Preface
Kuangshi is a mid-to-high-end veteran player and ear labour decoding all-in-one manufacturer. Its product quality is excellent and its global sales are very good.
Recently, with its leading acoustic technology, it has entered the market for mobile phone portability and decoding. First, the M12 with a very good reputation was launched, and then the M15, a more powerful HiFi professional-grade Type-c/Lightning/USB to 3.5/4.4mm portable earmatch. The M15 is equipped with top-level hardware configuration and various black technology technologies, making the M15 a top-quality device for portable small tail earmatch. How could the author not evaluate such a good product? So he participated in the M15 tour audition activity and gave birth to this review.
M15 hardware configuration explanation
Let’s first talk about the hardware indicators of M15. M15 is positioned as a mid-to-high-end, with a price of 1,499 yuan, and provides flagship hardware level. M15 supports two interfaces, including 3.5/4.4mm, of which the 4.4mm interface is better and has higher sound quality. The M15 is equipped with 2 high-power SIP headphone amplifier modules, and the ESS flagship ES9281AC chip is responsible for decoding, which can achieve the ultra-high decoding capability of PCM384KHz/32BitDSD256. After optimization through the amplification technology of the world's current module, it has received a bandwidth of up to 1MHz and an amazing 0.0003% limit distortion, and a high-end quality of almost 0 noise floor-to-0-db.
M15 also supports streaming media MQA decoding, TOREX precision power management control, ultra-low heat-free and low power consumption and other technologies. Even if the environment has entered a hot summer in actual testing, the M15 will not feel hot for a long time when it is used. M15 supports low gain and high gain modes. In terms of thrust, 3.5 interface RL: 300Ω, Po=11.97mW, 4.4 interface: RL=300Ω, Po=22.6. The author took the M15 to the headphone store for testing. The high gain mode can push 300Ω and below headphones. You can also try 600Ω high sensitivity headphones.
M15 supports streaming media MQA sound quality decoding
M15 supports MQA signals and completes the final full rendering and expansion of MQA files, allowing users to experience the charm of MQA sound quality, and supports lossless formats and decoding of major mainstream platforms such as MQA, ALAC, Flac. The author has measured that MQA decoding mode is very smooth.
packaging, accessories, workmanship evaluation
M15 packaging is very low-key. In terms of accessories, like portable earphones, small tail manufacturers, it provides a USB to 3.5mm cable and a Type-C to 3.5mm cable accessories. In terms of workmanship, the M15 uses CNC aluminum alloy + tempered glass to shape the body, which is very exquisite. The cavity is translucent and can see the internal components. The wiring design is very good, and the industrial style is very good. The circuit board has a design that optimizes shielding of anti-interference external signals, reducing interference with the mobile phone 5G/WiFi signal, and will not let the mobile phone 5G/WiFi signal affect the sound quality and cause noise floor. In actual tests, when cooperating with the front-end device, the M15 basically cannot hear any noise floor interference, and the background is pitch black and clean.
Wire evaluation
M15 Wire material uses a high-purity single crystal wire base to ensure the improvement of signal transmission and sound quality. The wire leather is made of nylon material and is durable. The author has tested the performance of M15 wires with bending resistance. The actual test effect is good. The bending operation is not easy to cause damage to the wire.
Thrust test
M15 supports low gain and high gain modes. In terms of thrust, 3.5 interface supports RL: 300Ω, Po=11.97mW thrust, 4.4 interface supports: RL=300Ω, Po=22.6 thrust.
thrust test environment is a comprehensive listening experience for direct plug-in mobile phone output and starting exclusive mode. In
exclusive mode, the M15 will have a higher thrust. If it is a high-resistance headset, the author recommends using the exclusive +4.4mm interface to listen.
Headset Thrust Test
Headset Test Headset Device: Panasonic HD7 Impedance: 44Ω, with certain requirements for front-end thrust.
Since the author has already had a head-mounted fever reduction, other high-resistance head-mounted models have been released, leaving only a very pleasant tuning Panasonic HD7. Let’s take the HD7 for a head-mounted evaluation. HD7 is more difficult to push the impedance is 44Ω, the sensitivity is not high, and it is more effective in front-end strength. In addition, the HD7 will be separated and formed into a paste under the feedback of poor front-end thrust.Next, start the matching test of M15 and HD7, and see if M15 can push HD7 well.
Start the test
M15 When driving Panasonic HD7 under 3.5mm interface , the separation of the three-band is good and the amount of information analyzed is also rich. The biggest feature of
is that the sound density is not laid off and reduced imaging density and improved resolution under the premise of good separation and resolution. The M15 imaging body is very specific and not weak. The instrument's sound color is bright, the vocals are rich, and the low-frequency transient condensation effect is good. It is easy to collect and release, and the popular rhythm is very exciting. The HD7 is driven by the M15 and feels a bit like listening to the TV. The sound is rich and healthy. After starting the M15 high gain mode, the sound field and sound atmosphere of the HD7 are further improved, and the amount of parsed information has increased. If the battery life is not considered, the high gain mode is a good choice. It pushes the HD7 very well, which improves the sound quality of the HD7.
in-ear test headphones: Visonic VSXS 80Ω
Visonic VSXS This plug has an impedance of up to 80 ohms, high resistance and low sensitivity. It made many HiFi enthusiasts stop at that time. It has extremely high requirements for the front end. If the front end thrust is not good, the driver VSXS will emit weak, narrow, and harsh effects, causing bad sounds.
However, VSXS has become less difficult to push after being driven by M15. In the M15 4.4 interface high gain mode, VSXS is easily driven to fully exert its strength. VSXS has a huge sound field, rich details, delicate voice, and low frequency is bouncing and powerful. Driven by M15, VSXS can maintain super high resolution. Many imaging detail particles that have not appeared before can be decoded and appear, allowing VSXS to hear more details.
sound is also rich in emotion due to its unique tuning. Whether it is a solo of classical instruments, pop songs, or singers' live solo, VSXS can play a sound full of emotion and atmosphere. It feels like VSXS is driven by a desktop decoding amplifier all-in-one machine. It has rich sound information, is very pleasant and not exciting. I have to say that the decoding strength and thrust of the M15 are very good, and you can feel the changes and good sounds with one ear.
Mobile Haibei APP launch exclusive test
Test interface: 3.5mm
Exclusive mode, the tuning style of the output sound source is mainly based on M15, and the phone's tone has little influence. In order to better measure the unique tuning style
This round of tests, the author chose professional monitoring headphones: American Mee audio Mx4 Pro One-Circle Sant Professional Monitoring Headphones
This headphone has no sound dyeing, and it does not deliberately reduce the density to improve the monitoring error correction function. The tuning is very natural and balanced monitoring orientation, which can accurately measure the sound orientation and tone of the front end, and will not misjudgment the sound of the front end because of the tuning of the headphones.
startup evaluation
M15 supports the mobile phone to start the Haibei APP and enable exclusive mode. In the exclusive mode, whether it is the 3.5mm interface or the 4.4mm interface output is very unique. Especially when you listen to the professional monitoring headphones of Mee audio Mx4 Pro, the unique tuning style is very obvious. The sound is loose and atmospheric, excellent transient, rich and delicate, and the emotional atmosphere is strong, as if you are listening to the warm and pleasant sound of the desktop decoding headphones.
High frequency has bright tone, rich overtone details, good extension, clear contours, warm and listenable, and the high-frequency instrument solo is very bright and transparent.
mid-frequency vocals have a slightly thick density, rich and delicate emotional rendering, and good analysis. The singer's breathing, exhalation, and bubble sounds can be heard. Listening to the voice is very emotional
is worth savoring slowly, especially listening to the old love songs in Hong Kong and Taiwan, which is so delicate.
low frequency has excellent transient state, which is indeed very good in this regard. The low frequency drumming cohesion and shape are cohesive and dynamic effects are very unique, with explosive power, precise imaging, elasticity, diving, and a sound-like effect, and a strong rhythm and atmosphere.
M15 resolution and resolution, sound field effect . If your headphones are of high quality, the sound of the M15 is far higher than that of 1499. It is not an exaggeration to say that it is a small desktop.
M15's sound field is grand, excellent separation, rich analysis details, and will not use the practice of increasing analysis and reducing sound density. The density of the instruments, vocals and sound details of the world's M15 is not weak, and the condensation and forming is concrete.
At this time, the author felt that the M15 was more and more valuable. It was portable and not expensive, and it could also be heard of the effect of the machine.
M15 computer sound card USB to 3.5mm test
M15 supports use as an external USB sound card. In the Windows 11 system mode, you can also choose performance options such as decoding channel, number of bits, Hz, etc., and support selecting a code rate of up to 32bits/384kHz, which is also very obvious for improving the sound quality of the computer.
M15 and computers are further enhanced in combination with the thrust. When using HD7 or VSXS headphones, small details such as the sound field, the amount of information analyzed, the tiny little overtones, are all parsed and imaged. The amount of information is full and listenable, and the sound is becoming more and more authentic and full of atmosphere, making listening to music a pleasure. Finally, I know what it tastes like with emotions, details and a wide sound field. I don’t need to spend tens of thousands to buy equipment to touch this excellent sound.
Test summary
In general, M15 is a very distinctive product. With the support of various black technologies, M15 has multiple functions, and its power consumption and heat generation are also very low.
has a very distinctive appearance and a sense of technology. There are unique characteristics in tuning. You can hear the unique characteristics of tuning without spending nearly 10,000 yuan to buy a unique desktop amplifier or player. Of course, the unique tuning quality is optimized in terms of very good hard qualities.
M15 also has a powerful thrust system, supports 3.5/4.4mm interface, and 4.4 pushing large ears and high-resistance headphones is easy. In one sentence, it is: M15 has the hard quality and strength like a desktop computer. The author thinks it is still worth it.
So I wish you a wish~ See you next time.
