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Amp Shutting Down, need help

I have a Cary 7.250 brand new amp that shuts down after 20 seconds in my NYC apartment. I have sent the unit back to Cary where it tests fine. I have tried the unit at my friend’s apartment and his place of work and it works fine. The unit is 100% in working order. After talking to many people I was told to attach a 50' extension cord and low and behold it worked.

The good news is that I have a dedicated 20amp circuit to this outlet. My voltage reads 118 volts and Cary said that is not a problem as the unit will work between 90 and 130 volts. I have tested for voltage on the negative lead to ground and there is no stray voltage. I have also tried the unit on other outlets in the apartment and the same problem occurs.

My mono blocks and all other components work just fine. So I’d love to hear suggestions as to how to get rid of this 50’ extension cord?

Thanks in advance.
sailcappy
sailcappy OP
57 posts
 
Should I put shorting RCA's on all seven of the inputs? What do i do with the XLR's?

Sailcappy
sailcappy OP
57 posts
 
Installed the Brick Wall today and it did not solve the problem.

I guess Ken and his Oscilloscope is the only solution.
jea48
4,413 posts
 
I guess Ken and his Oscilloscope is the only solution.
09-03-12: Sailcappy
Not the solution but maybe find the problem.

Sailcappy,

While you are waiting for ken....

It was suggested to me, by an AA member, to try the amp in another apartment in your high rise building.

He also suggested you check the common house corridor on your floor, outside your apartment, for a receptacle you could plug the amp into. There is a very good likelihood the receptacle, in the corridor, is fed from a different distribution power transformer than your apartment electrical panel.
gbart
290 posts
 
If it were me, by now I would be either trying to get my money back or llooking to sell the amp. Before owning my own house, I lived in an apartment with a single 15A circuit serving the entire place. It does not get worse case than that. I owned several high powered amps during that period and never once experienced a shutdown problem. Cary gave the amp a clean bill of health, therefore it should not be having the issue. The amp seems like more trouble than it's worth, IMHO.
sailcappy OP
57 posts
 
I agree. They will not give me my money back. They are willing to send me a new one. Do you think it is worth a try?
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