I had the same question. The urban dictionary has someone describing in detail.  here's the link.  http://www.urbandictionary.com/define.php?term=djent

*They even mention line 6 pod

Quote:   "DJENT! DJEN-DJENT!"    Not to be mixed up with the ordinary "chugga-chugga" or "dun! dun-dun!".     

Djent is onomatopoeia for the sound your guitar makes when palm muting with a quick stop.  Chug is another name but Djent is more fun. 

Ola is using the stock cabs in that video. Stock on both Pod hd and Axe-fx.

Unfortunately Line6 decided to remove the basic feature to bypass cab/mic in the pod 300-400 models.

And also sending dry tracks.

Why? It's a must have feature for many studio and live users.

I hope they fix it soon with a firmware update.

good question, i'm still trying to make my pod hd500 sound like that...

>Mmmmm duel recto.  That video proves I don't need a real recto, but one day when I can hold off the Line 6 GAS I usually get long enough to save £3K..... Then a filthy djenty recto will be mine.

I'm not a Djent guy but my understanding from hanging out with lots of Djent players is that most Djent aficiandos do not like the Dual Rect for that style as the amps is "too loose" in the bottom end. Engl for example, is a more preferred brand of amp (example: Invader), alot of folks are hip on those new "Dar" amps as well (I think those sound terrible in the clips, I've heard, though). The DRs can certainly be setup and used for it, but they're not considered ideal is the vibe I get.

Ironically, a lot of the Djent guys use modelers, also. The Periphery guys used L6 gear before they went AxeFx as did Meshuggah.

It needs power.  You can use it with a guitar amp head or go direct to a PA or some other full range flat response amp like a keyboard amp.