Indeed deserving of its own thread. Subscribed!
CEntrance DACport LX vs. iBasso DB2 Boomslang 2 vs. JDS Labs Objective DAC - Page 2
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Oh good, I'm glad you can find the ODAC appealing after reading my comments. I've heard that some people have the same problems I had with it, but most people don't. And as I wrote in the review, it sounds great most of the time (>99%) with most tracks. I had said that each of the three DACs are a great value at their respective prices, for different reasons, but it's very hard to ignore the much lower price of the Objective DAC.
I'm working with Head-Fi member adydula (Alex) to test a possible solution to what seems to be an ODAC power supply sensitivity. I've ordered a "MicroTik 5V USB Power Injector" and a 5-Volt 2-Amp DC power supply that I'm going to forward to Alex for testing with his two Objective DACs. Together, this combination could act as a one-port powered USB hub - without the size and weight of a typical, multi-port USB hub. If it makes any improvement in sound quality for ODAC users, it will come of course, at the expense of having to be near an AC outlet.
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How about some slim battery pack, like your Energizer XP8000, for powering a small USB hub?
Yes, that would get rid of the need for an AC outlet. Here's an inexpensive alternative to the XP8000, if all you need is a 5V USB power source and already have some rechargeable AA batteries and a charger for AA.
Verbatim AA Power Pack Charger: http://amzn.com/B007MLHS2S
I bought one of these for my daughter to use with her power-hungry smart phone and it works really well with Sanyo Eneloop AA NiMh batteries, for recharging/powering her smart phone (from her purse, which now weighs more than ever, thanks to all the stuff she carries.)
If the MicroTik 5VUSB power injector proves to work well with the 5V 2A AC adapter I ordered, then it would probably work just fine with this Verbatim, but you would also need one of these to connect it to the Power Injector:
USB to 3.5mm BarrelJack 5V DC Power Cable: http://amzn.com/B00512Z86I
That's a very compelling review at the link you provided. I have to admit that I was completely unaware of the UD100. I had considered testing the current version of the VDAC, but at $349 it was more than my somewhat arbitrary $300 cut-off for the comparisons I did. I'm no longer in possession of the ODAC or the DB2, so I could only compare the UD100 to the DACport LX at this point.
The DragonFly is another contender in the sub-$300 category, that I wish I had tested. Still, I'm very content with the DACport LX I've bought, for the near future, at least. The trick, now, will be to avoid all opportunities for listening to any of the far more expensive DACs.
from now on, I plan to use listening at low volume levels as a final test of overall quality in any given chain I find myself auditioning.
I 100% support you in that and I believe its overlooked in many reviews. Miguel (aka Mr Arroyo) is one of the few who consistently comments on the ability of a component to perform at low volumes. I am particularly annoyed with channel imbalance at low volumes in various portable amps - a shocking oversight.
True but if this is an amp bundled with the DAC sections it's a problem regardless (DACport vs DACport LX).
Edited by lee730 - 9/11/12 at 2:32am
No, the volume-pot is not 'the amp itself', it's actually the opposite of The Amp, but what I mean is :
Volume-pots have more or less horrible channel-balance at 'low' settings .
Attenuators don't suffer from this problem, but are usually huge (and expensive) .
Digital volume-control doesn't have the problem either, but it almost requires a 24-bit DAC..
Edited by AKG240mkII - 9/11/12 at 8:35am
@AKG240MKII, I disagree with pretty much everything in that post - I'll leave it there. If you want to take that up with someone, I'd suggest Justin at Just Audio can enlighten you. I simply dont have the appetite for these debates any more - I know what I hear from my 'Rev A' uHA-120, and I know he has since fixed that in the Rev B version.