If you want lame advice DON'T do this!

@mahgister 

Because so good headphone are , and the K340 is really good

I already have Sony's Signature headphone amp but not a reference set of headphones. I will checkout the K340's, thanks.

No BEWARE...There were not to my taste right out of the box...

It take me 6 months and 6 modification to like them ...

It is not an easy to figure out headphone...

But at 100 bucks pick them and sell me them after...

If you look for a microscope yours Sony  will be fine...

If you look for a three- D soundfield... AFTER optimization they beat most headphones... They crushed the 9 others i know to pieces...

😉

@mahgister

Because so good headphone are , and the K340 is really good

I already have Sony’s Signature headphone amp but not a reference set of headphones. I will checkout the K340’s, thanks.

FWIW, re headphones, mahgister is correct in the sense that good headphone utilization is not a walk in the park. If ones reference is headphones just plugged into a component’s afterthought socket they don’t know a good headphones systems potential. And it can be quite impressive, but it’s a journey and not necessarily cheap, especially in finding your sonic match. I was lucky in getting a very good system going though for about $1000. $450 for phones and $550 for dedicated amp. NLA so don’t ask.  But I did end up with other phones and amps that I now store in my closet. :-)

Here is a negative review of the K340 by a well known and competent reviewer Tyll Hertzens :

https://www.stereophile.com/content/two-vintage-akg-headphones-k240-sextett-and-k340-electrostatic-dynamic

Is he right?

No, not at all...

But what he experienced at first listening , i experienced it too...😊

The difference is that he listened to the K340 a few hours and pass to an another headphone more easy to figure out ...

Me i decided to optimize them...😁

There is no mismatch of the drivers as he claims and no comparison between my K340 before optimization and AFTER...

I wrote that because you must know what you will go for before buying ...

By the way i bought by curiosity the K240 too...

So good they are and they are, they dont touch the K340 by far...

I bought them because i wanted to check the passive resonators workings in these two...

Dr. Gorike who designed them was not a mere headphone designer, but a physicist and a genius in acoustic , and one of the founder of AKG ... The K340 was the greatest of all their flagship some compared it to the Onega Stax...But it is even better because of their natural deep  bass and a better 3-D holographic image...

A i will never upgrade it...The acoustic soundfield of this headphone cannot be replicated by one singular membrane headphone  with no acoustic resonators and an empty singular acoustic chamber...

It’s all good fun but in terms of results, the problem occurs when people have big goals but no interest in learning how to get there effectively as needed.

But again its just a hobby not something both critical to society as a whole and complex, like understanding global warming, so as long as people enjoy their ride its all good and we all will be OK in the end........or will we??