Today, we finally "welcome" the last member of the AKG 7 series headphones, AKG K712 PRO. Why do you want to say "finally"? Because we have already evaluated the early and 2015 versions of the AKG K701, we have evaluated Q701. K702 and K702 65th and K7XX [a special channel version of 65th]. K712 PRO, according to the family generation, should be the iconic model of the new generation 7 series. In 2013, it was released simultaneously with K612 PRO, 812 PRO, positioning Replacing the position of K701 and K702. The naming of the end of PRO adopted by AKG further strengthens its meaning for professional applications [K702 is said to be more targeted to professional applications]. K701 has also been decentralized to the thousand-yuan price in the last year. K712 The price of PRO is about 2,000 yuan, and the price of K702 65th commemorative edition is around 3,000 yuan [limited production discontinuation].
There is no need to talk about the objective information of the K712 PRO. Compared with the K701 generation, the K712 PRO has little change. Although there is no fine measurement, it is estimated that there is no difference in the dimensions of the K7xx family. K712 PRO image Q701, K702 65th, add a striking color decoration to the details. K702 65th is blue, Q701 has three colors and K712 PRO is relatively dark orange. At the same time, its earphone cable also uses the same orange. The wire and the appearance of the earphones are the same color, or the design used on the green version of the Q701. Apparently the color does not affect the professional positioning of its PRO.
From the objective indicators commonly used in headphones, the K712 PRO has no difference with K702 and K701, 62 ohm low impedance design and 105dB sensitivity level. In K712 PRO, we specifically talked about 3dB enhancement at low frequency. What is the performance? This is only a combination of subjective listening.
Since there aren't too many fresh objective indicators to describe, we are going to gossip about AKG's several headsets for the first time. Everyone has the possibility to remove the ear pads, it is easy to see the diaphragm of the headphones. AKG multiple headphones The patented Varimotion structure has been used. However, the main point of gossip is not here. Look carefully at the surface of the diaphragm. At least the surface of the K701 and K702 diaphragms we have seen will have larger particles or impurities of the size left by the composite. Or do you have a few small dots that are concave or raised, or have a very small swarf of 1-3mm? This is completely absent on the K702 65th. This also exists on the K712 PRO. Ok, gossip It ends here.
Due to the consideration of the user test cycle, we have been down after receiving the headset, about 15 days, the K712 PRO's downtime is limited to this. The test comparison headphones mainly use AKG K701, K702 and K702 The 65th three models. The audio source part uses the music state MD11 decoder, HOLO Audio, and the HP11 amp as the main reference. At the same time, Monitor 06 MX headphone output, FIIO X5K player, etc. are also used as auxiliary reference.
Overall impression : When I just received the K712 PRO, I probably used a mobile phone to listen to it. I feel that the high-frequency detail of the K712 PRO seems to be better than that of the K701. It is not easy to have a sense of hairiness when the dynamic is not small. Evaluation and use In the process of comparison, we can be sure that the high-frequency and mid-high frequency parts of the K712 PRO are the highlights of this model. You certainly won't notice any changes in the 3dB low-frequency boost. Of course, don't expect the AKG style to happen too much. Change [K812 PRO changes are bigger than these models].
High-frequency performance : The diaphragm material of the K712 PRO may have changed. Whether it is the extraordinarily restrained K702 or the new K701 version, their high-frequency resolution is worse than the K712 PRO. Compared with the old one. K701's high frequency that is more relaxed, the high frequency of the K712 PRO is naturally compact, and the density is greatly improved.
From mid-range to mid-high frequency, the K712 PRO not only has excellent density, but also has a finer sound than other 7-series headphones. If the new version of K701 improves density and dynamics, then its graininess actually follows The amplification and the density of the K712 PRO are better, the connection between the middle and high frequency parts is more balanced, and it is very delicate. This kind of fineness also has a positive influence on the extension of extremely high frequency, but the relative density is relatively high. It will be too stretched, and the impact on the resolution of extremely high frequencies is actually not very large.
In the AKG 7 series of various earphone styles, the high frequency of the K712 PRO and the density of the mid-high frequency part can be enhanced. It makes the sound of the violin, trumpet and even the female voice more gorgeous and has a metallic texture. And more delicate. Don't look at the official parameters of the 7 series headphones are the same, K712 PRO should be the most easy to drive one, in the high frequency and high frequency sensitivity, K712 PRO is obviously higher than K712 and K702 65th, from the sound source From the output voltage of the terminal control, to achieve the same sound pressure, the K712 PRO is 2-3dB less than the K702 65th.
But in the K712 PRO, I can't find the shadow of the old version of K701. Although the high frequency of the old version of K701 will appear somewhat floating on many sources, the fast and elegant performance of the very high frequency is very characteristic. Compared with the K702 65th, how about the K712 PRO high frequency? In the K702 65th evaluation, we have repeatedly emphasized the overall style of its stretch and balance. The K712 PRO is clearly leading in density, while the sound field and dynamic aspect are K702 65th better. I like the K702 65th's more stretched performance and the balance between restraint and stretch. The K712 PRO is more modern and younger. The high frequency is easy to drive, and the details and levels are easy to express, but The stretch is not enough, the sense of space is slightly weaker [compared to K701, weaker than K702 65th]. Compared with K702 65th and K712 PRO is easy to describe, the former's voice is more relaxed, calm, and the latter sounds delicate, full, and stronger texture.
Mid-range performance : Entering the performance of the intermediate frequency and vocals, it basically returns to the overall taste of the AKG 7 series headphones. If you have not studied the various AKG 7 series headphones, you may feel that their styles are very close. The same is true. The K702 65th's mid-range is particularly fascinating, and the control for large dynamics is just right. The K701 mid-range is slightly higher, and the sound is lighter, although the new version of the K701 has improved significantly, thickness and dynamics. Ok. But it's also a slightly younger style. The K712 PRO is probably closer to the K701 new version of the sound in the midrange. But like the high frequency performance, the K712 PRO is still more delicate and dynamic. Better performance. Compared with K702 65th, if the sound source or amp part is enough, then K712 PRO and K702 65th are dynamic strength, and K701, K702, etc. are one level.
In terms of vocal performance, the K712 PRO is more powerful, and the thickness and texture are close to the K701, but slightly different. In the performance of the male voice, the thickness of the K712 PRO and the resolution of the sound are more likely to show advantages, but this advantage And the style is obviously more biased towards the aesthetics of music in recent years. K702 65th should still belong to a more conservative aesthetic tuning, whether on the HP11 or FIIO X5K, as long as the warmer sound source, let the K702 65th's mid-range exceptionally stretch, Relaxation. Maybe the knot is slightly behind, but for the vocals, just like the charm of the paper cone in the speaker, the K702 65th is better. The K712 PRO really looks like a More advanced "new products, have better details, but the details do not represent all.
Low-frequency performance : In the official promotion of the K712 PRO, 3dB low-frequency enhancement is mentioned. If you are familiar with these AKG headphones, you know that AKG is never known as low frequency. As mentioned earlier, you will never pay attention to this when using this headset. The low frequency has been enhanced. If it is not officially written, we will not compare whether there is any enhancement. Compared with the K702 65th, the K712 PRO's low frequency dynamics are weak, and its sound is tight. The K702 65th's mid-low frequency and low frequency are very slack. However, the K712 PRO's low-frequency boost should be in a relatively low frequency range. In the deep dive, the K712 PRO's low-frequency atmosphere is slightly better. The same is true for K701 and K702. However, overall, the K712 PRO still maintains a low-frequency sense of the AKG 7 series, which is relatively low-profile, relatively light style. But if there is a good fit of the amp, its low-frequency details, low-frequency resolution and texture, Still a relatively slack and delicate class [K712 PRO is just not 702 65th slack, but not tight, hard].
Sound source matching : K712 PRO is relatively easy to drive than K702 65th and K701, K702. In the dynamics of medium frequency and medium high frequency, when it is equipped with mobile phones such as FIIO X5K or vivo X5Max, it is relatively easy to get more solid and solid. Sound. Of course, with the FIIO X5K, the player has become a bit more difficult. Listening to vocals, some small dynamic music, high-quality jazz, etc., it is relatively easy to show that the K712 PRO is significantly better than the K701. And with the HP11 amp or better amp, the K712 PRO is much easier to match than the K701. Its high frequency is easy to control, it is difficult to get a burr, and the medium and high frequency density is mentioned above. And the dynamic performance is good. So it is recommended to match the sound source and amp with a little restrained sound.
to sum up
Overall, the AKG K712 PRO is well-deserved as an upgraded model of the AKG K701 or K702. Based on the general sound style, the K712 PRO also shows its details in terms of sound details, especially in the mid-high frequency range. Obvious advantage. Perhaps it is really considered as a professional application, K712 PRO is no longer as individual as K701, and not as beautiful as K702 65th. Its style is somewhat close to the neutral direction, of course, this trajectory change is only very small. The K712 PRO still has the style of AKG K series open professional headphones for many years. The sound field is wide and the sound is stretched. The middle and high frequency parts have a relatively more stretchy and delicate style. The low frequency part is lighter and pursues slack. And the performance of the details. The dynamic low frequency is not very good at it.
As the higher price K702 65th is also good enough with the sound source and amp, we think it is very different from the K712 PRO. But we also doubt that every K702 65th and our hands Only the same performance? At least the Massdrop K7xx we tested later is still different from the K702 65th. Of course, the difference between the two is very clear. I believe that not only me, we Many enthusiasts around us must like the sound of K702 65th. Of course, precisely, this K702 65th.K702 65th in our hands is atmospheric, stretched, and the sound is more intimate and delicate. The K712 PRO shows a more modern aesthetic. The pursuit of "fine" is the detail that shows more sound.
High-frequency performance : The diaphragm material of the K712 PRO may have changed. Whether it is the extraordinarily restrained K702 or the new K701 version, their high-frequency resolution is worse than the K712 PRO. Compared with the old one. K701's high frequency that is more relaxed, the high frequency of the K712 PRO is naturally compact, and the density is greatly improved.
From mid-range to mid-high frequency, the K712 PRO not only has excellent density, but also has a finer sound than other 7-series headphones. If the new version of K701 improves density and dynamics, then its graininess actually follows The amplification and the density of the K712 PRO are better, the connection between the middle and high frequency parts is more balanced, and it is very delicate. This kind of fineness also has a positive influence on the extension of extremely high frequency, but the relative density is relatively high. It will be too stretched, and the impact on the resolution of extremely high frequencies is actually not very large.
In the AKG 7 series of various earphone styles, the high frequency of the K712 PRO and the density of the mid-high frequency part can be enhanced. It makes the sound of the violin, trumpet and even the female voice more gorgeous and has a metallic texture. And more delicate. Don't look at the official parameters of the 7 series headphones are the same, K712 PRO should be the most easy to drive one, in the high frequency and high frequency sensitivity, K712 PRO is obviously higher than K712 and K702 65th, from the sound source From the output voltage of the terminal control, to achieve the same sound pressure, the K712 PRO is 2-3dB less than the K702 65th.
But in the K712 PRO, I can't find the shadow of the old version of K701. Although the high frequency of the old version of K701 will appear somewhat floating on many sources, the fast and elegant performance of the very high frequency is very characteristic. Compared with the K702 65th, how about the K712 PRO high frequency? In the K702 65th evaluation, we have repeatedly emphasized the overall style of its stretch and balance. The K712 PRO is clearly leading in density, while the sound field and dynamic aspect are K702 65th better. I like the K702 65th's more stretched performance and the balance between restraint and stretch. The K712 PRO is more modern and younger. The high frequency is easy to drive, and the details and levels are easy to express, but The stretch is not enough, the sense of space is slightly weaker [compared to K701, weaker than K702 65th]. Compared with K702 65th and K712 PRO is easy to describe, the former's voice is more relaxed, calm, and the latter sounds delicate, full, and stronger texture.
Mid-range performance : Entering the performance of the intermediate frequency and vocals, it basically returns to the overall taste of the AKG 7 series headphones. If you have not studied the various AKG 7 series headphones, you may feel that their styles are very close. The same is true. The K702 65th's mid-range is particularly fascinating, and the control for large dynamics is just right. The K701 mid-range is slightly higher, and the sound is lighter, although the new version of the K701 has improved significantly, thickness and dynamics. Ok. But it's also a slightly younger style. The K712 PRO is probably closer to the K701 new version of the sound in the midrange. But like the high frequency performance, the K712 PRO is still more delicate and dynamic. Better performance. Compared with K702 65th, if the sound source or amp part is enough, then K712 PRO and K702 65th are dynamic strength, and K701, K702, etc. are one level.
In terms of vocal performance, the K712 PRO is more powerful, and the thickness and texture are close to the K701, but slightly different. In the performance of the male voice, the thickness of the K712 PRO and the resolution of the sound are more likely to show advantages, but this advantage And the style is obviously more biased towards the aesthetics of music in recent years. K702 65th should still belong to a more conservative aesthetic tuning, whether on the HP11 or FIIO X5K, as long as the warmer sound source, let the K702 65th's mid-range exceptionally stretch, Relaxation. Maybe the knot is slightly behind, but for the vocals, just like the charm of the paper cone in the speaker, the K702 65th is better. The K712 PRO really looks like a More advanced "new products, have better details, but the details do not represent all.
Low-frequency performance : In the official promotion of the K712 PRO, 3dB low-frequency enhancement is mentioned. If you are familiar with these AKG headphones, you know that AKG is never known as low frequency. As mentioned earlier, you will never pay attention to this when using this headset. The low frequency has been enhanced. If it is not officially written, we will not compare whether there is any enhancement. Compared with the K702 65th, the K712 PRO's low frequency dynamics are weak, and its sound is tight. The K702 65th's mid-low frequency and low frequency are very slack. However, the K712 PRO's low-frequency boost should be in a relatively low frequency range. In the deep dive, the K712 PRO's low-frequency atmosphere is slightly better. The same is true for K701 and K702. However, overall, the K712 PRO still maintains a low-frequency sense of the AKG 7 series, which is relatively low-profile, relatively light style. But if there is a good fit of the amp, its low-frequency details, low-frequency resolution and texture, Still a relatively slack and delicate class [K712 PRO is just not 702 65th slack, but not tight, hard].
Sound source matching : K712 PRO is relatively easy to drive than K702 65th and K701, K702. In the dynamics of medium frequency and medium high frequency, when it is equipped with mobile phones such as FIIO X5K or vivo X5Max, it is relatively easy to get more solid and solid. Sound. Of course, with the FIIO X5K, the player has become a bit more difficult. Listening to vocals, some small dynamic music, high-quality jazz, etc., it is relatively easy to show that the K712 PRO is significantly better than the K701. And with the HP11 amp or better amp, the K712 PRO is much easier to match than the K701. Its high frequency is easy to control, it is difficult to get a burr, and the medium and high frequency density is mentioned above. And the dynamic performance is good. So it is recommended to match the sound source and amp with a little restrained sound.
to sum up
Overall, the AKG K712 PRO is well-deserved as an upgraded model of the AKG K701 or K702. Based on the general sound style, the K712 PRO also shows its details in terms of sound details, especially in the mid-high frequency range. Obvious advantage. Perhaps it is really considered as a professional application, K712 PRO is no longer as individual as K701, and not as beautiful as K702 65th. Its style is somewhat close to the neutral direction, of course, this trajectory change is only very small. The K712 PRO still has the style of AKG K series open professional headphones for many years. The sound field is wide and the sound is stretched. The middle and high frequency parts have a relatively more stretchy and delicate style. The low frequency part is lighter and pursues slack. And the performance of the details. The dynamic low frequency is not very good at it.
As the higher price K702 65th is also good enough with the sound source and amp, we think it is very different from the K712 PRO. But we also doubt that every K702 65th and our hands Only the same performance? At least the Massdrop K7xx we tested later is still different from the K702 65th. Of course, the difference between the two is very clear. I believe that not only me, we Many enthusiasts around us must like the sound of K702 65th. Of course, precisely, this K702 65th.K702 65th in our hands is atmospheric, stretched, and the sound is more intimate and delicate. The K712 PRO shows a more modern aesthetic. The pursuit of "fine" is the detail that shows more sound.
INT Metal Products Factory , http://www.libometal.com