Hello everyone, I am a rogue talent. The spring of March was slightly cold, but the earphone circle was full of excitement. Last weekend, the talented scholar went to Guangzhou to participate in the 2019 new product launch conference of FiiO. The trendy new products have not been listened to. This weekend, I will go to the Shanghai Headphone Show to help Help blindly listen to the conference, but the daily sharing can not be delayed on business trips, so today’s push is available.

A while ago, a familiar and unfamiliar customer walked into the evaluation room of the forum and said it was familiar because the brand was one of the earliest old domestic brands, established in the early 1990s; said it was unfamiliar. It's because I haven't had a chance to hear this brand's new products for nearly ten years. Memories are a very mysterious thing, so Xinxinran applied. A brand from Zhongshan, Guangdong: Shengya, its ultra-small all-in-one machine HAS-1.

Before I received the machine, my expectations were limited to: this machine should not be very big. After I got it, I found out that this machine is a little bigger than a slap, and there is no sense of disobedience in the packaging carton of the Yinke 4001 earplugs. This is the same as the elegant appearance of heavy tanks more than ten years ago. It's not a way. I was curious to check the official website and I was relieved. Shengya is still the one that specializes in high-end products. Most of its products are still heavyweight styles, but they have quietly opened a new series to the desktop. The system has been popularized and extended, but there are not many people-friendly products under its umbrella, so it is reasonable to believe that HAS-1 should be a careful and serious step in this field.

When I was writing this sharing, I saw another old domestic brand original, which launched two desktop amplifiers that take into account both amps and power amplifiers in one breath, and Shanling Obersbach, also a national brand, has also been in a few years Earlier, the focus of R&D and promotion was shifted from the armored vehicle production line to the portable and desktop production line. Since the beginning of this year, I have come into contact with and listened to a lot of equipment, all of which run counter to the traditional large-scale split desktop style. In this era of technology, the pace of life and the rapid development of housing prices, it seems that only light clothing is the way to adapt to the trend of the times. It is precisely because of this that, as an old-fashioned one, I also want to take this opportunity to find some more novel ways to play for HAS-1.

In the process of considering the matching, I found that this small HAS-1 is quite complete. It is equipped with a four-core balanced headphone output port on the panel, but there is no 6.35mm port on the single-ended output. Instead, it is replaced. 3.5mm is a bit weird. After all, for players, it is more convenient to turn a small plug from 3.5 to 6.35, but if you turn a 6.35 big ear to 3.5, you will feel a little unreliable. On the back of the machine that corresponds to the signal on the panel one-to-one, you can see that the digital output is a relatively common coaxial optical fiber USB. If the optical fiber is used for personal use, it is basically coaxial and USB that are usually used. The input of the group RCA is available for selection. In other words, the HAS-1, like the Champs-Elysées on hand, can be used as an amp/preamp alone. The official claims that the amplifier circuit of the HAS-1 is Decentralization of its high-end front-end technology. But judging from the positioning of the machine itself, using it as a part of the split headphone system is not in keeping with its own positioning. I personally think that it is most appropriate to use it as a whole. As a whole, what needs to be equipped for HAS-1 is just a digital source. PC, digital broadcasting, mobile phone, or other.

It can be said that until the end of last year, I still had no idea about the term "Raspberry Pi". At the beginning of this year, I received a second-hand mouse raspberry pie generation. After a lot of research and toss, I discovered that this small digital source is so It is not unreasonable to be sought after and affirmed by players. Perhaps my personal understanding is not comprehensive. In my opinion, the Raspberry Pi is a low-power host. The operating system and the player are burned into it. It plays an external U disk or mobile hard disk. The overall function is relatively simple and the screen is omitted. , The main page can be seen by accessing the webpage through a mobile phone or computer in the same local area network. The simple structure and low power of the Raspberry Pi make its internal wiring very simplified, and the corresponding interference is very small. Therefore, as long as the power supply system is stable, The quality of its USB output digital signal is better than most computers, but the shortcomings of the Raspberry Pi are also obvious. One is that the software expansion capability is far inferior to that of the computer. The second is that the lower limit of the USB output quality is very high, but the upper limit But it is also limited. Compared with a well-optimized computer or digital broadcast (for example, the recently played AURENDER ACS10), it is only a medium level, but with an entry-level all-in-one such as HAS-1, it is enough. Playing the track-grabbing files in the mobile hard disk is significantly better than the laptop at hand. Therefore, for the audition of HAS-1, I also chose a very compact partner, the Raspberry Pi 1st generation (equivalent to Raspberry Pi + Mouse Linear Power 1st Generation) USB direct connection to HAS-1.

Different from the direct connection to the PC, the HAS-1 is recognized immediately after it is connected to the MouseBerry Pi. There is no need to worry about the driver. This is also the advantage of a highly integrated small system, but I still need to mention the hardware of the HAS-1. The common XMOS interface solution and SA9277+PCM5102A dual-chip decoding are used. The amplifying part uses 2 OPA 604 from BB Company. Although I am not a one-sided party, but from the configuration point of view, the analog amplification part is used. It should be more interesting. It is no wonder that HAS-1 provides a function that can be used as an amp or pre-amp alone (I commented on the Champs Elysées a while ago, and the analog amplification part is more focused). And a period of use also proved that I accidentally guessed right.

Unlike the one or two albums that talented scholars have chosen to listen to in the past, this time I chose to listen to this year's headphone exhibition offline: the 2019 Shanghai Headphone Exhibition's blind listening contest audition. Why is it an audition? It’s not difficult for everyone to know from the introduction of the exhibition that there are 6 finalists, which belong to the six categories of ACG, Classical, Folk, Pop, Jazz, and Rock. Some types of tracks are optional at the beginning of the selection. Therefore, the first audition of the tracks, the earliest version is 10, and I will not spend much time here, the complete introduction of the track has been attached to the download link at the end of the article, you can check it yourself.

It can be said that the music library of this blind listening audition includes most of the music styles that most people usually enjoy. So when these selections are shown one by one on HAS-1, what will it be like? The earphone chosen to drive listening is Sennheiser HD650 with a replacement balance line. The reason why the traditional and classic HD650 was chosen instead of ADX5000 is because HAS-1 is taking the entry-level cost-effective way, not for mid- to high-end desktop players For positioning, it is not wrong to use HD650 with it. After the sound is turned on, this combination gave me a performance that was different from what I expected.

First of all, I did not expect that the HAS-1 power reserve under the balance port is extremely abundant. The volume knob is only rotated from the initial 7 o'clock position to the 8 o'clock position, which is enough to listen to the sound pressure in normal times, and this is still on the panel. On the premise that the upper GAIN gain button is not pressed (the gain will increase by 2db after pressing it), in this state, the HD650 is full of power, and the sound appears very healthy and cheerful. The overall presents a warm tone, not Dull. And this is another surprise for me. I have heard some entry-level all-in-one computers, especially those with XMOS interface, which will produce cold and hard digital sound if they are not handled well, but HAS-1 is not this way. On the contrary, In order to take care of the hearing resistance, it has also taken a step closer to being slightly warmer. Fortunately, this style and quality are placed on HD650 headphones, which does not appear to be lacking in details. It is a good cover for the amount of information on the entry-level equipment. The general phenomenon of insufficient.

Looking back, the two sentences we usually hear are perfectly fulfilled in HAS-1. The first sentence is: vigorously works miracles. Because of the abundant power, HD650 can be pushed up and raised. The sound will not shrink into a ball, at least the width of the sound field is guaranteed. The second sentence is: Those who get the mid-range win the world. HAS-1 chose a warmer tone to make the full mid-range radiate like sunlight. Although it is a stone machine, it has a bit of courage (personal guess and OPA604 has a certain relationship), which makes the ears feel very pleasing. Although listening carefully, you will feel that the two ends are extended to obliterate some of the depth of the dive and high-frequency overtones, but this subtractive tuning is exchanged for It is the improvement of fault tolerance and low frequency flexibility. This kind of processing method, if it is placed on a 5K or higher level all-in-one machine, I would think it is a bit of speculation, but for the 2K level HAS-1, it is completely acceptable. In fact, when we discuss and evaluate the sound quality, the positioning of the evaluation object itself must be considered. Another element is the matching. If the HD650 is replaced with the ADX5000, it will show the playground sound that the details are not full of headphones, just like the HD800 It was criticized when it was first launched.

The performance of the small size combination made me cheer up. This is a combination that is characterized by warmth and endurance and can be appropriately hidden. It can cope with most music, but the obvious weaknesses also need to be complained. One is the sound. The vertical layering is not very good. Although it is not obvious in popular vocal jazz rock, but in the performance of classical music, the octet is the largest classical composition it can handle; the second is the panel The 3.5mm socket is really better than nothing. At first glance, I thought it was prepared for earplugs, but when I plug in a few low-resistance and high-sensitivity moving iron plugs, I will always hear more or less noise due to excessive power. I feel that the built-in amplifier part of HAS-1 is a high-impedance amp, not suitable for low-impedance, so it is recommended to cancel the 3.5mm interface on the panel and change it to a 6.35mm interface, so that users can rest assured to wait for the high-impedance headphones. This is the HAS- 1. Duty and good at. 

At the end of the article, I feel familiar with the process of HAS-1, which is also the process of running in with the new new gameplay of Raspberry Pi with the all-in-one. The whole system (including HD650 headphones) is equipped, not only the volume is very small and light, but the total price is also It is 5K level, not even as good as many high-end products, but the fun is really incomparable to other gameplays. This is unimaginable in the era when Shengya only made tank-level equipment, as a burning technology under the continuous development of technology. Friends and Leyou, we are still happy, aren't we?