jokan
Addicted to Fun and Learning
I have an amplifier that can only accept 0.5mv/47kohm RCA input. Unfortunately I have no audio preamp that has such low level outputs.
Before I get suggestions of turning down the preamp, that doesn't cure the clipping/saturation problem no matter how low I turn the output voltage on the RCA output from my playback device.
The input stage is maxed at 0.5mv input. Think 20-30 years ago hi-fi.
Example, playing out of my Galaxy note 8's 3.5mm jack at full tilt doesn't cause audible clipping or over-saturation of the input stage.
I need your help in designing a converter to reduce the output voltage with minimal parts to reduce the voltage down to 0.5mv. Any higher and clipping occurs.
I like this little amplifier as it sounds great with a lower input signal voltage. Good enough that I see no reason to upgrade sideways to a device that takes a higher input voltage. It doesn't matter how low I set the amplifier given a 2v input. 1v and the distortion is reduced but present.
Go down to the headphone output from my phone and it's perfect.
If someone could take the time to draw up a schematic and list the parts needed for a 2 channel device that would serve as a adaptor to reduce the output from my DAC that would be great. I have zero intention of throwing out an amplifier from literally 2 years ago. It sound dynamic, clean and suitably matched to output voltage it is perfect. It isn't necessary to have adjustable gain control. My preamp will sort that out. The fewer the components used would be awesome. I dislike parasitic parts. This little amp is used on a literal desktop and will only be used for emergency use. I do not want to use cheap internal parts. No off the shelf converters. I am happy to assemble the converter, I suppose I need values and a simple schematic. I will source RCA input sockets and output sockets.
Thanks.
Yet another example that Gain control is NOT to be confused with volume control
Before I get suggestions of turning down the preamp, that doesn't cure the clipping/saturation problem no matter how low I turn the output voltage on the RCA output from my playback device.
The input stage is maxed at 0.5mv input. Think 20-30 years ago hi-fi.
Example, playing out of my Galaxy note 8's 3.5mm jack at full tilt doesn't cause audible clipping or over-saturation of the input stage.
I need your help in designing a converter to reduce the output voltage with minimal parts to reduce the voltage down to 0.5mv. Any higher and clipping occurs.
I like this little amplifier as it sounds great with a lower input signal voltage. Good enough that I see no reason to upgrade sideways to a device that takes a higher input voltage. It doesn't matter how low I set the amplifier given a 2v input. 1v and the distortion is reduced but present.
Go down to the headphone output from my phone and it's perfect.
If someone could take the time to draw up a schematic and list the parts needed for a 2 channel device that would serve as a adaptor to reduce the output from my DAC that would be great. I have zero intention of throwing out an amplifier from literally 2 years ago. It sound dynamic, clean and suitably matched to output voltage it is perfect. It isn't necessary to have adjustable gain control. My preamp will sort that out. The fewer the components used would be awesome. I dislike parasitic parts. This little amp is used on a literal desktop and will only be used for emergency use. I do not want to use cheap internal parts. No off the shelf converters. I am happy to assemble the converter, I suppose I need values and a simple schematic. I will source RCA input sockets and output sockets.
Thanks.
Yet another example that Gain control is NOT to be confused with volume control