2. amps-preamps
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Preamp popping!

Salutations! 

I have a problem and was hoping to use our collective experience to solve it..

My preamp (dared mc-7p) produces a VERY loud pop through the speakers approximately 10-30 seconds after I power it up. I'm now concerned about blowing a tweeter. I can even see the 12" woofers move.

Obviously I can just turn the dared on first, then turn the amp on after a minute or so. But that's just hiding the problem. I'd like to solve it..

Ideas? I've tried nothing yet. My first inking is to try replacing tubes.. Good idea? If so, shall I start with the power or signal tubes? Again, my inkling is to start with power.

Assuming that doesn't work.. What else could it be? Some kind of capacitor gone bad?
128x128toddverrone

Showing 1 response by minorl

minorl
1,015 posts
 
The advice to turn the pre on first is sound. However, many new pre amps like Audio Research have an auto mute feature. It allows the ore to stabilize first. It also forces the owner to physically inmate the pre before using it. 

Its is funny to to see that the initially responded ignored the OP's concerns regarding if a real problem exist.

amps on last. But, if a real problem exist with the pre, it may still have D.C. On the output when you turn the amp on. So in general if all things are working correctly amp on last, pre on first is sound, but if the pre is faulty, it would not have mattered. 
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