Quote:
Originally Posted by Nirvana1000 
...Here is ALO's upgrades quoted from their website.Some people think they only made minimal changes which don't require the cost compared to the original Mini^3.But ALO's version is a fine competitor in this category of portable amps. "We begin with a proven solid AMB.org Mini3 "High Performance" model pocket amplifier board and add our own modification to upgrade the original design. We first use Black Gate capacitors on the voltage rails to the opamps to offer better bass and weight, punch, and control. The stock caps are used as bypass caps and the BGs are used in parallel for extra rail "stiffness". Next we changed a few resistors in the signal path with a brand that we believe offers a less grainy top-end and has more extension and is more effortless sounding. Because these resistors are directly in the signal path, they have a noticeable influence on the sound and we believe the upgraded resistors offer a clear improvement to the sound of the already wonderful original AMB.org amp."
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when reading any ad copy from a company, i think it's important to try to separate the chaff from the wheat.
regarding the Black Gates, you need to try to reconcile ALO's statement with amb's technical information, lifted straight from the Mini^3 site:
Fully direct-coupled
There are no signal-degrading coupling capacitors at the input, output or negative feedback loop.
as for the resistors, substituting even spendy boutique parts here will still result in a cost differential equivalent to the amount of change you can pull out of your sofa in any given month.
i give credit to ALO for getting behind a solid design, but in the end they are a business and, like all other businesses, they need to justify their price tag. and when cold hard facts are scarce, flowery language takes its place. it's hardly a pioneering tactic in the audio world, though "extra rail stiffness" is a new one for me.
in any event, the case is a lot prettier than my plain Hammond. i gotta admit that :]
enjoy your new Mini^3. i find it pairs particularly well with Yuin PK1s and Grados.
imho, caveat emptor, and all that.