MG2 Portable Headphone Amplifier High Voltage Class A Transistor Tube Type Amplifier HD650 HD700 HD800s HD820 HDV820 Headphone
$250.00
Ex Tax: $250.00
- Stock: 50
- Model: 32961976966
- Weight: 0.50kg
- Dimensions: 10.00cm x 16.00cm x 8.00cm
- SKU: 32961976966
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This one is BUF634 power IC doing the amplifier, it isn't a OPA IC chip amplifeir, so it is a great power headphone amp!BUF634 is power IC is more greater than OPA IC!
The amp has 4 level: level 1 and level 2 is the same price . Please leave message which do you need when you make the order .Level 1 MG2 with OPA627BP (OPA627 partial neutral, charm)Level 2 MG2 with discrete card FL1 (discrete card FL1 is gentle, fresh and natural);Level 3 MG2 with discrete card FL2 (discrete card FL2 is transparent, line sense);Level 4 MG2 fuselage with discrete NT1906A op amp (NT1906 open-loop gain: 68dB or so (2500 timesthe open-loop gain) transient distortion (the main source of harsh sound harsh) than a 100+dB chip is much better; sound performance Very perfect, delicate, transparent, high resolution, deep bass, medium thick, sweet treble......)
A discrete
Machine size: 7.1 cm x 13.5 cm x 2.5 cmWeight: 0.25KGcard is a circuit card that is constructed using discrete components and has the same function as the operational chip.Shipment default gain is 5 times maximum! Push low and medium resistance (16-600 ohms), 5 times gain under 300 ohms can output 0.4W, 600 ohms impedance can output 0.2W,For maximum gain (3x)! Push the low resistance (16-250 ohms) please contact customer service custom or message.The gain step is 1, 3, and 5 when the maximum gain is 5 times.The gain step is 1, 2, and 3 when the maximum gain is 3 times.The maximum gain refers to: when the knob is turned to maximum, the output (relative to) input is multiplied by the magnification(The actual volume is adjusted by the knob, the maximum gain only determines the maximum output)For specific gain adjustment, see the adjustment diagram at the bottom.Mono channel peak output current up to 0.25AFor the noise, please see the test chart below. I won't say much. In short, the low noise is very low.Better promotion, meticulous improvementExtreme bass!Cost-effective! !I am an electronic engineer who loves music and does it with a strict attitude. Therefore, many devices are used to detect performance and assist design. I don't like to judge good or bad by ear alone. Many things are relative.Does the headset really need an amp? The most common parameter of the headphone unit is the impedance. However, in addition to the inherent impedance of the headphone, there are magnetic fields, inertia, and other factors. In addition to meeting the power consumption of the impedance, the headphone also needs a lot of power to counter the inertia, which is equivalent to driving the car. , A car can easily go to 100Km / h speed, and most of the time is running 200 hours below the speed, why should increase the horsepower to make 100 kilometers to accelerate the car for 3 seconds? This is the same reason. Although they all drive (listen), they do not feel the same.
MG2 low battery reminder functionWhen the battery level is lower than 30%, the indicator light changes from the original steady light to flash to remind you that it should be charged.MG2 power supply designMG2 uses dual 15V voltage supply, the higher the voltage, the lower the distortion rate. When the peer test distortion rate is tested, the amplifier outputs 1V voltage, so the distortion rate of the test will be very low, but most of the headphones Above 1V output voltage, our distortion test voltage is 5V. Some even messed up the distortion rate to fool the fans.Compared with some amps on the market, which use low-voltage power supply, and also need to remove the battery to charge, MG2 is obviously not so complicated! For some people, the sound of the device using the switching power supply is not good. As far as I know, the HDVD800 uses the switching power supply! Sony's amp is also... Why can't they say it? In the final analysis, there is no technology to pass through. Even battery-powered devices cannot suppress the problem of noise, let alone use switching power supplies, and many of them will not make switch-mode power supply designs. They will copy other people's circuits and modules. The power to be used as an audio must be accurately calculated and designed... Many of the peers can't eat grapes and say sour grapes! High voltage also allows the line to work at its best, just as high voltage is used on the bench.MG2 frequency response spectrum test
1. MG2 has the same great power amplifier with desktop headphone amplifeir. Becasue of it is double 15V.2. Maximum distortion-free output voltage level.3. Reserved voltage is 4V, Maximum distortion-free output voltage, it is about 4V.4. Double 12V.5. Double 9V.6. 300 ohms Maximum distortion-free output power is 0.4W600 ohms Maximum distortion-free output power is 0.2W7. 300 ohms Maximum distortion-free output power is 0.21W600 ohms Maximum distortion-free output power is 0.1W8. 300 ohms Maximum distortion-free output power is 0.083W600 ohms Maximum distortion-free output power is 0.041WFrequency response range of MG2: 2Hz-72KHz (-3dB), very beautiful response curve
The test chart with 627 op amp is as follows: distortion rate <= 0.00557%
The test chart with the discrete card FL1 is as follows: distortion rate <=0.00883%(Although the open loop gain is only 40 times, the distortion rate does not increase much, even harmonics are rich, and it is very natural and comfortable to hear)
MG2 material selectionThe bypass capacitor of the op amp adopts Japanese Nikon WIMA, which creates a great reserve force for the op amp to play!In order to reduce transmission loss and become more ideal, WIMA capacitors were selected;
MG2 working modeFor sound quality, we have opened the BUF634's Class A broadband mode. Under the positive and negative 15V, there is a certain amount of heat. When the temperature is 30 degrees, the temperature of the BUF634 can reach 68 degrees. The actual use of the shell will be warm!MG2 battery selection and protectionFor this reason, Japan's Panasonic 18650 high-capacity lithium battery was selected. Each section has a capacity of 3400mAH and is supplied in series. It has an independent protection circuit and a current sharing function, allowing you to use the peace of mind and rest assured! For better contact, the shrapnel of the battery case has been removed and soldered directly from the single crystal copper silver plated wire!