I'm planning on putting a dac and headphone amp (both kits) in the same chassis. I want to keep it fairly small for semi-portability, and will be using an external linear psu (also a kit and hopefully fairly small). My naive question is: do I need to use a dual rail psu to feed the dac and amp, or (assuming the psu has the capacity) is it possible to use a single rail psu and split the power in the chassis?
Right, sorry. I misspoke in saying the dac was a kit. It's a board actually, a Mamboberry HAT for the Raspberry Pi (currently a Pi 3, but will be a Pi 2 for simplicity and lower power reqs).
The headphone amp will be one of the TPA6120A2 boards or kits...this one https://www.yuan-jing.com/tpa6120a2-high-fidelity-stereo-headphone-amplifier-board-dlx or this (if it's ever restocked) D2 High Fidelity Headphone Amplifier - DIYINHK.
The psu is where I'm stuck. I need to keep the cost down and still deliver adequate, clean power. At this point, I'm not ready to build a circuit, and need to find a kit or board that'll work. If a single rail can power both the Pi/dac combo and the amp, something like this 5 Amps Voltage Regulator Module, Out 1.5-32V, Based on LM338 | eBay or this https://www.xkitz.com/products/audio-grade-dc-power-supply-200w-variable-voltage-xaps-200w, to which I can add (I expect) a 30va split-bobbin EI transformer. The umbilical would go to a fused IEC on the dac/amp chassis.
The headphone amp will be one of the TPA6120A2 boards or kits...this one https://www.yuan-jing.com/tpa6120a2-high-fidelity-stereo-headphone-amplifier-board-dlx or this (if it's ever restocked) D2 High Fidelity Headphone Amplifier - DIYINHK.
The psu is where I'm stuck. I need to keep the cost down and still deliver adequate, clean power. At this point, I'm not ready to build a circuit, and need to find a kit or board that'll work. If a single rail can power both the Pi/dac combo and the amp, something like this 5 Amps Voltage Regulator Module, Out 1.5-32V, Based on LM338 | eBay or this https://www.xkitz.com/products/audio-grade-dc-power-supply-200w-variable-voltage-xaps-200w, to which I can add (I expect) a 30va split-bobbin EI transformer. The umbilical would go to a fused IEC on the dac/amp chassis.
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