OK, now this is just going too far. Last night I packed the receiver back up with everything that was included in the original box as instruced by Tom at Advanced Audio. This morning while I was at work my wife carried the unit back to the store and was told that it was once again going to be shipped off to Service Wide Technologies for repair! On top of that, she was told that Audio Advice was not qualified to perform complex repairs such as the one that I am dealing with even though they are an authorized Marantz service center. I can not tell you how upset I am at the moment. I don't know what else to do. Should I call my credit card company that I purchased the unit through and see if there is anything they can do? I have tried to be calm through this process but I can not take getting the run around much less getting lied to by the dealer. I have e-mailed Marantz with the problem and am awaiting their response. What else can I do here?
Short of going to small claims court not much, but I doubt it would be worth the hassle. Sounds as if they are trying to run the clock out on the warranty.
Just one thing, are you absolutely sure you have no whiskers or problems with your speaker circuit? If that is OK, are you certain you don't have a speaker that has become defective and has shorted voice coil turns dropping the impedance? You probably don't, but you will really be upset if you get a new unit and the same shut down occurs.
And finally are you sure that you don't have speakers that have an impedance and or phase curve incompatible with that unit? These problems do occur.
I just had a look at your gear. The Marantz has an 8 ohm rating. Power into 4 ohms not specified.
Those Jamo 809s are rated at 6 Ohm, but from the driver topology I would highly doubt that. More likely the impedance is dropping to the 2 to 3 ohm range and with an adverse voltage current phase angle to boot.
I would insist that Jamo send you the impedance curve and the voltage current phase angles, especially in the areas of lowest impedance. I'm seriously starting to wonder if this is your real problem.