28BSST2 circuit breaker tripped

[Rod#S]

Hi;

I recently got a pair of 28's and this morning when turning on the system I noticed that one wasn't coming on. When I investigated I discovered that the amp's power switch had tripped to the off position. My amps are powered on remotely from my Lexicon MC12. The Lexicon has a 12v power trigger which receives power the moment the processor is turned on and that's what I run to one of the 28's. From that 28 I use it's 12v out to connect to the 12v in of the 2nd 28. It was the 2nd 28 in sequence that tripped. Once I turned the power back on and powered on the Lexicon the amp turned on as expected.

I don't think there is anything wrong with the amp but what would be the typical reason to cause the tripping of the power switch? Perhaps the amp powered on to closely time wise after the first drawing to much power from the wall?

Thanks,

Rod

[-E-]

Considering the idle and startup draw of the 28B, that is entirely reasonable; or something spiked in the 12v trigger which caused it to trip. Either way, it seemed to protect itself well.

[BlueSky]

A circuit breaker trips due to 1) an overload or 2) a circuit breaker that has "changed" and trips at a lower current than it was designed to trip at. If the two amplifiers turned on at the same time the available current to each amplifier would be less than would be available to a single amplifier (I squared R losses in the wiring) so that would not be the cause of the breaker tripping.

I have two Bryston amplifiers in my system and every so often, one of the amplifiers (the same one all the time) will trip its breaker and I have to do a reset. I'll call it a "weak" breaker. It happens so infrequently, however, that it doesn't bother me any more to get up and reset it.

[Rod#S]

Thanks guys

[essjay]

I have the same problems with the 7b's when i fire them up together

[Rod#S]

Deep down I didn't think there was an issue and now reading about your 7's I'm feeling really good and there is nothing to worry about.

Thanks