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"So tonight we got to hear the Production version. Everything we heard with the prototypes was there, but the upper midrange area was even cleaner. We also were also able to put the external hard drive on the battery buss. This had a big impact as well. The soundstage got huge, and everything across the board cleaned up. The scary part is this thing isn't even broken in yet. "Darrel.....you're using a solid state external drive based on past comments. My impression is these drives are dead quite so is the music "cleaner" or the "staging" more distinctive as in separation and lower level dynamics ?
Darrell.....you're using a solid state external drive based on past comments. My impression is these drives are dead quite so is the music "cleaner" or the "staging" more distinctive as in separation and lower level dynamics ?
Dave, any thought regarding offering your BatteryBUSS with a different voltage (say 24v)?I'd love to experiment with battery power and my Metric Halo LIO-8 DAC but it needs between 14v and 28v.Thanks,Jim
Jim,The BatteryBUSS will handle voltages up to 24V easily. The internal eletrolytic caps are rated @ 35V @ 105degC.The auxiliary regulated outputs could be 5VDC, 8VDC, 12VDC, 15VDC, 18VDC or whatever up to ~ 22VDC with the Linear Tech regulators that I prefer, too.No worries.Dave
Dave, how does the performance of the BatteryBUSS change as voltage increases? I assume the load it can handle would decrease? Can one still use a 12v battery and regulate "up" or would I need to source something > than the output voltage and regulate "down"?Thanks,Jim
JimYou do realize that the BatteryBuss goes after the battery source. Right?
Jim, it will handle about any load up to 20A at voltages up to 28m volts or so to give a decent safety factor for the internal electrolytic caps rated @ 35VDC. It will be fine for audio use... just don't start a car with it Regulation is a lossy process. Most regulators will consume a volt to a volt and a half doing their jobs. Even LDO (low drop out voltage) regs are around a volt. Since a 12V battery can run anywhere from 11.5V to 14V when fully charged, you can see a potential problem when the battery voltage drops below the regulation threshold (desired voltage + drop out voltage). Regulators just decide they don't want to play and everything gets screwy. Regulators cannot increase voltage. - that would require a DC to DC converter to step up the voltage which kind of negates the entire premise behind the BatteryBUSS. A good rule of thumb is to supply the regulator with the desired voltage + 2V. Everybody is happy then.Dave
Dave, as a theoretical, if I wanted ~22v of output DC, could I use a 24v LiPo battery pack like this?:http://www.maxamps.com/Power-Supply-24V.htmor possibly two 12v SLA batteries in series? I want the best battery solution for fast current dumping - which I'm not sure it matters when using your BatteryBUSS.Again, this is for a Metric Halo LIO-8 DAC that runs on 14v-28v and consumes 24w.-Jim
Thanks Dave! How about preferred battery technologies? The LiFePO4 battery packs are intriguing given their small size and great rechargeability relative to a couple of series-conencted SLAs. How about ability to instantaneously dump current? I know that your BatteryBUSS helps in this department, I was just curious which battery type would complement the BUSS the most.Thanks,Jim
OK, Mach2 Music is ready to start doing Battery Mods which will allow the 2010 Mach2 Server or 2010 Mac Mini, to run on battery power.More info and ordering can be found here: http://www.mach2music.com/order/battery.htmlDarrellwww.mach2music.com
Thanks for the comments, Danny.I was thinking of something like this (12v LiFeMnPO4):http://cgi.ebay.com/Valence-Lithium-Ion-12V-battery-/260742780889?pt=LH_DefaultDomain_0&hash=item3cb57b17d9REALLY low internal resistance (although, perhaps it doesn't matter with the BatteryBUSS). "Only" 40amp hrs of capacity but better rechargeability than an SLA.-Jim