I have an older Hypex UCD400 amplifier and I hear a click on my speakers whenever I turn it on. Also, when I turn off the amplifier, there is a low volume whining noise that can be heard as the capacitors are discharging. This behavior has been present since I have had the amplifier, but the noises are not loud enough where I am afraid of damage to the speakers. My guess is that there is a DC offset, but I figured I would see what people more knowledgeable than myself think and what the best solution would be. I have attached some pics of the amp. Any help would be appreciated!
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My UcD180HG have a square/triangle wave sound that lowers in frequency as the capacitors discharge.
As there are no relays disconnecting the speakers the click is probably the oscillation starting creating a small bump before it gets going. The whining noise is probably the oscillation breaking down as rail voltage collapse. I have not seen any DC offset push the cone ether way though.
I figured it to be normal.
If it isn't I'm sure someone will step in and yell "turn it off before you break something".
As there are no relays disconnecting the speakers the click is probably the oscillation starting creating a small bump before it gets going. The whining noise is probably the oscillation breaking down as rail voltage collapse. I have not seen any DC offset push the cone ether way though.
I figured it to be normal.
If it isn't I'm sure someone will step in and yell "turn it off before you break something".
Thanks, glad to hear that I'm not the only one seeing this behavior. Do you have a soft start module on your amp? I was wondering if that would make any difference.
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