sorry to bump this old thread, but I am experiencing issues related to this topic I fear...
my system is powered on a dedicated 20A line, with a breaker using a slow characteristic (C20) supposedly to mitigate power rush in at startup. Has always worked fine. The trouble started (I think) when I decided the power draw from the 28bs in standby mode (both 6 watts) should be cut, and power the system via a remotely controlled socket switch. Thus ensuring no power is used at all when not playing.
can't really pinpoint the number, but ever since, the ground braker tripps when powering the system. Mind you the 28b's are in their Off state at that moment, I always carefully assure they are, so this isn't a matter of huge power rush inns to the amps (I should think).. I can hear a deep 'clunk' when this happens, and this is clearly something else than the wonderful sound the 28b's make when actually turned-on.
@james, could you please have a look for me, and check what the 28b's do when powered (as in: have their power cables stuck into the wall sockets). What specs can you give me?
I'll have my electrician come over next week to check the house installation, so would appreciate any pointers you could give me for that inspection too.
after some serious 'pulling of the power cord' while the 28b was completely naked, ie no connection to a speaker and 10bsub, things seem to go alright, though I can still hear the occasional 'clunk' inside the 28b. No tripping of the ground-breaker switch just yet.
But, connecting the balanced (XLR) from the 10Bsub out to the 28b, and connecting the power cable to the wall socket (directly, no remote switcher) the ground breaker tripps.
I am in contact with the dear people at Mafico, but would appreciate your thoughts as well of course.