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Post by dotnet on May 30, 2008 15:41:57 GMT
I reckon you can't beat a beefy lead-acid battery as a power source. They are very low-impedance, no-ripple sources that avoid many of the problems mains power supplies face.
There are very few (a couple?) of power amps that are optionally powered by battery, but I'm not aware of any headphone amps (I'm not talking about portable ones running off 9V batteries...) Yet headphone amps are far more suited to battery operation than power amps.
Would it not be a good idea to rig up a large enough 12V or 24V sealed lead-acid battery (or two)? In return for having to charge it once a week/month/whatever you'd get a hum-free, RF-free, tons-of-amps DC source.
Cheers Steffen.
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Deleted
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Post by Deleted on May 30, 2008 21:16:47 GMT
Steffen If the batteries were in the same enclosure, I would agree with you. However , in practical terms, you would need fairly thick connecting leads between the batteries and the unit which would also cause a few minor problems. Quite solveable ones though. These days you can get very good results using some of the better mains PSUs. Having worked in Telcommunications (telstra), I often wondered how my (then) 100W/Ch amplifier would sound if powered from the + and -52V Telephone Exchange busbars.
SandyK
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Post by justinp on Aug 22, 2008 12:20:36 GMT
As someone who plans to build their own off-grid house, I'm very interested in what can be achieved with a dc power supply. Part of my journey into low power amps and efficient speakers is led by this.
J.
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pagan
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Post by pagan on Aug 23, 2008 12:12:11 GMT
[quote author=sandyk Having worked in Telcommunications (telstra), I often wondered how my (then) 100W/Ch amplifier would sound if powered from the + and -52V Telephone Exchange busbars. SandyK[/quote] And you didn't try it??? Shame on you
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