Which reminds me.
I forgot to clean out my tea equipment before I went on a vacation so there are a teeny tiny bit of... well... fungi. I'll clean it right now and enjoy a delicious cup of sencha right when my equipment is out of the dishwasher.
I salute you good sir.
LOL, I just noticed that haha
"Welcome to head fi! Sorry about your wallet"
Now as complimentGuy, I Panda, deserve some compliments too!
Ok :(
But I like being spoiled 
Oh wait, now I remember! Tilpo, do you know if that hum in the Mini3 is a design characteristic or a defect of some kind? I know it doesn't appear when a signal is present, but for me that would still annoy the crap out of me (personally).
And secondly, would you say that the MRB doesn't lack LF punch at all, or just not to the the degree that bowei006 noticed?

Oh wait, now I remember! Tilpo, do you know if that hum in the Mini3 is a design characteristic or a defect of some kind? I know it doesn't appear when a signal is present, but for me that would still annoy the crap out of me (personally).
And secondly, would you say that the MRB doesn't lack LF punch at all, or just not to the the degree that bowei006 noticed?
I wouldn't say lacks a punch, it just does it differently in a way that as an EDM lover, I don't prefer. The mid bass is not as tight as say an NFB or O2 and is a bit flat feeling(when I say flat, I mean it like Soda pop flat, not much..feeling, not neutral flat) with sub bass that I can't agree with at all.

Okay thanks! I'm in the middle of an O2 build right now. Just trying to see what I should line up next. 

I wouldn't say lacks a punch, it just does it differently in a way that as an EDM lover, I don't prefer. The mid bass is not as tight as say an NFB or O2 and is a bit flat feeling(when I say flat, I mean it like Soda pop flat, not much..feeling, not neutral flat) with sub bass that I can't agree with at all.
Originally Posted by Tilpo 
I personally have not found any sound quality difference between the MRB and Mini3, so no defect in both either. As far as I'm concerned they're fully transparent. I don't think the MRB lacks punch at all, but it may just be me. That's why I found it worth noting Bowei's impressions in my review.
Hmm, two contrasting impressions... I probably don't want to go for both, so it looks like I have a decision to make.
The DIY is $110-$120...and you have to build it yourself and it's not that powerful, there are better dedicated amps at this price.

The O2 isn't even really a portable unit? It's portable in that it COULDhave batteries in it, but it's already minimal size which is squarish and largeish and interface makes it not really a portable unit generally. The JDS labs isn't even portable either.
It's a desktop unit with option for batteries

¯\(°_o)/¯
I have a Custom O2 made for high performance desktop usage only. It has no batteries and uses the A/C. The powersupply is connected to my UPS and inverter.
I have actually rarely used my O2 on high gain :/