No, i've had enough experience with headphones in general to not be a troll.
You've clearly got pre 2011 dt770/600, which by trust of trustworthy headfiers are pretty good. But I dare you to go out and buy the new dt770/600 (This applies to the uk and in other places- as now all of these beyers come with the bass ports), then you'll see what i'm on about.
I was just checking this nfb-12 forum as I've shockingly come across something that makes a positive difference to it. Now I should say, i'm not here to argue as I haven't the time so i'll only say it once. And if you don't agree or do i'm happy for you either way.
Okay, i'm someone who likes to test things using two principles: Rigour and a $budget. I let my ears do the deciding but I pay very very special attention to making sure which test I do is as accurate, rigourous, bias free as possible. And enough $ so that I get a decent sample size.
I wanted to see what can improve the sound of a midfi dac/amp- the nfb- without actually replacing or tweaking internal components.
For the nfb, the setup was via usb out of a laptop plugged into a typical uk household mains.
-Difference (that i can detect) between usb cables? hmm..... .........
NO: used belkins/wireworlds/audioquest/others
BUT A BIG BUT: definately upgrade the stock cables to something like a £5 belkin as from experience often they have a loose connection to the usb ports and (a long long story cut short) cause BSOD's.
-Difference between 3pin mains power chord feeding the nfb? .....
NO: used QED/merlin tarantula/stock/others
-Does Galvanic isolation of the computers usb port via an isolator help? .....
NOT really (only tested olimex and one other one)
-Difference between internal pc configurations/tweaks like the ones found on ? well yes and no:
YES: configuring usb port connections/changing foobar or asio settings helped in reducing stutter, glitches and low level noise.
NO: ssd/partitioning/cpu or ram usage limiting/other more dangerous tweaks. Clean OS installs and getting rid of windows sound drivers may help for BSOD's.
-Using a mains conditioner make a difference?...
my god YES. Tested 3 random quality surge protectors and one mains conditioner- tacima 6 way mains conditioner. The tacima mains conditioner makes a notable difference to the sound, put it that way. It's not like skipping from an akg k271 to a denon d500 to the ed8 or something, as still the difference between headphones and for that matter the difference between a crap and well recorded track, are still the biggest ways to experience a difference at headfi in my view.
It just seems like this conditioner gives the nfb12 more power. More power to give a better bass response, soundstage and dynamics. Just feels like anything you listen to has more energy and is less laid back. And in case you're wondering I was very careful of volume matching.
So to summarise the only improvements i've manged to come across are:
-upgrading to a slightly better branded usb cable
-making sure that the laptop usb port that your dac/amp is connected to has no other driver installed on it and so is thus used by only your audio equipment.
-mains conditioner
And other notes:
- 3 laptops tested xp/w7, 2 different cities, a few different mains outlets.
- Enough different headphones used. shure se315, mx980, grado gr8, ed8, d500, k271.
- Only posted this as I thought maybe it might be interesting for a few people
- Quite a few of the products that I selected were discovered from whathifi's website.