Hi,
It's not normal with +28dB power amp and 90dB/W/m speakers to hear any hiss or any hum at the speaker.
Are you listening to the noise generated by the Zin resistor?
Short the input RCA either with zero ohms, 0r0, or use a resistor that matches the source equipment output impedance ~ 200r, connected from RCA signal pole to return pole.
It's not normal with +28dB power amp and 90dB/W/m speakers to hear any hiss or any hum at the speaker.
Are you listening to the noise generated by the Zin resistor?
Short the input RCA either with zero ohms, 0r0, or use a resistor that matches the source equipment output impedance ~ 200r, connected from RCA signal pole to return pole.
Rainwulf said:Is it a noise, or a hiss?
Is your power supply a linear one? Or a switch mode one.
It's a hiss. The Linear PS is drawn at below the first diagram.
http://www.diyaudio.com/forums/attachment.php?s=&postid=1792720&stamp=1238766687
Well there is no reason for that to hiss thats for sure.
What is your voltage?
With the amps connected, what is the voltage of the rails.
What is your voltage?
With the amps connected, what is the voltage of the rails.
Well thats within specs.
Dont know!!
Unless something you have done, or the kits themselves arent using the data sheets intended circuitry, it should be fine.
Dont know!!
Unless something you have done, or the kits themselves arent using the data sheets intended circuitry, it should be fine.
AndrewT said:but post15 shows r1=r2=1k0
I was lazy when I draw the schematic. so didn't change any label...
AndrewT said:and then ask for help
My intention was to show Rainwulf how my Amps have two separate grounds. so there was no need to label each part exactly.
Rainwulf said:So apart from the hiss, you are happy?
Yes! I could get rid of the hum...! and As I said the his is a tad!
Best Regards to you!😉
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