Thunderchild
New Member
I bought a set of speakers form a car boot sale, the had not transformer so I run them off the computer power supplies 12 V rail, this is there is a lot of hissing even when the volume is turned off and when a hard disk powers up you here a whining sound, I'm assuming that this is all coming in on the power supply.
I thought to cure it maybe a diode in series with the +12 V followed by an inductor again in series and then followed by a large capacitor, basically a low pass filter with a blocking diode.
I thought to cure it maybe a diode in series with the +12 V followed by an inductor again in series and then followed by a large capacitor, basically a low pass filter with a blocking diode.