LucyWu
100+ Head-Fier
- Joined
- Feb 12, 2015
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In my experience (using shunt regulators where I can set the total current available from the output rails at + and - 15v) Dave does not draw anywhere near half an amp on either rail. My one caveat to this statement is that I haven't tried with a heavy load on the headphone output. (I use RCA outs only.)Good to read that my suggestion to run Dave's original SMPS on DC has this result
Im still hesitating to build the same or ditch the SMPS and feed +5, +15 and -15 vdc direct off batteries.
My opinion is still that the 0.5A max on -15v limits the dynamics.. i heard Farad's effect on the low freqs cause of more reserve in supercaps
Batteries generally do not offer the lowest noise, nor the lowest output impedance at any frequency. Lithium polymer packs with many cells in parallel can improve this but you would need to spend a lot of time matching cells and ensure all soldered joints have identical characteristics (otherwise you end up drawing more current from some of the cells and balanced charging becomes critical). And more cells means more noise. And you still have to regulate the voltage - it's a lot of work. If you are trying to get only the benefit of isolation from the mains, it may be worth it (but it's been tried and found to lack the ultimate performance of a high performance regulated mains supply (Sean Jacob's DC4/ARC6 - there was a write up over on AS as I recall).