Create a clean path from the speaker to the listener’s ear The perception of stereo sound depends on subtlety and in particular on the presence of live sound as well as the immediate feedback that follows. Incoming sounds play a general role in what you’re hearing, but they’re not as important in stereo as the “first-in” effect (the latter is considered unimportant by the ear/brain’s decision). spatial and positional information). Now do you understand what we mean by “clean road”? You don’t need anything on the floor or anything else close to the path from the speakers to where you sit. The floor and ceiling of the listening room should be flat and smooth because high frequency reflections will be minimized. If the ceiling is not very high, it is better if it is made of a soft and smooth object. The problem here is that rough materials, such as appliances and furniture, will cause the sound to be distributed unevenly. This is one reason why the stereo effect is blurred and the ideal performance cannot be obtained. A friend in the test room asked me to close my eyes to test the change of stereo sound when there is an obstacle in front. When the music plays, I feel the change quite clearly, the stereo comes out in parts, becomes distracting and the sense of space is seriously affected. Then my friend told me to open my eyes. What surprised me the most was that he just silently placed the CD cases on the floor symmetrically between the speakers and a few in front of us. This is obviously not a huge physical change, but it does sabotage stereo performance a lot. So what if you put a coffee table or put a few remotes on it symmetrically with two speakers and in front of a music chair? Maybe it will be convenient for you to enjoy the melodious music while sipping a cup of coffee, but you will certainly not be able to fully feel the stereo performance. Get rid of objects next to you, use a chair with a low back Although using a chair with a low backrest, the arrangement of the chair as shown in the picture makes it impossible for both listeners to experience the stereo effect. Hard objects near your ears along a straight line are seen to greatly affect when you listen to music. It’s best to sit in a chair with a very low back, as that will put nothing near your ears. If your back doesn’t adapt to this, you should at least use a chair that doesn’t go over your head and make sure it’s soft. Hard leather sofas become weak points because they reflect high frequencies. If you are sitting alone, cover the area behind and near your head with a cloth curtain. Because otherwise, a lot of high frequencies will be scattered before reaching you, or in other words, the back wall of the listening room should design sound-absorbing materials or accessories. But using a low chair is still best. Try it! You will be surprised how much better your system will sound. Symmetry rule Stereo sound is based on symmetry between two channels. For the latter, where people are exposed to large amounts of treble diffusivity, the role of symmetry is diminished. But for anything that comes first with the sound of low frequencies, the role of symmetry is indispensable. In the old days, when many audio players didn’t understand how stereo really worked, and especially didn’t fully appreciate the importance of the intrinsic tonal time difference, many would try to make adjustments. difference between the two channels by electronic means, i.e. adjust the equalizer and use a separate equalizer for the channels. The result was, of course, a disaster, because analog equalizers and EQs couldn’t deal with asymmetric timing effectively. When that happens, the actual digital signal processing (DSP) may be full of detail, but the problem lies in the accuracy. So it’s better to make the whole system as symmetrical as possible from the start. As always, the tuning DSP room works best when there is a lower frequency response peak and sag and is less demanding for correction (the one exception is the very wide, very useful bass correction. useful in practice). Part of the task of symmetry is on you, which is to keep the two speakers evenly spaced. In general, everyone does this, but they don’t do it fully and carefully. Let’s take a quick look at the numbers. People can hear a time difference between the two ears of about 1/100,000 of a second. But let’s stay conservative and give it only 1/50,000th of a second. How far will the sound go in 1/50,000th of a second? Well, a millisecond (1/1000 of a second) is about a footstep. So 1/50,000 is about 12/50,000 feet, which is about a quarter of an inch. So if you want stereo speakers, you need to get them within a quarter of an inch. Time is a measure! Mark the spot and keep it there. Sit near your speakers loa There will always be some sound coming soon that you really don’t expect. So try to make them symmetric and have smaller amplitudes, but there are bound to be some limits. The way to minimize their effects is to make the live sound appear as early as possible. Sitting close to the speaker is how you do this. Of course, you also can’t sit too close, because most speakers depend on a certain distance for the accuracy of the drivers. And to some extent, you need some distance to avoid hearing the microscopic vibrations because that can make the speaker more visible than the music source. But you’ll get the best stereo sound if you sit reasonably close to the points. Many people sit too far and to the far end of the room due to the fact that the music room is too long. Sitting closer to the speaker changes the direct sound reflection ratio. You should also sit away from the wall behind your back, and the speakers should also be away from the wall behind them (unless they are designed to be wall-mounted), because positioning the speakers and listeners too close to the wall will cause discomfort. benefit the sound of a stereo system. Need a soft room Many recordings (CDs or LPs) are made with the expectation that some room sound will be added as the music plays. A few other recordings were made with the expectation that they would not be echoes when heard. But all those effects don’t stand a chance if your listening room is too small. In my opinion, the best stereo sound should be presented in an RFZ (no-reflection room) room. In such a room, early incoming direct sound will be in moderation, and sound reflection will soon be absorbed. After you hear the live sound, the listening room will appear to be assisted by sound diffusion, where discrete sound reflections are not evidence, or the sound will arrive too late after the initial sound. arrived. As a result, live sound is heard more clearly, without being confused. While building an actual RFZ room is quite a challenge, you can handle it well by making a “soft” listening room, which will especially help the treble get the most out of it. In addition, a soft acoustic environment will also result in more harmonious notes. If your music room has a large picture, use fabric drapes to cover it while listening to music. In particular, the wall of the music room made of glass would be a disaster. A few years ago, a friend brought to my apartment a system to edit rooms. Then this apartment had a spectacular view, located on a high ground and had a long wall of nothing but glass and steel support. But when it comes to music, it’s clear this room can’t get the most out of it unless I add some curtains. Sit still and close your eyes Part of that symmetry is placing the music chair in the right position. Unless you move the seat straight forward or backward, you will end up in an asymmetrical position! But there is another way of sitting that is really subtle and more important than the effect. This is a complex topic so I can only give an overview. As the brain builds perception from raw data during processing, what we “see” or “hear” is not the same as light in our eyes or sound in our ears. Because it’s just a mental construct. This particular mental construct often includes the following surprising things: it will use many signals, but if one signal is lost, the brain will recognize it as lacking and simply reprogram itself to use other signals. This may sound crazy, but there’s a simple visual experiment you can illustrate with that principle. Look at a photograph with a lot of three-dimensional (3D) material in it or at a painting with strong perspective, then you will get some impression of a three-dimensional image. But if you look at them with one eye closed and the other through a short tube that blocks the background and only allows you to see the picture, there is a surprising increase in the perception of three-dimensional images. If you’ve never tried this, you’ll have a hard time believing that your eyes can see the background around the picture of the picture (the way you usually look at a picture), and the brain will pick up some signal about the picture. that three-dimensional perspective. But the brain will also receive information that the surface of the painted or printed picture is in fact only two-dimensional. Binocular vision shows a fatter picture, and the background shows it too. So the brain is getting conflicting signals, which means it allows you to see some of the three-dimensional image, but not all of it. When you look with one eye and don’t see the background, the signal to that fatter image is blocked. Going back to the world of sound, one of the ways the brain detects the position of an object, the shape of the hearing room, of space, or in general auditory terms, is to slightly move the head and Notice the changes in the sound. People will have the feeling that they suddenly “sink into” the space of stereo sound. There are some people who choose to sit absolutely still. This will put the listener in a quiet state, and obviously very suitable for listening to music. And, to my ears, the stereo got better. Finally, closing your eyes also eliminates cues that a person can’t hear in a concert hall or a stadium, but can hear from the speakers in your listening room. In short, sit with your eyes closed, with your head completely still, in a chair near the speakers in a “soft” room and in the correct symmetrical position with no obstructions in the line. between you and the speaker. If you do all that, I guarantee your stereo system can perform at its best. Hope you find the best stereo sound!

SINE Gateway 2 (Nano Platinum Edition) – 80A power source filter, 20kg “huge” chassis, filter by choke roll The first impression of SINE Gateway 2 is the extremely solid metal block design, weighing up to 20kg, completely without screws, combining shockproof and vibration-canceling materials with pure graphite particles. All components, wires, and component sockets inside Gateway 2 are optimized for current transmission with CRYO technology, which is cold-annesed at -196 degrees for two days, and 8 outlet sockets are plated with platinum precious metal, which helps increase the efficiency of dynamic performance reproduction. SINE Gateway 2 has a total of 8 output sockets, designed to sound down on a very thick metal surface, this thick aluminum block both prevents electromagnetic interference from penetrating (from the environment) and helps to secure the power cord plug. than. Filter noise with 2 choke coils The only technology that is considered to be SINE equipped for Gateway 2 is the choke filter. This technique is not new, but because of its high cost, choke filtering is usually only used by expensive lamp amplifier manufacturers. The advantage of choke filtering is noise optimization, but harmonics are almost kept intact.

Reference price: 87,000,000 VND S-60A Pt Edition large power source filter – Dual magnetic conduit technology, precious metal plated socket The S-60A Pt Edition is an upgraded version of SINE’s very popular S-60A power filter. This device has an impressive design in the shape of a poweramp, the front panel is up to 10mm thick, allowing anti-shake and EMI/RF interference. To optimize resonance, SINE S-60A Pt Edition is also equipped with a special layer of vibration-absorbing material in the form of graphite crystals lining the bottom. This power filter has 8 outlet sockets arranged on the back, divided into 2 sockets for digital devices, 2 sockets for poweramp and devices that require large current levels and 4 sockets for analog devices. In particular, the sockets have been upgraded from the gold-plated version to the platinum-plated precious metal, helping to increase the efficiency of detail reproduction and especially the dynamics. SINE S-60A Pt Edition uses filter technology with a pair of magnetic pipes that can withstand loads up to 60A, which not only prevents noise from affecting detail, harmonic distortion, but also provides a much quieter background. The input CB of the S-60A Pt and all its sockets and internal wires have undergone a 48-hour cooling treatment with a temperature of -196°C. The circuitry prevents overload or sudden surge of current due to electrical problems. from the input is also fully equipped by SINE for S-60A Pt Edition. In its product range, SINE also offers smaller capacity power filters such as the S-30A Pt Edition, S-20A and S-2X.

Reference price: 52,000,000 VND SINE Caspian 5 Pt – Isolation transformer 5 KVA, equipped with Cyro cold filter socket and Platinum plating SINE Caspian 5 Pt has an anti-vibration aluminum chassis design up to 8mm thick with all components such as CBs, wires, sockets being treated with Cyro cold filtering to optimize the molecular structure of the conductor surface. The 8 rear outlet sockets are plated with platinum instead of gold as usual. The heart of the SINE Caspian 5 Pt is a 5000 VA toroidal transformer wrapped around with a noise-proof copper plate. With the advantage of blocking and isolating all kinds of noise from the upstream power but almost unchanged the characteristics of the line, along with a large capacity of up to 5 KVA, SINE Caspian 5 Pt is chosen by many audiophiles to equip systems. ultra hi-end big.

Reference price: 88,000,000 VND SINE SAT-3KV – 3000 VA capacity isolation transformer, vertical chassis design Designed specifically for providing isolated power to high-end hi-end systems, the SINE SAT-3KV inherits many technologies from the flagship Caspian 5 Pt model. This model has a capacity of 3KV, 8 outlet sockets with a vertical chassis design, allowing for compact layout in the corner of the room, built-in display of output voltage indicator. Duplex oultet sockets (USA) are also applied by SINE with Cryo cold annealing process along with gold plating to optimize contact points. SINE SAT-3KVA uses a toroidal transformer with high purity copper quality, but is not shielded like the Caspiam 5 Pt model.

Reference price: 55,000,000 VND SINE SRT-5KV Pt Voltage Stabilizer – Prevents noise and stabilizes output voltage for home cinema and audio systems The output voltage stabilizer or voltage stabilizer for hi-end audio systems requires special techniques to ensure noiseless and clean power supply. SRT-5KV Pt is specially designed for audiophiles by SINE, the chassis is made of thick aluminum, the bottom has anti-vibration pins, with a display of the output voltage. In Vietnam, there are many areas where the grid power supply is not stable, SINE SRT-5KV Pt ensures to receive variable input power from 195 V to 245 V, while providing stable output in customizable levels from 195 V to 245 V. 205 to 235V with an extremely fast response rate of only about 15-20 milliseconds. For small and medium-sized systems, SINE also offers the SRT-3KV voltage stabilizer design with a capacity of 3000VA.

Reference price: 110,000,000 VND SINE NIDAS HC+ power lead – 30A load-bearing, anti-interference, anti-vibration In the power supply system for the hi-end system, the set of 3 CBs – wall sockets and power leads play a very important role. These components are the starting point for providing a clean, stable power source. NIDAS HC+ power lead is a very successful product of SINE, with good load response and anti-interference ability on the transmission line, used to connect from the floor CB to the wall socket of the listening room or go from the main power meter to the listening room. . One of the most important requirements of the upstream conductor is the load bearing and thermal resistance to ensure electrical safety. SINE NIDAS HC+ wire has a heat-resistant layer of up to 105 degrees Celsius. In addition, SINE is equipped with a laminated copper foil armor to prevent electromagnetic interference along the way. The NIDAS HC+ power cord has a coaxial structure consisting of 5 wire cores of 10AWG size (equivalent to 5.26 mm2), with a load capacity of up to 30A. In addition to the 5 main wire cores, SINE is specially equipped with 2 very soft rubber tubes, which have good vibration absorption effect, optimize electron transmission, this is a special technique only applied in wires expensive audio source. Of course, NIDAS HC+ conductors are cryo-treated by SINE at -196 degrees Celsius. In addition to NIDAS HC+, SINE also has other upstream leads such as Zunmu, Nidas…

Reference price: 7,500,000 VND/meter SINE CYRO MCB – CB (Aptomat) is optimally designed for audio systems SINE’s CB is highly appreciated by audio players, providing a very clear sound effect, increased power, better control, and the detail separation between the two channels is also significantly increased. . SINE’s CBs are sourced from famous German brands, which handle cold annealing and optimize contact points.

Reference price: 3,400,000 VND SINE SW-2XT US (Nano Platinum) table top wall socket – EMI/RF anti-interference, 2-layer phosphor bronze and platinum precious metal plated contacts SW-2XT US (Nano Platinum) is SINE’s most advanced double wall socket equipped with impressive transmission and anti-interference and anti-vibration technologies. The SW-2XT US socket has a very thick aluminum block exterior with beautiful milling lines. This cover has a very important effect, preventing external electromagnetic interference from contaminating the power source. In addition, this design also contributes significantly to anti-vibration and helps the power cord plugs to be firmly fixed, especially for large and heavy diameter power cords. The two outlet sockets of SINE SW-2XT, in addition to being cold annealed by SINE Cryo technology, are also covered with 2 layers of plating at the contact points. These two plating layers are phosphor bronze and platinum, respectively. Thanks to this technique, the SW-2XT socket delivers enhanced audio performance in many factors. First, the background is quieter, the dynamic is good, then the listener can clearly feel the microphone detail. Besides the SW-2XT US (model with SW-2XT long mask (L)), SINE also has more affordable wall sockets such as SW-2PT US and SW-2G US.

Reference price:

SINE SW-2XT US (Nano Platinum): VND 4,500,000

SINE SW-2XT (L) (Nano Platinum): VND 4,800,000

SINE SW-2PT (L): 3,200,000 VND

SINE SW-2G US: 2,800,000 VND SINE SW-2PT US Wall Socket (Platinum) Epilogue Owning a full ecosystem of hi-end electrical equipment from power lines, filters/stabilizers, isolating transformers to sockets, wires… helps SINE become one of the brands that provide system The most comprehensive and efficient power supply system for hi-end and home cinema.