Originally Posted by tomb
Also, switching power supplies can sometimes be used with amplifiers (including headphone amplifiers) with good success. However, every amplifier circuit has a calculated property known as PSRR - Power Supply Rejection Ratio. It's a measure of how much noise in a power supply will affect the amplifier circuit itself. Good circuits have very high PSRR's. However, powering a source such as a DAC does not qualify. Once noise is introduced, it'll propagate throughout the signal stream.
I am finding that people on these forums are replacing operational amplifiers with better ones to improve the PSRR they specification by not finding a way of searching for commercially built headphone amplifier with high PSRR specifications Ready to go.
I am wondering if anybody has a list of operational amplifiers with particularly good PSRR specifications. The only thing I can think to do improve my searching successfully for headphone amplifiers with good PSRR to search by IC chip, but by do not know if that will work successfully.
I like the philosophy of those people at HiFimeDIY Who believe in good value in their products with simple enclosures or no enclosures at all and few bells and whistles. A very simply enclose headphone amplifier or even when I have to enclose myself would suit me just fine if it was a very good value. I will not need many bells and whistles for I plan to use this headphone amplifier only with my desktop computer and do not mind needing to do all the controlling of it from there.
Edited by bbmiller - 2/3/14 at 6:27pm