ZX 504-AX 4-Channel amplifier
600 W Peak
50 W x 4-4 OHM RMS
75 W x 4-2 OHM RMS
150 W x 2-4 OHM RMS
Patented Aphex® Processing in all ZX models
Massive Mosfet Power Supplies for smooth, fast transient response
Mute on/off circuit for smooth and silent switching
Simultaneous stereo/mono operation for greater system flexibility
Variable electronic crossover with switchable LP/HP/Full range
Discrete bi-polar output stage assures optimum transparency & balance
Variable gain control fine tunes system output with greater precision from
0.1 to 5.0 Vrms
Built-in 6-way protection circuits for years of trouble free performance
Stealth mounting heat sink design conceals wiring & provides a cleaner more
finished and professional install
2-ohm / 4-ohm stereo or mono operation in ZX models.

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http://www.parthenet.com/cartsnap/cartsnap.cgi?cwg

Looking to get best offer. Will ship anywhere from Ontario Canada.