I need a diagram of how to hook up my Bluapunkt V450 4 channel amplifier, to 2 channel mode. I spoke with a technician where I purchased the amp and apparently the diagram I have is incorrect in order to go from the standard 50 watts X 4 to 130 watts X 2 mode. I understand that this product is no longer available due to the age, but I'm hoping that the information I need is. Thank you, Tim