Its a Kaption Audio HO 50.4 4Channel Amp. I had it installed for about 4 weeks last summer when i bought it. Then my car was broken into...stole the deck and in dash EQ. Anyhoo, i've been sitting on it for a long time. At first I was being selfish and asking $400. Now I will take $200 firm. This amp retails for $550. I have the receipt for it. It was hardly used......The specs are......

HO 50.4 (High Output)
PWM MOSFET Power Supply
Bi-Polar Output Transistors
4 ohm mono load capability
HP/LP/BP build-in crossover
Selectable 12/24db crossover slope
Adjustable Subsonic Filter
Thermal, Short Circuit and Overload Protection
Oversized Power and Speaker Terminals
300W RMS Output
50Wx4 (4ohms)
75Wx4 (2ohms)

Here is a direct link to the site.....
http://kaptionaudio.com/productframe.html

Need to sell ASAP.....run into some finacial problems........