I think I just smoked my Amp


Ummm… yeah… what the title says…

Just received a new pair of speakers, Thiel MCS1. I got them hooked up, powered up my pre and my amp, started playing a test track (a progressive house song), I immediately noticed a slight crackle in the right channel, and as soon as the song got to the part where the bass beat dropped, the amp went into protect mode. It stayed in protect for about five seconds, then the “operate” light came back on, but the audio did not return. I powered the amp down, tried powering back up, but the protect light immediately returned, but it was extremely dim. Now, the power switch does nothing; nothing lights up. I smelled the vents in the top, and nothing smelled burnt or out of the ordinary.

My uneducated guess is that the lower impedance (4ohm nominal, 3ohm minimum), strained an aging cap which then gave up the ghost, but really I have no idea. My previous speakers were a much easier load (10ohm) and the amp handled them just fine.

 

I really don’t know what to do now, but I’m bloody devastated.

My system: 

ARC LS25 MKII

ARC D400

SMSL M400

Auralic Aries

rfnoise

Showing 2 responses by itsjustme

i lso dont think the discussion on 2 fuses above sounds right. You almost certainly have one line fuse on the 117 VAC (house power).  Other fuses woudl either be rails (+ and - power supplies) or speakers. Both are in pairs.  So i can see 3, btu not 2.  If there are really two , i suspect both are power/lie one for supervisory o similar power and very small.

if you blew a fuse -- or anything else that quickly either you have a coincidence, ro, i suspect, you shorted something liek a speaker wire, and that short likely is still there.  Check carefully.  In fact begin withe the speakers disconnected. if you hapen to own a VOM, with everything off, and ideally, but not reqyired, with the wires disconnected form the amp (its off, right?  and has been for a long time, right?) measure the resistance across the speaker terminals.