A little more info I have found out my amp is a Wandeli V12 F705 which is a Alpine copy.
2/3/4 CHANNELS *
* 4 x 85W RMS *
85W X 4 CH.RMS (4Oohms, 20H@ 20KHzz, 0.04% THD)
PWM mosfet DC-DC power supply
independent adjustable divider
non - fading pre-out for subwoofer
gold - plated RCA Jack and Terminals