Regarding power supplies, I am planning to build a 5V 2S 18650 LifePO4 supply using this Ali BMS and my favorite linear regulator (LT1963, this module needs a general purpose 10uF cap added to the output, DS recs 10uF 50mOhm to 3 Ohm ESR). I think it can be built for <$20.
EDIT: the eBay item 333544336446 Title "LT1963 - 7805 Converter / Power Module Conversion 5.5 - 12V to 5V; 1.5A" is the one to get. Cleaner board with all reflow soldering. The Ali board has hand soldering of the resistors.
Hoping to answer the question: What is the difference in sound quality between a low ESR ultra cap PS and low ESR LifePO4 PS?
The added linear regulator might add its own sound character, but no other way to get 5V from 6.4V.
EDIT: the eBay item 333544336446 Title "LT1963 - 7805 Converter / Power Module Conversion 5.5 - 12V to 5V; 1.5A" is the one to get. Cleaner board with all reflow soldering. The Ali board has hand soldering of the resistors.
Hoping to answer the question: What is the difference in sound quality between a low ESR ultra cap PS and low ESR LifePO4 PS?
The added linear regulator might add its own sound character, but no other way to get 5V from 6.4V.
Hardware: RPi Zero W | Allo Kali | ProtoDAC TDA1387 X8 | PGA2311 | Icepower 500ASP | Harbeth SHL5
Software: Moode 8.3.3
Source: Win 10 NAS
Software: Moode 8.3.3
Source: Win 10 NAS
