w00t! Updated blu-tac mod:
Apparently, the big blob of blu-tac I placed behind the driver's magnet was absorbing all the bass. The deep bass is there, but barely heard.
So I stuck a 1 sen coin on top of the blu-tac to reduce the surface of blu-tac, and to add more weight/inertia to the base of the driver unit. Bass amount has been somewhat restored... not quite as much as un-modded 668B, but the kick drums & double bass's sound as tight as Demi Moore's forehead on botox overdose!! =D
QUOTE(zoney @ Dec 31 2010, 02:13 AM)
Bro, how much to un-bend? Cos I scared I break the steel cable lol. BTW the tissue paper mod, can clarify where to put the tissue paper, cos me confused where to put and hw much to put. Thanks for ur help

Bro, it's a steel cable for goodness sake. STEEL yo!!! Don't worry. There's no friggin way to break it.

In fact, you'd have to use a bit of strength to straighten it out a bit.
As usual, do it bit by bit... until you find the death clamp is comfortable. Mine has very light clamping force---literally just sitting next to my ears. I can wear it all day. But it's a bit too loose, if I move my head around, it falls off. =P
I use the soft tissue that comes in a box, not those in rolls used in toilets.
I use 2 ply of tissue for the front half and 3 ply for the back. Use as much as you want. It's no biggie.
Just fold it in half and roll it nice and tight. Then slide it under the earpads. It should look like this --> ( )
The ori modder mentioned that it improves the bass or something like that. For me, it's adds comfort---I have ears like Dumbo the flying elephant.
Added on December 31, 2010, 3:55 amQUOTE(joker_jr @ Dec 31 2010, 02:29 AM)
Received my hd 688b n 681 today.
actually only interested with 688b after little bit reading the review on the net but order 681 from trio out of curiosity
Testing my hd 688b with listening 3 album non stop -
Metallica S&M, Epica - Consign to Oblivion (Symphonic metal) and Scorpions - Moment of Glory (with Berlin Orchestra). all flac
directly connect to laptop without dac or amp. somehow my nokia n900 cannot drive this thing.
this headphone stuck on my head nearly for 4 hour. lol
Craving for more bass. I wonder if bass sound could increase if properly amped.
The other headphone can I access currently just Portapro, Beats by dre and Razer Orca.
only recently started this hobby, dunno how to compare but
I like the 668b sound better than razor orca. the good thing about orca is i can use it directly with my nokia n900.
portapro n beats i thinks in different category.
not yet open the 681. maybe tomorow....
That Orca thing is the fugliest piece of crap I've ever seen. By gawd is it an abomination. LOL!
Let it burn in a few hundred hours first. The bass will increase & decrease as it burns in (weird, I know), before it settles.
This post has been edited by iamyuanwu: Dec 31 2010, 07:05 PM