Modern people go to work with computers, and computers have become the main medium for playing music indoors. However, computers are not audio, they are directly plugged into the computer to listen to music. The sound must not be durable, and it is not satisfactory. Everyone knows that they want to get Good voice, be sure to use a DAC, let the digital audio skip the computer's processing, and then with a pair of good headphones, you can enjoy the beautiful sound. However, many DACs are not expensive, otherwise it is bulky, and the price of headphones It has also been climbing up, it is difficult to teach people to start.
Is there any headphone system that doesn't take up space, and the price is affordable? Of course! Optoma Nuforce has a very strong marketing power, and recently launched a special combination of NE750M ear canal DAC + μDAC3 mini DAC ear expansion, the price is even more than a pair Tide brand headphones are cheaper and more tempting. However, is the sound of this earphone system as fascinating as the price? Recently, this system sent the evaluation of this site, let me tell you slowly.
This time with the USB DAC + ear-amplifier μDAC3, it is not the first time to visit this site. As early as March of this year, μDAC3 has been sent to the station with the NE800M ear canal earphones of the same factory, let this site editor Cai Chengrong This equipment μDAC3 left a good impression.
The μDAC3 sent this time is a red version. The surface of the aluminum alloy case is finely sanded and anodized, which makes the surface of the μDAC3 shine brightly and looks more fashionable than the black version sent last time.
The size of the μDAC3 is 68 x 38 x 21mm, which is smaller than the area of ​​the palm. It may be officially limited by this size. The USB input of the μDAC3 uses a smaller form of Micro B instead of the usual Type B, and adopts USB 5V. Power supply. Although the fever line designed for the Micro B USB jack is not common, users can plug the μDAC3 into the computer if they have a USB charging cable for the Android phone. No need to find another Type A- Type B USB transmission line, very convenient.
Open this mini DAC ear extension, you can find that the internal circuit is divided into upper and lower layers, the lower layer of the larger circuit board is a digital analog conversion circuit, the upper layer of the smaller circuit board is an analog expansion circuit. Although the upper and lower layers of the circuit board have been stuck Can not be disassembled, but from the gap, it can be seen that this machine is equipped with SaviAudio Bravo SA9027 decoder chip, so that this machine supports asynchronous USB transmission, digital audio sampling rate can support up to 24 bits / 96 kHz PCM files and 2.8 MHz DSD audio file. Although the current DAC specification has been supported to 32 bits / 384kHz PCM file, but the Hi-Res format audio file acquisition pipeline is still limited, if you just want to listen to yourself from the CD The digital file or the music on the streaming platform such as Spotify, Apple Music, KKBox, etc., the specifications of μDAC3 are more than enough.
The headphone output hole of μDAC3 is 3.5mm. Although it is only powered by USB, according to the specifications provided by the original manufacturer, the output power of each channel can reach 80mW under 16 ohm resistance. It is believed that the general low impedance ear canal earphone is not a problem. In addition, the μDAC3 also has a digital coaxial terminal and a pair of analog RCA output terminals. It can be used as a DDC and a two-channel DAC. It has various functions and is more flexible with other equipment.
As for this pair of headphones, the NE750M is improved by Nuforce's previously introduced classic ear canal earphone NE700M. It is the backbone of the NE series ear canal earphones. The NE750M's earphone casing is cylindrical and made of metal CNC. Into, the surface is treated with black matte finish, the color is warm and the texture is good.
The biggest difference between the NE750M and the NE700M is that the front cover of the former is designed by Nuforce's specially developed "aperiodic load sound chamber". It has 7 small holes around the outer casing. This design can make the rear of the unit The gas has a venting outlet to prevent the pressure change in the cavity during the operation of the monomer to cause sound to the sound. On the other hand, the sound waves generated behind the monomer can also be transmitted from these small holes, so as to avoid excessive sound waves reflected by the back cover. It affects the sound waves that are transmitted in the direction of the ear, thus maintaining the clarity of the sound.
As for the NE750M's single unit, the Nuforce "Brilliance UWB" titanium-plated diaphragm dynamic drive unit is used. This monomer has a diameter of 8.6mm. As we all know, titanium has a good treble extension performance, so Nuforce uses a large The calibre design and the titanium-coated diaphragm design NE750M has a wide frequency response. According to the specifications provided by the original manufacturer, the frequency response of the NE750M is 20Hz - 20kHz, although I do not know the attenuation of the frequency response curve in the high and low frequency bands. However, it is believed that the monomer under such design should have good extension characteristics at both the high and low frequency ends. As for the driving structure of the single body, the coil made of aluminum-plated copper wire is more quality than the pure copper voice coil. Lightweight, can improve the efficiency of the headphones, with a powerful neodymium magnet, is more conducive to reproduce the impact of sound.
During the audition, I played the digital audio file through the Audirvana Plus 1.5.10 installed on the Macbook Pro, and the USB Cable used the Type A-Micro B USB cable attached to the Astell & Kern AK 120.
First of all, play the second movement of the Baha's BWV1035 E major flute sonata, which is light and brisk. Through this mini-headphone system, the positioning between the three instruments, such as harpsichord, flute and oboe, is not like The two-channel system is as clear and flexible as listening, but you can still feel the proper and comfortable distance between each other. The space is abundant, the sound will not be crowded together and the turbid feeling will be felt. What's important is that although the NE750M is just a small ear canal earphone, it has a very similar sense of open earphones. The sound field is wide and wide, and there is no pressure that is all squeezed into the brain. In addition, play through this system. The harpsichord sounds bright and colorful. The flute sound is as white and comfortable as cotton. The oboe sound is deep and thick. The three instruments have distinct characters, but they all have comfortable and soft sounds. The shape is moderate, the proportion of flesh and blood is just right, and the cold thorn is not felt at all. Feeling, showing a relaxed, lively musical mood.
After listening to the relaxed and comfortable classic interiors, how can the sexy jazz music play through this mini system? I play the sound of Saxophone in "Sine Qua Non" (COUP PERDU 01, CD to AIFF), with The full shape, with warm temperature, can faintly feel the high-pitched vibration caused by the airflow from the mouth of the player, which is in line with the imagination of the saxophone sound. In the depths of the space, the brush can be clearly heard. The sound of the cymbal is like the brass surface treated with matte surface, shining with a warm copper luster, and with a fine grainy texture like a beach sand, while the bass cello sings on the side, although its shape is not like a large Earphones or horns are as prominent as they are heard, but they also show a firm, full-bodied flesh. The subsequent piano performance, full of sound, and a charming pearl luster, 1:40 The violin sound of the second line, the sound line is smooth and smooth, with silky noble luster. The sound of each instrument not only has a comfortable and warm texture, but more importantly, the ME750 conveys the sense of hearing and open headphones.
Next, play "Bauer Studios: Experiences the sound" (Bauer Studios SRM018CD, CD to AIFF file) jazz female voice song "Everything Allowed", listen to the female voice performance of this mini headset system. Opening the saxophone, jazz Drum, piano, and bass cello play, just like the previous one, play through this set of headphones to convey a comfortable and pleasant mood, but the recording of this album has the characteristics of outstanding shape and clear details, so the piano is every The keys touched the sound, which is more grainy, and the drum is subjected to the moment of knocking. The details of the drum skin vibrating quickly are more like slender feathers. Every hair in the ear is shaken with every auditory nerve. Bright. After the female voice singing in the recording, you can immediately feel that the song has a pure, light tone, and between the words, you can clearly hear the airflow from the lips and tongues, but not too much Loud, harsh, and the right proportion between the song and the song. The relaxed atmosphere of the jazz tavern and the intimate feeling close to the stage, NE750M + μDAC3 The work was presented.
Finally, the song "Gotta leave" from the British blues rock group "Back Door Slam" on the album "Roll Away" (Blixstreet G2-10087, CD to AIFF), the opening sound, the sound is loud, the drum rhythm is solid. Powerful, the sound is straight, the sound breaks out quickly, the rhythm is strong, and it doesn't make people feel rigid and hard and harsh. As for the electric guitar playing the main melody, the sound position is slightly in front of the drum sound, the sound band There is a very strong vacuum tube smell, you can hear its performance with the left hand finger on the strings, resulting in soft and flexible pitch changes, people can not extricate themselves. After the male voice, the texture is loose, but not Losing strength, you can hear the emotional emotions in the singing. Although the dynamic fluctuation of this system is not particularly broad, but the listening can still clearly feel the emotional ups and downs of the song.
In order to test the DSD playback performance of μDAC3, I finally played (Nabulando) <MA Recordings, M052A, 2.8MHz DSD> in Sera Una Noche. The result can be played smoothly, even if the song is placed in PCM audio file. In the list, whether it is the previous song after the broadcast to the song, or the song is skipped to the next song, it can play without hindrance, there will be no stuck or crashed, no annoying The murmur appears.
Compared with the 24 bits/96 kHz WAV file of the first song, the DSD file has a lower volume and a slightly lower frequency. However, the texture has a transparent, loose air feel, and the texture is light and the shape is slightly larger. Different sense of hearing. μDAC3 can play DSD files, just giving users the opportunity to experience the special sound of DSD.
Combining the above senses, I found that this system achieves a perfect balance between music and sound. It can not only be clear in detail, but it will not be too sharp, it will not be tired for a long time, and it will be more comfortable with warm and comfortable sound. In addition to the touching emotions in the music. In addition, the NE750M has an unimaginable sense of space openness, and even more people forget that this is just a small ear canal earphone.
Is there any headphone system that doesn't take up space, and the price is affordable? Of course! Optoma Nuforce has a very strong marketing power, and recently launched a special combination of NE750M ear canal DAC + μDAC3 mini DAC ear expansion, the price is even more than a pair Tide brand headphones are cheaper and more tempting. However, is the sound of this earphone system as fascinating as the price? Recently, this system sent the evaluation of this site, let me tell you slowly.
The μDAC3 sent this time is a red version. The surface of the aluminum alloy case is finely sanded and anodized, which makes the surface of the μDAC3 shine brightly and looks more fashionable than the black version sent last time.
The size of the μDAC3 is 68 x 38 x 21mm, which is smaller than the area of ​​the palm. It may be officially limited by this size. The USB input of the μDAC3 uses a smaller form of Micro B instead of the usual Type B, and adopts USB 5V. Power supply. Although the fever line designed for the Micro B USB jack is not common, users can plug the μDAC3 into the computer if they have a USB charging cable for the Android phone. No need to find another Type A- Type B USB transmission line, very convenient.
The headphone output hole of μDAC3 is 3.5mm. Although it is only powered by USB, according to the specifications provided by the original manufacturer, the output power of each channel can reach 80mW under 16 ohm resistance. It is believed that the general low impedance ear canal earphone is not a problem. In addition, the μDAC3 also has a digital coaxial terminal and a pair of analog RCA output terminals. It can be used as a DDC and a two-channel DAC. It has various functions and is more flexible with other equipment.
The biggest difference between the NE750M and the NE700M is that the front cover of the former is designed by Nuforce's specially developed "aperiodic load sound chamber". It has 7 small holes around the outer casing. This design can make the rear of the unit The gas has a venting outlet to prevent the pressure change in the cavity during the operation of the monomer to cause sound to the sound. On the other hand, the sound waves generated behind the monomer can also be transmitted from these small holes, so as to avoid excessive sound waves reflected by the back cover. It affects the sound waves that are transmitted in the direction of the ear, thus maintaining the clarity of the sound.
Next, play "Bauer Studios: Experiences the sound" (Bauer Studios SRM018CD, CD to AIFF file) jazz female voice song "Everything Allowed", listen to the female voice performance of this mini headset system. Opening the saxophone, jazz Drum, piano, and bass cello play, just like the previous one, play through this set of headphones to convey a comfortable and pleasant mood, but the recording of this album has the characteristics of outstanding shape and clear details, so the piano is every The keys touched the sound, which is more grainy, and the drum is subjected to the moment of knocking. The details of the drum skin vibrating quickly are more like slender feathers. Every hair in the ear is shaken with every auditory nerve. Bright. After the female voice singing in the recording, you can immediately feel that the song has a pure, light tone, and between the words, you can clearly hear the airflow from the lips and tongues, but not too much Loud, harsh, and the right proportion between the song and the song. The relaxed atmosphere of the jazz tavern and the intimate feeling close to the stage, NE750M + μDAC3 The work was presented.
Finally, the song "Gotta leave" from the British blues rock group "Back Door Slam" on the album "Roll Away" (Blixstreet G2-10087, CD to AIFF), the opening sound, the sound is loud, the drum rhythm is solid. Powerful, the sound is straight, the sound breaks out quickly, the rhythm is strong, and it doesn't make people feel rigid and hard and harsh. As for the electric guitar playing the main melody, the sound position is slightly in front of the drum sound, the sound band There is a very strong vacuum tube smell, you can hear its performance with the left hand finger on the strings, resulting in soft and flexible pitch changes, people can not extricate themselves. After the male voice, the texture is loose, but not Losing strength, you can hear the emotional emotions in the singing. Although the dynamic fluctuation of this system is not particularly broad, but the listening can still clearly feel the emotional ups and downs of the song.
In order to test the DSD playback performance of μDAC3, I finally played (Nabulando) <MA Recordings, M052A, 2.8MHz DSD> in Sera Una Noche. The result can be played smoothly, even if the song is placed in PCM audio file. In the list, whether it is the previous song after the broadcast to the song, or the song is skipped to the next song, it can play without hindrance, there will be no stuck or crashed, no annoying The murmur appears.
Compared with the 24 bits/96 kHz WAV file of the first song, the DSD file has a lower volume and a slightly lower frequency. However, the texture has a transparent, loose air feel, and the texture is light and the shape is slightly larger. Different sense of hearing. μDAC3 can play DSD files, just giving users the opportunity to experience the special sound of DSD.
Combining the above senses, I found that this system achieves a perfect balance between music and sound. It can not only be clear in detail, but it will not be too sharp, it will not be tired for a long time, and it will be more comfortable with warm and comfortable sound. In addition to the touching emotions in the music. In addition, the NE750M has an unimaginable sense of space openness, and even more people forget that this is just a small ear canal earphone.
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