Im trying to figure out what the best arrangement is for the simple circuit of opamp> diamond buffer global feedbackback headphone amp.
The psu i have ready is lm317/337>capmx build, adjustable from +/-24v downward.
Id like to feed the headphone amp at +/-24v, running the diamond buffers at that voltage and then knocking down the rails to +/-14v with simple resistor+ zener shunt for the opamp.
Or i could run the whole headphone amp at 14v and skip the added complexity.
My question is what will be the pros and cons of the 24v version besides complexity? With the diamond buffer at 10v higher the psrr and headroom will increase. But would the extra resistor and the zener used for the shunt degrade the psu or make it better? I can see how the ripple would be smaller with the added reg but the impedance and the noise will be higher?
The psu i have ready is lm317/337>capmx build, adjustable from +/-24v downward.
Id like to feed the headphone amp at +/-24v, running the diamond buffers at that voltage and then knocking down the rails to +/-14v with simple resistor+ zener shunt for the opamp.
Or i could run the whole headphone amp at 14v and skip the added complexity.
My question is what will be the pros and cons of the 24v version besides complexity? With the diamond buffer at 10v higher the psrr and headroom will increase. But would the extra resistor and the zener used for the shunt degrade the psu or make it better? I can see how the ripple would be smaller with the added reg but the impedance and the noise will be higher?
IMHO, about three or four times higher than needed.
Have you determined actual requirements or are you just making it up?
7v?? Im not going for something that belongs in an altoid can 😆
Plenty of high end HPAs run at that voltage, pass labs and bryston for example
Plenty of high end HPAs run at that voltage, pass labs and bryston for example