AKG K612 PRO Headphones Reviews

The K612 PRO is an upgraded model of the same positioning of the AKG K601. After the K701 replaced the K501 as the AKG flagship model, AKG introduced the K601 to replace the K501 position. Then the K601 is not highly regarded. In 2013, AKG updated the high-end. Headphone product line, K612 PRO, K712 and K812 are coming one after another. The K612 PRO is positioned in the thousand-yuan market. At present, the K612 PRO's national bank price is about 950 yuan, and the online shopping parallel price is less than 900 yuan. Thank you. A test sample is provided. As shown, this K612 PRO is made in China, not in early Austria.

AKG's line of headset models for professional monitors and high-end personal applications is actually very rich, such as the 20-year-old K240 series before and after, and the 6-head is a new model of AKG. The appearance of K712 has not completely replaced The original K701, K702, and even the Q701, K702 65th commemorative edition and other branches. Their sound styles are different, but the positioning is similar, the price has been around 2,000 yuan. Until the end of last year, the price began to adjust.

The price of K612 PRO generally reaches 800-900 yuan, and the price of K701 is reduced to 1000-1100 yuan. For AKG's own product line, K612 and K701 are theoretically compared with the traditional K240Studio and MKII models. With updated technology, the price difference has been greatly reduced. In the 500-1000 yuan, the high-end headphones that are recommended for high-quality sound quality have not been concerned except AKG and Philips models. Before the new K701 evaluation, Let's first look at the performance of the lower-priced K612.

From the appearance and wearing, no need to introduce too much, K612 PRO is still the traditional AKG shape, all-inclusive ear size and AKG's unique head frame structure, wearing comfort is very good. AKG will almost this The weight of the size earphones is controlled at about 230 grams. With the exaggerated headband, the pressure is very small, and the wearing comfort is good for a long time.

K612 PRO adopts single-sided incoming line, non-changeable line design, the earphone unit is traditional open design, there will be no small leakage sound [use will affect other people]. Officially given indicators, K612 PRO impedance 120 ohms The sensitivity is 101dB. It is slightly different from the 62 ohm impedance that has been used by K701, 702, etc., and the sensitivity of K702 is also 105dB [K702 62Ω/105dB, K240S 55Ω/104dB, K712 62Ω/105dB]. See the K612 PRO to reach the parameter. The same loudness of the K702 requires a larger output level of the source.

From the appearance of the photo, the K612 PRO uses the AKG Varimotion patented diaphragm, the center of the diaphragm is a dome structure, the outer ring is a ring diaphragm, the voice coil is mounted on the edge of the dome structure, the annular diaphragm and the center dome The diaphragm thickness of the structure is different.

In order to better test this headset, we carried out about 400 hours of downtime. Today's evaluation of the comparison of headphones mainly chose AKG K702 [Austrian] and AKG K240 Studio, because the new K701 just bought, only for Simple comparison. The test source is based on the music state Monitor 06 MX and Lotoo Paw Gold as the main reference, HP11 amp, HiFiMan EF6 amp, etc. as a reference. Also use mobile phones and portable players such as vivo X5Max as a reference.

Overall impression : Even on a mobile phone such as vivo X5Max, we can easily feel the strength of the K612 PRO as a thousand-yuan earphone. It still maintains the elegant, light and delicate style of AKG traditional high-end headphones. Some people say K601 is somewhat like K501. We haven't heard of K601, we can't confirm it. The sound density of K612 is not as light as the old K701. Under the aura of AKG's high-end headphones, K612 PRO really counts a slight emphasis on sound density, and the sound form is more tough. One. If you have different feelings about K501, you may think of it, but K612 PRO must be much stronger than K501.

High-frequency performance : The high frequency of the K612 PRO is still typical AKG style, the sound is stretched, the sound field is wide, but compared with the K701, 702, and even the more aggressive style Q701, its high frequency density will be better, a little more The young color, the instrumental music with some metallic taste is more crisp and the lines are clearer. For example, the violin will be brighter, the details seem to have more decorative taste, and the acoustic guitar is more popular, the sound is relatively thin. Thick, transient performance is faster. The high frequency of K701 is relatively open, soft and even a little floating, K702 is relatively restrained. In the performance of string high frequency, K612 PRO loses in resolution And win in terms of sound density.

No matter what kind of sound source, the difference between style and detail is not much different, but for ordinary style music, there will be some differences. High frequency and medium and high frequency part K702 has obvious resolution advantage, AB contrast will feel To K702, not only is the style more restrained, but also provides more and more "information volume", which makes the sound space more obvious. The K612 PRO is more popular in general pop music, electronic music is more dynamic, medium and high frequency is easier. Control. As for K240 Studio, the whole is not as good as K612 PRO, the high frequency of K240S will be crowded, and even some hair, the details of the big dynamic distortion is more serious, there is obvious sensation.

IF performance : the old K701 and K702's intermediate frequency, will not be particularly full on the 06 MX level sound card. From AKG K240DF to K501, everyone has always thought that AKG headphones are not easy to find a suitable amp, but from so many years In our experience, this view does not seem correct. They may wish to hear a solid or thicker intermediate frequency on K501 or even K701, but in fact this is not the style of AKG. AKG's intermediate frequency is relatively light and loose. Even when the sound source is not good, there is a feeling of looseness.

The K612 PRO is similar in style, but it is obviously more full than the old K701's midrange, and like the high frequency, the IF in the AKG headphones is hard to be "hard", even with a bit of explosive power and angularity. It is also inaudible on the K702. The advantage of this style is that on the K612 PRO, it will be found that the mid-frequency image and the high-frequency dynamics are better than the K701 and K702. Compared with the K240S, the slow intermediate frequency is different. The K612 PRO's mid-range frequency is even more crisp. Of course, it is not that its sound is hard, but it is harder than those of the AKG. The K612 PRO vocal performance is still slack, the mid-high frequency support is better, slightly biased. Bright. A little more young, less a lot of calm on K701, K702.

In the performance of the big dynamic symphony, the K612 PRO is not as easy to control as the K702 on the 06 MX level. The K612 PRO is a bit too hot, but the transient details are not as meticulous as the K702. For some metal textures, the sound is strong. The K612 PRO sounds better than the K702. But the sound level, the faster drums, etc., the K612 PRO can't keep up. Of course, the HP11 amp is improved. Similarly, the K702 can also perform better. it is good.

Low frequency performance : The low frequency of the K612 PRO has a rare sense of volume in the AKG headphones on the X5 Max. This difference is actually relatively small, but it is more obvious on the AKG headphones. In some popular music, K612 PRO Showing a relatively clean, slightly harder low-frequency style, it is very good to neutralize the low frequency of this kind of music, but in the dynamic low-frequency performance, K701 and K702 both show a very calm side, although dynamic Not so good, the volume is also very light, but the details are well controlled, even the BT drums can show good details. But the K612 PRO is obviously a bad grade in this respect, its sound is slightly stiff, analytical The force is also insufficient.

to sum up

Compared with K702, K701 and K240S, AKG K612 PRO has better overall quality than K240S, but it is slightly weaker than K701 and K702.K612 PRO shows a younger sound style in AKG high-end headphones, and more tough sound lines. The high-frequency and medium-high frequency sound density is better, compared with the restrained K702, it has better explosive power, and even the sound is more thorough. The high-frequency resolution of the K701 and K702 is also obvious, and the sound details are rich. In the high-frequency details of the music, they show a significantly higher level of sound than the K612 PRO, even in the excellent vocal performance of the recording, their style of calming is not the K612 PRO. And K612 PRO in X5 Max The dynamics displayed on such a portable sound source, or the medium- and medium-high frequencies that are sufficiently solid under the large dynamics of the 06 MX-level sound source, seem to be difficult to achieve with the K702. Compared with them, the overall sound details are in various aspects. Lagging behind, and in terms of style, K240 Studio is actually more balanced, the intermediate frequency is more solid, and the style seems to be less like the AKG high-end model. But as an old model with decades of history [I don’t know that it happened in different ages. Less change], indeed not as good as K612 PRO.K240 Stuido and K240 MKII are Soomal's strong recommendation products. Compared with the recent evaluation of the iron triangle M50x, the price is close, regardless of its use conditions [closed and open The style of the K612 PRO is equally obvious. Even considering the sound style, we prefer the AKG K612 PRO.