German EPRO preamplifier fully imported*

GermanyEPRO preamplifierFully imported*

Taking a simple front-end as an example, it usually only has the function of selecting the signal source and controlling the volume of sound, but don't underestimate it. In fact, the quality of the sound is greatly related to whether the front-end is operated correctly and calibrated. Leaving aside tuning, let's take the volume knob as an example. It can be said to be an art form, where the volume level can affect the overall sound quality of the system. In the small town where I live, there is another feverish friend who enjoys listening to the sound of drums. When entertaining guests, the drumming is continuous, and the volume knob is usually turned to the 12.00 O'clock or 13.00 O'clock position. Who can stand it. No matter what music he listens to, he always listens at the same volume, thinking that a well recorded natural sound must be pleasant to listen to. What's even more alarming is that he thought loud meant good, so whether listening to symphonies or playing a single instrument, he used the same volume to listen. However, when you hear Teresa Teng's singing voice, her petite body becomes as majestic as Yao Ming's, her violin expands to a double bass cello, and her guitar's high notes resemble antique pianos, while her low notes resemble drums.
Why do these friends listen to music like this? Purely because they are missing out on attending concerts, orthodox live concerts. When he hears symphonic orchestras played in the same concert hall, the volume of a single instrument played, and the sound produced by a real instrument, he will understand what the proportion of sound is, in order to understand the loudness of a single instrument played. Apart from listening to live performances, the other way to understand the sound and volume of musical instruments is to listen to live performances that do not require an amplifier system. So when you listen to canned music on those CDs again, you won't adjust the volume without any guidelines, which not only distorts the sound, deforms the instrument, and causes discomfort to your ears, but also may damage your hearing!
The ultimate skill of volume control is to make one's audio equipment perform at the highest level possible, accurately reproducing the volume levels of bands, solo instruments, and live singing! It's the 1:1 volume of HiFi, the same proportion of volume, and the same size of stereo sound field, as if the entire symphony orchestra is performing live in the listening room at home! Audiophiles believe that as long as they bring home the most expensive equipment in the world, they can achieve such a scenic world. In fact, it's not as simple as he imagined, there is a lot of knowledge involved.

German EPRO preamplifier fully imported*

Translator's note: This is an article that I have just started translating in the past two days. The purpose is to comply with the requirements of netizens in the forum and will be posted in sections. I hope everyone can be patient and wait.
When asked about the issues that need to be considered when choosing a preamplifier, I suddenly remembered that the three preamplifiers I owned were all purchased by me when I couldn't make a choice and chose one that met my own ideas (of course, not all three preamplifiers were purchased at the same time). What a stupid method!? Since I am so stupid, do I still have the qualifications to continue writing this article?
The goal of adding a preamplifier is to achieve synergy between your audio source (s) and the amplifier. Whenever you have the opportunity to listen to multiple preamplifiers connected to your system, you may not be able to determine which one produces better sound than the other. The reason is that those with good sound are usually more or less expensive, or that the preamplifier has put a lot of effort into circuit design.
When choosing an ideal preamplifier, you must clarify two things
A. Your audio source output voltage (the maximum voltage for a CD drive is 2 volts);
B. The input sensitivity of your amplifier (most amplifiers are around 1 volt) Your amplifier's input first * first * first * first * first * first * first enters sensitivity (most amplifiers have 1 volt around)
You must know whether the output level of your CD drive or other audio source is less than or greater than 2 volts. On the same note, if the output of your power amplifier first enters sensitivity less than or greater than 1 volt, you should also be aware of it. Once you truly know these voltages, you can choose the correct preamplifier.

GermanyEPRO preamplifierFully imported*

West (Shanghai) Sensor Instrument Co., Ltd. is a company engaged in the production and agency of various sensors, instruments, and solenoid valves. As the agent of many well-known sensor, instrument, and solenoid valve manufacturers in China, the company provides users with high-performance and reasonably priced sensor, instrument, and solenoid valve products. Mainly including sensors, instruments, solenoid valves, etc.