1, effective output power or continuous music output power
2. The frequency response range is 20HZ-20KHZ, and the wider the range, the better.
3. Harmonic distortion thd
4. Signal-to-noise ratio >; 90db, the bigger the better, the less noise.
5. High channel separation and accurate phase positioning.
The sound is false to the eyes and true to the ears, so you must listen to it live. After turning on the mobile phone, turn on the music, turn on the volume switch, listen carefully to the speaker for filar silk and buzz, and test the sound. Select the audition disc, check whether the high, middle and low tones of the audition sound are clear, and test the frequency response sum.
Harmonic distortion. Amplify the sound to see if it is weakly distorted and test the power. It's a 5. 1 amplifier, so it's necessary to shoot a large piece to test the phase positioning, such as the hovering segment of the plane. Materials that are lighter than weight are also sufficient.
What parameters of the speaker look good?
The wider the frequency response, the better. The higher the SNR, the better. The sensitivity is above 80. The less distortion, the better. The performance of built-in power amplifier can not be ignored. The speaker should listen to it by himself, because everyone enjoys music in different ways. See what kind of music you like.
How to judge the quality of speakers? What do you mainly look at?
A preliminary understanding of the speaker before the audition
A preliminary understanding of a pair of speakers can be identified by the steps of "observing, weighing, tapping and identifying": observing the process, weighing, tapping the box and identifying the nameplate. The concept of technology is to judge the quality from the first appearance of the speaker: the speaker made of natural logs is of course the best, including many world-famous high-priced supreme speakers such as chario and guarneri in Italy. Because of environmental protection, lack of resources, difficult processing technology and long time, it will never be as popular as the ubiquitous "Rejoice" shampoo. Therefore, the common speakers are decorated with a thin layer of wood veneer on the surface of mdf medium density fiberboard: solid wood veneer, beautifully decorated speakers, especially rare wood veneers such as rosewood, sparrow eye, pear wood, walnut, Zhennan and red oak, which have excellent natural wood grain visual effect and smooth and comfortable feel. Especially those pianos polished with symmetrical butterfly pattern solid wood skin after multi-layer coating can be regarded as high-end boutique speakers, and there are very few counterfeit products. Boxes wrapped in pvc( *** Li) plastic belong to bulk commodities. Although the workmanship is fine, it can only be regarded as low-grade goods at best. However, although the box decorated with this kind of paper veneer looks extreme, it is more important to pay attention to whether the sewing behind the box and the digging process of the horn installation position are accurate. Fake and shoddy products generally don't pay attention to these details, and they can be judged correctly with a little care.
Second, weighing: Good speakers mostly use 18 ~ 25mm high-quality mdf particle board, while high-end flagship speakers use overweight solid wood such as rosewood and yellow pomelo or multi-layer composite plywood, which is amazing in weight. Usually, the net weight of a pair of speakers reaches 50 or 60 kilograms. Most middle and low-grade customers eat soft particleboard, while fake and inferior products use inferior paper rubber board, so the weight is generally light. There is often a saying in the audio industry that "experts look at quality, laymen weigh it", and heavy speakers are definitely better than light speakers. However, it is necessary to be wary of unscrupulous merchants pouring sand and cement at the bottom of the sound body to gain weight and deceive consumers.
The third is to knock on the box: knock on the front, back, left and right baffles of the box with your knuckles, and all sides of the box will be heavy and slightly brittle. It feels that the plate is hard and thick, supported by many reinforcing ribs inside, the box structure is reasonable and firm, and various sound insulation and standing wave prevention measures are adopted. This kind of box has high processing cost and great difficulty, and there are few fake and shoddy products. If you hit the box with your knuckles, it will make a "poof, poof" empty sound, indicating that the plate is too thin, the material is too poor and the structure is unreasonable. And there is no sound absorption material or reinforcement inside, which leads to a large number of diffuse reflection and standing waves in the box. You will never get a good playback effect if you buy this kind of speaker.
The fourth is to identify the nameplate: the really good speakers have well-made gold-plated or chrome-plated nameplate signs, and the nameplate is generally engraved with distinctive trademarks, companies, names, places of origin and corresponding indicators. Imported boxes are in English, such as xxx manufacturing or manufacturing, corresponding trademarks, speaker indicator lights, etc. If only the design ... (XX design) or only a country name is vaguely marked, even apart from a few simple and extremely imprecise basic indicators, neither the place of origin nor the manufacturer can be seen, and the trademark has no registration mark. Most of these three products are suspected of counterfeiting. Brand-name speakers attach great importance to brand image and corporate visibility, so the attached nameplate logo is very standardized and exquisite, with all indicators, corporate names and places of origin available. Some nameplates are even thin metal plated with 24k real gold, and the fonts on them are still uneven. The product not only has the date of manufacture and production serial number, but also has the matching serial number and the ID card attached to the packaging box. For this kind of speakers, as long as the price is reasonable, you can generally choose with confidence.
5. Judging the advantages and disadvantages of speakers from technical indicators.
As mentioned above, a technical label is usually attached to the back of the finished speaker: the content is nothing more than the frequency range, sensitivity, carrying power and impedance of the speaker. Sensitivity is the most important indicator of the speaker, which largely determines what kind of power amplifier the box should be equipped with, how much power it needs to push, and so on. The sensitivity of most audio-visual home speakers is between 86 and 92 decibels. For the same power amplifier, at the same volume (for example, the volume is adjusted to 10), the higher the sensitivity, the louder the sound, and the lower the power requirements and requirements of the speaker for the power amplifier. This is what people often say: speakers are easier to push. The sensitivity of professional speakers used in many commercial ok halls exceeds 100db, so it is no wonder that many people feel this way when they go to ok halls to sing karaoke ... >; & gt
How to distinguish the quality of a computer stereo?
As an audio lover, I want to talk about my own opinion: technically, the quality of audio mainly depends on various parameters. If it is a brand audio, it generally does not falsify the parameters. But one thing, most people don't understand the meaning of parameters, so ears are the most important. When choosing a stereo, you must first determine your own purpose, because the producer of the stereo also has its strengths and weaknesses. Hivi rambler and BBK are famous in domestic audio, but in multimedia audio, I personally think rambler is better. Because the computer obtains the sound source mainly through the Internet, and the free sound sources on the Internet are not high-quality sound sources, it is necessary to cover up the defects in this aspect through bass, so the rambler has done a good job in subwoofer. Shivi ·BBK, etc. Being a family music center is very good, because they started from producing family music centers. In terms of sound quality, it is best to choose a pure wooden shell, but it is not bad if the interior space of the producer's speaker is well designed. Besides, trust your ears. You feel comfortable listening is the most important thing. For example, I like to listen to symphonies, so I choose high-quality ones. If I like listening to pop music, I will choose a sound with good bass. Remember that branded goods are very important.
How to see the quality from the sound parameters?
The main technical indicators of sound system are: frequency characteristics, signal-to-noise ratio, dynamic range, transient response, stereo separation and stereo balance.
Frequency characteristics: the frequency range (frequency response) of audio equipment during playback and the relationship between signal amplitude and frequency (amplitude-frequency characteristics). The unit of amplitude is dB, and the unit of frequency is Hz. The frequency response of the sound system should be at least 32- 18000Hz, and the signal amplitude change should be less than 2dB within this frequency range.
Signal-to-noise ratio: the logarithm of the ratio of useful signal to noise at the same reference point. At the input point of the speaker, the signal-to-noise ratio is 70dB, and the noise is almost inaudible when the human ear is one meter away from the speaker, and the Hi-Fi system generally reaches more than 100dB.
Dynamic range: the logarithm of the ratio of the maximum undistorted output power of audio equipment to the static system noise output power. Hi-Fi system generally reaches 100dB or above.
Distortion: the degree of distortion of the sound source signal when the audio equipment plays back. There are harmonic distortion, intermodulation distortion and transient distortion. The harmonic distortion of Hi-Fi system is generally less than 1%.
Stereo resolution: the resolution of the left and right channels. Reflect the crosstalk degree of the left and right channels.
Stereo balance: the difference between the signal gains of the left and right channels.
The general indicators of each part are as follows
1, sound source: signal-to-noise ratio, output level, output impedance, frequency response, dynamic range, harmonic distortion, etc.
2. Power amplifier: various powers, various harmonic distortions, frequency response, signal-to-noise ratio, damping coefficient, etc.
3. Sound box (sound box): sensitivity, frequency range, power, distortion, signal-to-noise ratio, input impedance, etc.
Specific to the car audio system, plus a seismic coefficient.
In fact, the most important thing in a good sound system is audition. There is a saying about the sound system that "seeing is false, listening is true".
Subjectively evaluate a set of audio, mainly from the following aspects:
1 sound quality.
2, timbre.
3. Control of quantity and high, medium and low and sense of quantity.
4. Studio performance.
5. Density and weight of sound.
6. A sense of transparency.
7. layering.
8. sense of positioning.
9. sense of life.
10, imaging power and somatosensory.
1 1, analytical ability.
12, instantaneous response and speed sense.
In view of your question, I can only answer so much. I usually live in the love HIFI forum. If you have any questions, please come to the expert version of the love HIFI audio forum to find me.
How to see the speaker parameters?
1 Is the horn as big as possible? Generally speaking, yes, the field of speakers will be very open, and the bass layering will be more prominent. If you listen to voices, it will not exceed 8 inches. Generally, it is more appropriate to use 6.5 inches or 5 inches. The best material is wool basin, and the tweeter will use 1 inch silk dome unit. Paper basin speakers are the most poisonous to human voices. It needs to be equipped with a courage machine, but it is difficult to find a good paper basin now.
Is the wattage of the second horn as large as possible? Yes, the high-power dynamic is good, the relatively undistorted power will be higher, and a high-power power amplifier is needed. Generally, 50- 100W is enough for a room.
The impedance of the third horn is 4 ohms, 6 ohms, 8 ohms and so on. Is the ohm number as high as possible? No, generally, the power with low impedance will be larger and the sensitivity will be higher. It is easy to push with a power amplifier, generally not more than 8 ohms.
Take a look at the explanation of how to distinguish the sound quality from the sound level.
The main parameters of sound are power, signal-to-noise ratio, impedance, frequency response and speaker size. Power depends on your own requirements, generally 20W can meet the space of 20 square meters; The signal-to-noise ratio should be above 75FB; Impedance is not important, generally 4 ohms; Frequency response is very important. To identify the dynamic range of this sound, the human hearing range is 20Hz to 20 Hz, and the better the range can be, the bass should be below 30Hz.
How to identify the quality of a speaker?
First of all, this is a reprint, not an original!
1. Preliminary understanding of the speaker before the audition
A look at the technology: Common speakers are decorated with a thin layer of wood veneer on the surface of MDF. The speakers with solid wood veneer are beautifully decorated, especially rare wood veneers such as rosewood, sparrow's eye, rosewood, walnut, nanmu and red oak. Their natural wood grain has excellent visual effect and smooth and comfortable feel. Especially those pianos polished with symmetrical butterfly pattern solid wood skin after multi-layer coating can be regarded as high-end boutique speakers, and there are very few counterfeit products. Boxes wrapped in PVC( *** Li) plastic belong to bulk commodities. Although the workmanship is fine, it is best to only
Second, weighing: Good speakers mostly use 18 ~ 25mm high-quality MDF particle board, while high-end flagship speakers use overweight solid wood such as rosewood and yellow pomelo or multi-layer composite plywood, which is amazing in weight. Usually, the net weight of a pair of speakers reaches 50 or 60 kilograms. Most middle and low-grade customers eat soft particleboard, while fake and inferior products use inferior paper rubber board, so the weight is generally light. There is often a saying in the audio industry that "experts look at quality, laymen weigh it", and heavy speakers are definitely better than light speakers. However, it is necessary to be wary of unscrupulous merchants pouring sand and cement at the bottom of the sound body to gain weight and deceive consumers.
The third is to knock on the box: knock on the front, back, left and right baffles of the box with your knuckles, and all sides of the box will be heavy and slightly brittle. It feels that the plate is hard and thick, supported by many reinforcing ribs inside, the box structure is reasonable and firm, and various sound insulation and standing wave prevention measures are adopted. This kind of box has high processing cost and great difficulty, and there are few fake and shoddy products. If you hit the box with your knuckles, it will make a "poof, poof" empty sound, indicating that the plate is too thin, the material is too poor and the structure is unreasonable. And there is no sound absorption material or reinforcement inside, which leads to a large number of diffuse reflection and standing waves in the box. You will never get a good playback effect if you buy this kind of speaker.
The fourth is to identify the nameplate: the really good speakers have well-made gold-plated or chrome-plated nameplate signs, and the nameplate is generally engraved with distinctive trademarks, companies, names, places of origin and corresponding indicators. Imported boxes are in English, such as Madeinxxx or Manufacture, corresponding trademarks, speaker indicators, etc. If only the design ... (XX design) or only a country name is vaguely marked, even apart from a few simple and extremely imprecise basic indicators, neither the place of origin nor the manufacturer can be seen, and the trademark has no registration mark. Most of these three products are suspected of counterfeiting. Brand-name speakers attach great importance to brand image and corporate visibility, so the attached nameplate logo is very standardized and exquisite, with all indicators, corporate names and places of origin available. Some nameplates are even thin metal plated with 24K real gold, and the fonts on them are still uneven. The product not only has the date of manufacture and production serial number, but also has the matching serial number and the ID card attached to the packaging box. For this kind of speakers, as long as the price is reasonable, you can generally choose with confidence.
2. Judging the advantages and disadvantages of speakers from technical indicators.
Sensitivity: The most important indicator of a speaker largely determines what kind of power amplifier the box should be equipped with and how much power it needs to drive it. The sensitivity of most audio-visual home speakers is between 86 and 92 decibels. For the same power amplifier, at the same volume (for example, the volume is adjusted to 10), the higher the sensitivity, the louder the sound, and the lower the power requirements and requirements of the speaker for the power amplifier. This is what people often say: speakers are easier to push. The sensitivity of professional speakers used in many commercial OK halls exceeds 100dB, so it's no wonder that many people think that singing karaoke in OK halls is very pleasant, and you can get a great volume with no effort. Don't think that the higher the sensitivity, the better. Speakers with sensitivity over 92dB are all thin metal pots and PP pots, which will destroy the control of speakers, resulting in thin, beautiful, exaggerated and tough sound quality, and many details and charm of music are missing. Not suitable for high-fidelity listening. However, many famous mouths with rich and soft voices and full of music are usually less sensitive. For example, the sensitivity of top speakers such as Emperor ATC, Italian piano and Li Zhuo is only 82dB. This kind of speaker is often extremely difficult to serve, and it needs a giant power amplifier with a large output current to make it work in the ideal linear region, and the cost will never be small.
Frequency range: For example, the frequency range of the domestic boutique Xindeke Compass 1 bookcase is 60Hz ~ 20 kHz 2.5 dB, and 60Hz represents the extension value of the speaker in the low frequency direction. The lower this number, the better the low frequency response of the speaker: 20KHz means that the speaker can ... >; & gt
Excuse me, how to distinguish the sound quality with parameters?
Power amplifier: rms1.6wx2 (thd+n =10%)
Signal to noise ratio of power amplifier: ≥85dBA
Distortion: less than 0.5%
Line input impedance: 10K ohm
Input sensitivity: 350±50mV
Speaker: 1 3/4 inch (48 mm outside diameter), antimagnetic, 6 ohms.
Adjustment form: potentiometer adjusts the volume.
Input power supply: DC 5V
Box size: 2 18 (width) x 76 (height) x 27 (depth) mm (excluding base)
Weight: about 0.63Kg