This link isFinished machine, Our shop also has finished boards, kits and other peripherals!
defaultGildedCircuit board!
WithOriginal MC33078 op amp,Han YongshengGold-plated headphone socket,
2 types of chassis are available, as shown in Figure 1! defaultALPS27Potentiometer.
Amp byUpc1237 plus dedicated signal relay constitutes the earphone protection circuit, Under any circumstances can ensure the safety of your high-end headphones! The relay is the original signal relay of Takamizawa, and the two models of the chassis are not remarks. Two models are available for optional appearance
Component selection:
Excellent stability in useALPS16Potentiometer.Gold-plated headphone socketPHILIPS good sound filter capacitorTakamizawaSignal Relay Pure copper feet 6 ringsPrecision resistanceFW seriesGold mounted capacitor decoupling,ELNA RESSeries blue robe filter! United StatesON SemiconductorVoltage stabilization and so on! !
The customized version of the amp has better sound. You can choose various configurations according to your needs, such as ALPS16 27 potentiometers, WIMA capacitors, etc. Because of the customized products, they cannot be returned. Please pay attention.
What is Beyerdynamic A1:
Beyerdynamic A1 isBeyerdynamicThe brand-produced A1 professional-grade amp has a sound performance that many sound engineers and audio mixers are obvious to all. The sound performance is not exaggerated here.
The picture is an old version picture, the new version is actually released! ! ! !
Exclusive features:
1）Use high-quality large factoriesFully sealed potting transformerAnd perfect grounding, the whole machine has no bottom noise.
2）Two independent imports are used for the left and right channelsInternal high temperature signal line, The resolution is higher.（Blue blue silver white random）
3) A large number of applications of high-precision components andPrecision matching, Which makes the positioning of the instrument more accurate and the sound field is good
4) Featured JapanALPSPotentiometers have better accuracy and longer service life.
Component selection:
Excellent stability in useALPS16Potentiometer.Gold-plated headphone socketPHILIPS good sound filter capacitorTakamizawaSignal Relay Pure copper feet 6 ringsPrecision resistanceFW seriesGold mounted capacitor decoupling,ELNA RESSeries blue robe filter! United StatesON SemiconductorStabilization and so on! !
PCB process selection:
Just use the military high-precision CNC processing the gold-plated circuit board, the flying probe full detection circuit, better stability, and the guarantee of the gold-plated sound quality! Seiko manufacturing!
（This kit, the finished machine uses the following resistors!）
Other related accessories
MatchingChassis2:http://item.taobao.com/item.htm?id=38567738411
Audio sealingRing cow:http://item.taobao.com/item.htm?id=38567738411
Q&A:
Why use an amp:
The power amplifier is equivalent to a low-power power amplifier with a small power output. General audio sources such as mobile phones and MP3 can only drive general headphones. The sound strength is not concentrated enough, the bass is dull but not heavy, and the high pitch is not bright. I feel impatient after using it for a long time. The amp has sufficient output capacity and better current distribution capability, which can easily drive 600Ω headphones. The addition of earphones forced both sound strength and relaxation. Improved sound performance.
How does this sound perform:
This kit has been carefully made by you, combined with high-quality power transformers and more standard front and rear equipment, and the sound performance is good. This is the reason why many fans continue to pursue the production. After all, the original machine is more than 6,000 licensed.
What are the requirements for power supply:
It is recommended to use dual 12-18V power supply, the power consumption of this machine is 5W, and it is recommended to use a high-quality transformer of 15-30W. The board is very rectified and filtered, and the transformer can be directly connected to the circuit board.
Why upgrade the filter capacitor:
The essence of the power amplifier output is to convert the power supplyThe signal is converted into audio output, and the power quality directly affects the soundStrength,Transientwhich performed. The filter capacitor specially designed for audio has ultra-high charging and discharging speed and ultra-low tangent loss, so the output of the transformer is fully and effectively filtered to improve the sound quality!
How does this capacitor sound go:
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The Beyerdynamic A1 amp, which is made with the original circuit, has excellent sound performance and is the high end of the DIY amp!