessed amplifier with built-in room correction. Many companies claim that they have room correction built into their amplifiers. However, their subs only use level adjustment by volume.
Earthquake's new SuperNova subwoofers with built-in IQ amplifiers deliver the tools you need to correctly adjust a room to precision audiophile status.
Most subs with built-in amps use a simple equalization method that does not correct the rooms' "phase" related problems. The new SuperNova MKVI subs have true room correction that take time reflections and refractions into consideration. These state of the art amplifiers fix both the arrival time and equalization while others try to equalizer rooms by adjusting the volume. Would you call that room correction? The new 99% efficient SuperNova subs with IQ amplifiers address the actual phase correction problem along with the room EQ.
Room Correction: 20, 30 and 40Hz Room Equalization With 12dB range and Boost.
Optical Distortion Limiting Circuitry (OoDL): ODL was created to eliminate audio amplifier input stage clipping without distorting the audio signal.
Overdrive: Overdrive is a patented feature that allows the Supernova amplifier to generate maximum output with virtually any level of input audio signal.
SLAPS Passive Radiator (Follow link for more info)
Full range speaker outputs high level audio input Signal detection circuitry Variable, 24dB per Octave, low pass filter 110 / 220 power connector
Low level (RCA) audio output, in high pass mode @ 100Hz
Features:
XLR / RCA Input Connections
Variable Phase-Delay: Up to 20-ms
Room Equalization
Subsonic Filter
Room Correction: 20Hz, 30Hz & 40Hz Adjustable
Phase Shift: 0-180 Degrees
Dual Gains Internally Mixed
Music Sensing ON/OFF
SLAPS (Symmetrically Loaded Audio Passive System)
Available In Black Ash Wood Veneer or Piano Black Lacquer Finish
Model MKVI-12
Frequency Response 16Hz - 130Hz
Amplifier Power 600 Watts RMS, With Patented Class "J" Circuitry
SNR 106 dB Balanced
Dimensions (H x W x D) 16 1/4" x 15 1/2" x 19 1/2
Weight 73 Lbs.
Bass Unit 12-inch Magma
Passive Radiator 12-inch
Review:
http://www.hometheaterhifi.com/subwoofers-products-menu-column1-41/598-earthquake-supernova-mkvi-subwoofer.html