Summary: I normally don't write long or extensive reviews, but this product has really exceeded my expectations!
I recently bought a pair of NOS AKG K340 headphones from a Headfi member in Austria.
Pros: [With screen mod]: Exceptional detail, open soundstage, excellent instrument separation, excellent dynamics, speaker-like sound, a pleasure to hear!
Cons: Sort of uncomfortable, bass weaker than I like, hard to drive properly, mids/bass slightly slower than the treble., slight incoherence of mids/highs.
Summary: I bought the AKG K340 Electrostat-Dynamic System twice. The first pair was very worn out and sounded weird so I sold them after a while. I bought the second pair from Ebay, and this one sounded very different. I used the first pair with the Beta 22 amp which really struggled to drive it properly.
Summary: When I first began my career, I was looking for some inexpensive but good quality headphones for my personal reference. The K340`s were less expensive than the cream of the crop at that time, the Staxx system with the discrete amp, etc.
Pros: Long life, used in both studio, live sound, and for fun
Cons: after buying them new in 1987, the foam is a little worn, wire tension on the pods is a little loose
Summary: It's time for another review that I've been sitting on for a while. Writing a review of a vintage headphone is difficult at the best of times, and there are some strange features of the AKG K340 that are even more difficult to deal with.
Pros: musical, fun, stunning treble, no fatigue, forgiving
Cons: Requires monster amp, not especially detailed, a bit slow, slightly muddy bass, each pair is a bit different.
Summary: Letvægtsøretelefonerne AKG K 340 er forsynet med bløde gummimuffer, så de dels er behagelige at have på, dels sidder godt fast. Justeringen af volumen foregår ved, at man simpelthen trækker en cylinder op eller ned, da knappen omslutter ledningen helt.