iPhone wrote: > . > Any low noise switching power supply with proper specs IE 5V DC > regulated, Center positive, sleeve ground Connector: 2.5mm ID, 5.5mm OD, > 11mm long Min supply rating: 1000mA. So as long as it outputs 5VDC with > at least an Amp of current and is properly filtered (low noise) it will > work just fine. > > The only thing better (and only slightly) is using a 6VDC battery with > 10Ahr capacity or better which you would recharge over night after use > (or as need be dependent on use). The slight advantage is it is > absolutely clean DC power with no noise. Hence it is impossible to pass > power supply or mains noise through to the SB3. I have a battery > operated Pre-Amp that sounds just as good as a passive Pre-Amp but I > doesn't lose the gain of an active Pre-Amp with the battery powered > Pre-Amp. It has two batteries so one can be charging while the other is > in use. > .
Hi iPhone! (on a different thread, I'm still absorbing the Vandersteen links you sent me, lol... ) I use a LiFePO4 rechargeable golf cart battery (24AHr, rated for 30A continuous, 90A peak) to power my Mytek Brooklyn external DAC which has a nominal 12V DC input - obviously you have to disconnect the mains AC input. The battery has 4 cells each with a nominal 3.2V output, so overall it supplies 12.8V nominal. But in fact any power supply in the 7-14V DC will suit the Mytek, it's the current capability rather than the voltage which is most important, for solid-state electronics at least. However, with that much current capability it *-is-* absolutely vital that you wire it up with the correct polarity!! I have failed to find a 2.5mm DC power plug rated at more than 5A, but the point of the high current capability is entirely to handle transients - the average current consumption of my Mytek at 12V (or so!) is well below 1A, so there is no real risk of melting a correctly connected plug: the consequence of getting the polarity the wrong way round around WOULD be a little more severe for my DAC. Rather than use a fiddly soldered plug, one can readily obtain 2.5mm DC power plugs from eBay with screw connectors *-&-* the +ve & -ve inputs clearly marked. My golf cart battery can be fully recharged in 6 hrs using the supplied trickle charger. I use an electronic timer to switch the charger off, & position the beastie under my kitchen extractor whilst it's charging overnight just in case, although it is a sealed unit & according to Wikipedia LiFePO4 batteries are the safest type of Lithium ion batteries. As you rightly say, you can't really beat native DC: & it cost less than half the price of the sexy mains-driven power supply that the dealer was -very- keen to sell me... Dave :cool: ------------------------------------------------------------------------ Golden Earring's Profile: http://forums.slimdevices.com/member.php?userid=66646 View this thread: http://forums.slimdevices.com/showthread.php?t=108708 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
