Model is http://www.cerwinvegamobile.com.au/...lifiers/h.e.d.-600.4-4-channel-amplifier.html Amplifier kit and RCA cable used are from Mojo.. Searched in the internet before installing.. looked decent.. They did not have bandridge cables.. http://www.snapdeal.com/product/moj...10_311&utm_medium=101386060&vendorCode=S8283c http://www.snapdeal.com/product/mojo-audio-mvx5m-redsilver-rca/1962302469 I hope it is a decent one.. Paid 12k for everything including basic damping on all four doors.. Amp is installed under the front left seat.. It took about 6 hours for installation and tuning the amp.. Also he had given me a choice.. He had asked me to test this amp, if I don't like it I can downgrade to cerwin vega XED.. Till now I liked it.. The sound clarity has improved a lot.. actually they have replaced the cables with better one's.. I could see the difference as with the speakers alone I could feel the jarring noise at higher volumes.. but after amp installation it cut's off certain frequency.. The current HPF setting on my HU is kept at 80db.. he said if I wanted better bass for a particular song I can switch off HPF.. but for me this looks ok as I tried playing all my favorite songs and it was far better than before.. I always test with the OST of the movie Rush - 1976 by Hans zimmer and Lindsey Stirling - Elements.. There was jarring when I had speakers alone.. Now with amp at 40 volume I did not see any jarring the clarity was too good including the bass..