UPDATE:
After many days of modding the Akg K 340 i must say, for the future owners of this absolute TOTL headphone, that the difference between a ****ty sound and a TOTL one with these cans is 2 things : a speakers amplifier with a good headphone out like my Sansui Au 7700 but MORE IMPORTANT THAN THAT :
damping them at the interior of the cups with sorbothane duro 70 1/10 inches with self-adhesive, and also around the cups some 4 or 6 patches of sorb. compressed with some elastic band , i know that many will mock that but i add some stones(agate+shungite) on them and sorbothane around the end of the cable, also put off the wool, and cut the plastic grid and replace it by a nylon of a woman underwear glued on the residual plastic ring, for example
....
Modulo all that this headphone is unbelievably superior to my 2 Stax and hifiman he 400 and also to the beyerdynamic dt-150 ,not by a thin margin but by many notch, this can are TOTL for less than 200 bucks,if you are lucky....Dont dream anymore to many thousand dollars headphones if you are not loaded with money, buy them and modded them like i described, you will be in heaven, they crush, even my audiophile Mission Cyrus 781 top of the line of Mission speakers already modded by me, with their superior musicality.... I ask to myself what would be the price of a can that are better than them with jazz voices for example? Many thousands bucks and i have no doubts about that.... All reviews of these cans that are not superlative are only testimonies of bad synergy, bad sources, bad amplifiers,
with no modding.... Trust me after 7 years i have the ONE, 3 weeks ago i was thinking that perhaps the modded beyerdynamic dt-150 or my Stax Sr-5 were the best i have ever have, now not anymore by an incredible difference in all aspects of the sound....All reviewers that speaks badly of them truly had never listen to them at their optimal level...
Note:
Some recommand a tube amplifier, the last i own was the Ember and my Sansui headphone out is better than it with my he 400 and the Akg K 340 with the sansui sound warm organic, tubelike, without any trace of harshness, or analytical dust, only total fluidity with very good bass and my version is the bass light one (for sure they will be very bad for some bass heads)....I am certain that a good tube amplifier is better than many ss speakers amplifier with them, but the Sansui AU-7700 is so good that any other top of the line Sansui will also be an exception to this consensus about tube amplifier ...I cannot pinpoint any too big and too evident defect about the modded AKG-K 340 now that some reviewers complaint of, except before i modded them they sound with the many evident defects some described.... Rightly modded and rightly driven you forget any residual slight defects they can manifest...Be it the discrepancies of the crossover in them, or the slower bass sound compared to the highs(Tylls review)...Their equilibrium at last with the right amplifier and mods are their redemption to the BEST buy quality/ price ratio in the TOTL realm of superior headphones....
After all they crush all my cans and my speakers in musicality because of
their mastership of the mid-frequencies where almost all the music and voices are most of the time and this said without speaking of
their spatial imaging power that make them more like a pair of speakers than a pair of headphone.... By the way the soundstage is not small and can be big but not artificially big , the soundstage has always detailed depth and can be wide also if the music ask for it....I think that any classical lover or musician, any jazz lover or musician, would be in love with them like i am already....