You might have a ground loop when connected to PC. If you can, use optical connection between PC and DAC. In worst case, that doesn't help either, in my old apartment the interference from PC and other appliances came through the power grid.
First ground the Amps input , nothing else but speaker connected, turn the pot. Silence? Its not the amp.
Now, connect DAC and try. Silence? Try with computer.
First option is to try different power connections, use only one outlet for all units.
Turn plugs 180 degrees. If the computer uses mains earth, try earth wires to amp and DAC.
Usualy you should experience changes in noise that point into one direction.
In most cases the optical connection is the simplest solution.
First option is to try different power connections, use only one outlet for all units.
Turn plugs 180 degrees. If the computer uses mains earth, try earth wires to amp and DAC.
Usualy you should experience changes in noise that point into one direction.
In most cases the optical connection is the simplest solution.
My PC doesn't have optical out. But I have a Behringher uca202. Can I use Behringher's optical out to connect to another dac with optical in and then to the amp?
With a smartphone as source and at higher volume levels, you have cracking noise on one channel.
The volume potentiometer is a likely source of such noise. Turn it fully up and fully down (without power) some 10 times and try again.
It can be a poor connection at the input connector (re-insert the connector a couple of times) but it can also be a poor capacitor in the signal path.
Take an RCA cable, plug one end into amp, the other one connect outer (earth) and inner (signal) contact with a little wire wrappt around. It is only for a test!
Then switch the amp on, speakers connected. Now play with the pot. What you can hear in this configuration, is the amp. If there is complete silence, what is to be expected or maybe a little hiss from the tweeter, when volume is 100%, everything is OK.
Now you start to connect other appliences, one at a time and monitor for noise, cracks etc.
If you post your results, someone here will be able to help you find the problem(s).
Then switch the amp on, speakers connected. Now play with the pot. What you can hear in this configuration, is the amp. If there is complete silence, what is to be expected or maybe a little hiss from the tweeter, when volume is 100%, everything is OK.
Now you start to connect other appliences, one at a time and monitor for noise, cracks etc.
If you post your results, someone here will be able to help you find the problem(s).
To tell you the truth, it is allways a surprise, if a wired connection to a computer does not make noise problems.
For measuring audio stuff, I use a laptop and disconnect the power supply for serious measurments. This way you keep the noise from the power line out. No good idea for permanent music listening, I know, but just to show you how problematic this is.
The second you have two electronic devices conected to the power grit, you might run into trouble. This is mostly caused by the protective earth. Normal...
For measuring audio stuff, I use a laptop and disconnect the power supply for serious measurments. This way you keep the noise from the power line out. No good idea for permanent music listening, I know, but just to show you how problematic this is.
The second you have two electronic devices conected to the power grit, you might run into trouble. This is mostly caused by the protective earth. Normal...
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