The author recently had the honor to Love to play computer games I got a chance to make a machine, and I really made a machine. Don't get me wrong, it's the machine of opportunity, not the foundation. This time, the author tested a headset, Ostray's Nirvana KC08. Before the evaluation, the author visited the official website of Ostrael, and also went to JD, Tmall, and Taobao to check the evaluation of buying this headset. It was good and highly praised. Of course, I have to experience it personally, and I begin to feel it.

Unpacking

I don't know why, the earplug sleeves didn't stay in their original position, and they ran to the top before they were unpacked. But it doesn't matter. From the parameters on the back of the box, the distortion of this earphone is less than 1%, and the range of audio response is also more conservative than that of similar products of Sennheiser. The rated impedance is much higher than Sennheiser, and the sensitivity is the same. It can be seen that Nirvana KC08 has a wider range of application machines.

However, the author contacted the manufacturer. After carefully observing the B&K test curve analysis atlas of the manufacturer's professional instruments, it is clear that Nirvana KC08's performance is superior to that of Sennheiser at the same level. See the figure below.

The above figure shows the first harmonic, the second harmonic and the third harmonic respectively, and the following figure shows that the distortion of the biological diaphragm is very low. This chart is the B&K test curve chart provided by the manufacturer. In addition, the thickness of the earphone diaphragm is very thin, which is the thinnest thickness that the current earphone technology can achieve. It is not too much to say that it is the black technology in earphones.

Overall appearance

Ear plugs are particularly noble and elegant when they are fixed on the metal frame. This rock winding box is particularly practical and has a large storage space. Earphones of other brands can also be used. The official website can be purchased separately at a price of 39 yuan.

The audio cable of the headset uses braided cable with good hand feel, which is much more flexible and durable than nylon material, and will not harden in winter.

Detail analysis

Let's start with the metal piece used to fix the earplug sleeve. It is not polished smooth enough. Some burrs are still sharp. If you are not careful when holding the earplug sleeve, you may cut your hand.

The clip of the hoop wire is not disposable and can be reused. Even if there is no coil storage box, there is no need to worry about the wire being tangled with this clip.

Details are the devil, showing delicacy everywhere.

A small protective sleeve is specially made for the earphone plug, which can be put on when not in use.

At present, the gold plated plug is basically the standard configuration of the headset. It seems that Nirvana KC08 has enough gold plating. A comparison will be made later.

Next, we will mainly observe and analyze the core part of this earphone, the flat earbuds.

The titanium plated metal back cover, titanium alloy acoustic cavity and full polish mirror treatment make the appearance really impeccable. According to the manufacturer, the metal sheet of the back cover is processed by six blades of the five axis engraving machine at the same time, and only one piece can be processed every 20 minutes. A small pair of earphones can only be processed after more than 200 processes. The raw materials of the diaphragm are imported from overseas and meet European standards. Is this a bit foreign? A home-made self-developed earphone can be made to look like this. No matter how it sounds, the author should give a praise first. Not for anything else, just for that persistence.

Auditory analysis

After receiving the headset, the author listened to it first. According to the manufacturer's prompt, the author used the iPhone 6S and vivo X7 to play music. The manufacturer said that this earphone is mainly adjusted for mobile phones with Apple, Samsung and other models, and domestic mobile phones X7 and I5 are also within the range of models adjusted by the manufacturer. However, it may be because there is no cooker yet. When using the X7 to play, when listening to a relatively soothing song, the vocal part floats a bit, and it seems that the singer is out of breath. The same song doesn't feel like this when played on 6S, which means that 6S is better at expressing songs than X7 when there is no burn in? Well, I tested earphones, not mobile phones. When listening to rock songs with strong bass, there is no phenomenon of voice floating.

While taking photos of the headset, the author uses the X7 to burn the headset. Because the X7 battery is much larger than the 6S, and its endurance is better than the 6S, it also saves the trouble of frequently charging the phone. Because the rated impedance of Nirvana KC08 is 32 Ω, the author did not start the machine from the lowest volume, but adjusted it to about a quarter of the volume. It lasted about 20 hours, then changed to the lowest volume for 20 hours, and then changed to half volume for 12 hours. Next, the author intends to slowly and normally break in Nirvana KC08 in daily use.

The diaphragm and voice coil of the earphone are made of materials with high compliance. Its internal structure is not so stable at the initial qualitative stage, so the compliance is also relatively small, that is, relatively stiff. Only after a long time of movement, the distance between molecules becomes longer, and the distribution becomes more uniform, can the consequent compliance increase. The distortion of new earphones is greater because the mechanical compliance of diaphragm folding rings is not so good. It is because the lower potential of bass is not enough, the sense of volume is small, the sound is not soft enough, the mid frequency is not soft enough, and the treble is rough and sharp.

Because Nirvana KC08 uses high-quality materials to make diaphragm and voice coil, the sound will be smoother and the distortion will be reduced to a very small range after the artificially accelerated aging of headphone components in the cooker. Not all earphones need to be warmed up. On the contrary, the sound quality of earphones with poor materials may decline more after being warmed up.

In addition, it should be noted that soft music should be used in the machine. Never use a heavy metal music machine, which may cause irreversible damage to headphones. This time, the author used Lisa Ono's "fly me to the moon", a single cycle cooker.

Is the gold plating amount of Nirvana KC08 more sufficient for the author's three earphone gold plated plugs? It's almost impossible to see that the black one has been gilded. They really are gilded plugs, not silver ones.

Nirvana KC08's diaphragm is based on the bionic technology of human eardrum. Thanks to the voice coil drive unit of 16mm CCAW, the low-frequency performance is excellent after the cooker. The sound field is an advantage of the flat plug, and the transient performance is also good. The actual auditory performance is better than that of Sennheiser at the same price, because the sealing of the flat plug is not good, In the evening, a person's careful taste will be more perfect in the dead of night.

I always believe that sound has color. Different melodies should be matched with different colors, which is the resonance generated by the convergence of music and soul.

Through layers of fog, we can see the future from the past, and then return to the past from the future. Where am I now? After Nirvana, will it be reborn?

summary

Where you come from, where you go back.

This flying saucer shaped box has a pleasant name of rock. I hope our feelings for music are as solid as rock.

As the flat head earphones are declining today, Nirvana KC08 is launched. In addition to the improvement of quality and the differentiation route, I think the designers consider more about feelings. After all, when out of the street, because of the poor sound insulation effect, it is not as practical as earphones. If you are at home, you have more choices. You can use headphones or audio. Of course, Nirvana KC08 is also a good choice.

If you are a fan of flat head earphones, don't miss this Nirvana KC08. Even if you don't use it to listen to music, it is also a fine flat head earphone worth collecting, even as a collection.

At the end of the article, we provide the manufacturer's microblog account @ OSTRY Technology, play music, exchange @ Qianhai Jaws, and the author's personal microblog account @ Geek for experience. We welcome audiophiles and interested listeners to come for consultation and academic discussion.