Cockpit Stereo Amplifier Problem - 340DA

[pfineberg]

Need help locating where the Aft Cockpit Stereo "Amplifier" is on a 2004 340DA Sundancer. My cockpit stereo isn't working correctly, get a "hum" out of all the speakers. Cabin system working fine. There is a switch in the cabin to select "Cockpit"/"Cabin"...or you can have both on..... Believe it might be the Amp that is bad or connection problem, but I can't find where its located....???? Has anyone had problems, and can anyone identify the location of each of the two Amplifiers as shown on the Electrical Schematic from the owners manual. It shows an Amp for the cabin and another Amp for the cockpit.

Need help from anyone. Please e-mail reply to:
Paul Fineberg (pfineberg@cox.net)

Truly appreciate the help