Op amp test experience

Recently, a few friends around me played the stereo and became hooked on the mill for the op amp, CD player, power amplifier, and even the sound card on the computer to get 827, 275 or something. So on the weekend, I deliberately spent some money, went to the Amoy Stacker (both Tao Feng) and came back to test, briefly talk about feelings.

NE5532: It is indeed a bit daring, the resolution is average, the high frequency is relatively dry, and the low frequency is relatively thick and fat.
op275: Compared with 5532, it is a bit more daring, with better resolution, low frequency, and sound field. You can buy patches to polish the sound card (especially innovative), which can improve the hard and cold digital sound.
EL2244: The sound is neutral, the sound field is relatively wide, the high frequency is okay, and the middle frequency music has a bad taste. Some people say that the resolution is very high. In fact, it is because the low frequency sense is small, the middle frequency is thin, and the high frequency is prominent. It's harder to use well.
LT1057: The two ends extend well, and the speed, dynamics, and resolution are also very good, that is, the color is cool, the music released seems to have a taste of not eating human fireworks, so that you can listen quietly, but you ca n’t burn the music. That passion.
AD827: The extension is very good, the resolution is high, the high frequency is gorgeous, the middle frequency is pure and thick, the low frequency dive and the strength are good, the sound field expands forward and backward, left and right, and has a bumpy feeling (this is stronger than other op amps), the speed is fast, The dynamics are good and I feel very angry. After the initial replacement with this op amp, it really feels amazing. But after listening for a long time, I also found a lot of problems. 1 Although the three frequency bands and the sound field are very wide, ambitious, and wide open, they always feel that the structure is a bit loose and not tight enough. The 2 vocal parts are general, sometimes dynamic When the vocals are overwhelmed by the soundtrack, 3 is not delicate enough, which is more than passion and lack of tenderness, and 4 is not musical enough. But many people like this style. Of course, it's okay to buy two films to change the taste. According to my feeling, it should be suitable for watching DVDs on AV amplifiers.
OPA2604: It feels like an upgraded version of 5532. It has been greatly improved in all aspects. It has good resolution, better music taste, and bold taste. The sound floor is relatively pure and a little rigid, and the overall quality is very good.
DY649: Compared with 2604, the resolution is better. The high-frequency part is slender and soft and rich in overtones. The bottom of the sound is not 2604 thick. It is very clear and detailed. The music picture is very clear. The vocal part is round and transparent. A sweet feeling, human voice (especially female voice) is its strength.
DY639: The wholeness is slightly weaker than 649, but it has the characteristics of a bile machine, and the bile taste is stronger.
DY669: Not much different from 2604, pure voice.
AD712: The resolution is very good, the sound is clear and without sound stains, a very transparent feeling, the sound bottom is detailed, and the low frequency is slightly less. It belongs to a typical monitoring style. However, many people may not like the feeling of pure water. It is better to add some MSG. It is probably the reason why I have played music production before. I am used to this pure monitoring taste and am very interested.
AD712 (Gold Seal): I was curious for a while, and I went to get a gold seal the next day. Compared with Tao Feng, I feel better resolution, more pure bottom and thicker sound. Sound field positioning is good. ... When I first started listening, I felt as if the vocals were not as clear as Tao Feng. I was taken aback. Later, after repeated comparisons, I found out that because Tao Feng ’s high frequency is relatively blunt, straightforward, and the voice is thin, the human voice It seems bright, so there is this feeling, or the gold seal has higher hearing resistance. However, it is not recommended to use, because now Jinfeng can't find the disassembled parts, only to buy a brand new one, it costs 75 yuan, and this price can buy a better model.
AD797: Dongdong, which is worth trying, has a very friendly voice and was detained immediately after the test at a friend's house. 45 yuan
Because of time constraints, I bought these stuff. There are other more high-end 627, 2111 (100 yuan), DY2000, AD927 (as if I have n’t heard of it), I have the opportunity to try again later, especially a store that highly recommends the gold that is called "the invincible player" The cover OPA2604 (200 asking price) is very attractive.
Finally, talk about the test feeling:
1 This op amp is still good, it is relatively simple and effective to play 2 Actually, it has reached the level of 2604, the resolution, sound field, musicality and other indicators are also quite good, and high-end op amps are very good. The characteristics are mainly based on my own music tastes. 3 has been tested in several places successively. Different amplifiers have different feelings. It seems that the circuit design is still the most important. My friend ’s British CD player sounds very good. It is composed of eight 5532 op amps.
4 It is very important to match, I have a Spark CD player and AD10 headphones (sound dyeing is very heavy), and it is muddy and thick, high frequency and harsh. It usually does n’t smell like it has been idle for a long time, so the op amp on the handle After testing one by one, the two of the CD players were replaced by DY649 and the 5532 on the amp was replaced by 712 (1057 is also acceptable). Then listen to the headphones, clear and transparent, rich in details and powerful bass , Especially the vocal part is very prominent. It feels like a pair of headphones. After borrowing a friend's K501 test, I feel that the 827 + DY649 combination is the best.
5Always want to find more high-end op amps, try a better effect, for this feeling will result in more energy and RMB. Ha ha, it's better to stop at a moderate level.
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