AKG K340 Headphones

To begin with, the K340 is a two-way system using the electret principle to cover high frequencies from about 4kHz upwards, and the conventional dynamic (moving-coil) principle for low and middle frequencies. The latter is unusual in having five passive auxiliary diaphragms arranged around the driven diaphragm to increase the radiated sound level for a given coil excursion. Reduced distortion is claimed over the lower frequency region. The electrostatic capsule is mounted just above the centre of the dynamic system and fed with high frequencies only via a special transformer, there being no crossover network as such.

Large circular ear-pads surround the ears and have a luxury covering with very soft inner padding. The headset is quite heavy but a spring loaded self-adjusting headband inside the main hoop gives a high degree of wearer comfort. The outside of the earpiece is enclosed and so there is some exclusion of neighbouring sound sources - but not enough to give complete privacy. The flat 4-wire cable is coiled to give uncluttered use at any distance from about 1 metre to the full 3 metres. The cable enters at the left earpiece.

Reproduction of music of all kinds had a depth and transparency which few loudspeaker systems can equal. One has to acclimatize to the divided stage presented by all headphone listening to stereo material, but the wide, clear tonal balance was very impressive. Sensitivity was average, and matching no problem, and really high listening levels could be achieved with amazingly little distortion.

With closed headphones it is important to have the ear-pads securely against the head if the bass frequencies are to be reproduced effectively. The K340 design ensures this, and indeed I found the bass excellent. The treble too was exceptional, with transients on voices and instruments crisp and natural. If the price does not frighten you, then I recommend you to try them. You will not be disappointed.