The GRADO Goethe-series headphones are known for their rough work, dynamism, enthusiasm, and full of personality. They are well-known for listening to fashion, male voices and jazz (in fact, they are also very good at listening and speaking), and are widely loved by young people, even in conservative European countries. The HI-FI community, including the United Kingdom and Germany, has also been widely acclaimed. . Some people think that Goethe is a low-frequency earphone. I think it is absolutely wrong. Goethe's low-frequency is the most appealing and flexible, not the feeling of hypertrophy and low-frequency head (yes, I mean koss pp). I have a Goethe GRADO SR80 with Deep Sear's PC330D 3D G4ME 7.1 USB sound card. Listening to music, watching discs, and playing games are almost omnipotent. Now I use several sponge sets. However, today is not a headset. It is a "headphone amplifier." Many places are referred to as "two rooms." It is estimated that someone should say that Goethe's headphone has a small impedance, so it is not very good. They did not know that they also followed a "sensitivity", also known as "sound pressure value, sensitivity." The headphone (plug) indicator usually has two items of impedance and sensitivity, so there are four different types of headphones (plugs): high-resistance, high-sensitivity, high-resistance, low-sensitivity, low-resistance, low-sensitivity and low-resistance. The original value of more than 3k is like this, excluding RS1 headphones. The matching headset is here: Chinese enthusiasts have researched various versions: Basic Edition: Advanced Edition Advanced Package Edition: Advanced Product Version: What I bought was an assembled plaque: The seller said that the low-end version is suitable for battery power, and the sound quality will be better. I asked the seller if they could use 2 DC transformers instead. The seller said no, it would be greatly deteriorated, so I honestly bought batteries. It is indeed a very simple thing, ah, there is a hand-based can completely DIY their own play. Unfortunately, my soldering iron is waste wood and can only be purchased as a soldered version. Looking at the bare circuit board was uncomfortable, so I went to the supermarket overnight, bought a box of sugar, and then dropped the sugar. Take out the tools I have measured in the world, After a while, this appeared: The space is just right, and the lower two 9V batteries can be plugged behind. Pay attention to the bottom of the tin box to be affixed with a layer of transparent plastic as the insulating layer, and do not tighten the screws fixing the circuit board too tightly. The first time I screwed it too tightly, the solder joints puncture the transparent tape and short-circuited, and the temperature is high. Do not. Fortunately, it was not burned... Front port opening is also very accurate, and saw the craft is not abandoned! Summary: After the Sr80 was on the second bedroom, I found that my ear did not hear a big change, perhaps the thrust of the USB sound card in the deep sea was good, maybe it would be effective if we had to match the original factory. It is also a university. Two-room push low-resistance low-sensitivity headphones, the power requirements are not high, the current requirements are high, RA-1 amp op amp and capacitor selection of different brands will get different timbre, a few days free time tb Amoy look To see if there are suitable op amps and capacitors, change the time to play and see what changes will occur. This is where DIY's fun lies. Another: Recently, in some original HIFI-related comments, filled with a large number of "mysterious", "hydropower nuclear power" type of reply, I personally feel that this reply in the enthusiast forum as self-mockery, but also a pleasure. But if outsiders use such words to comment on advanced audio equipment in the hands of others, there is a little “sour grape†taste. (Of course, my original content is too shabby, far enough for seniors, everyone please enjoy the bricks, I'm poor.) Audio equipment Although there are many factors in charge, but most of the high quality goods and general products, the sound quality gap, Ordinary people can easily distinguish between them. There is no metaphysical category. Smart Switch Kabel,Intelligente Steuersignalleitung,Home Control Signalleitungen,Smart Bus Kabel Jiangsu D-Bees Smart Home Co., Ltd. , https://www.cI-hometheater.com
High resistance and high sensitivity: Shure E5c Impedance: 110 Ω Sensitivity: 122 dB
High impedance and low sensitivity: Beyerdynamic DT990 Impedance: 600 Ω Sensitivity: 96 dB
Low resistance and low sensitivity: Goethe SR80 Impedance: 32 Ω Sensitivity: 99 dB
Low Resistance and High Sensitivity: Deep Sea Big Hammer Impedance: 18 Ω Sensitivity: 113 dB
The higher the sensitivity, the louder the sound, and the smaller the impedance, the easier the headset will be driven. Low resistance headphones eat current, high impedance headphones to eat voltage. Most of the amps are high-impedance headphones. The legend that is most difficult to push (not equal to push) is the low resistance and low sensitivity headphones such as the Goethe SR80, which requires a dedicated current amp. Fortunately, Grado had a wonderful story: RA1 amp, for their own RS1 headphones, with a few electronic components, only the current amplification does not amplify the voltage, attracting numerous countless. 
October 05, 2024