YEP, yep. Power going in Looks like the Calrion amp is dead. Will see if will be covered by Brunsiwick ext warranry, if not its about $150 to reapir or 200 by the new 490 model!
Your radio if it is a XMD3 model, has a setting that needs to be turned on to send power to the amp speakers for the cockpit. On page 14 of the manual it refers to setting the low pass filter. Factory setting is 120. That's where your problem is, cycle thru the options to "REAR" and your amp will now get the signal it needs.